CN117538393A - Automatic detector for heavy metal in water - Google Patents
Automatic detector for heavy metal in water Download PDFInfo
- Publication number
- CN117538393A CN117538393A CN202311769033.8A CN202311769033A CN117538393A CN 117538393 A CN117538393 A CN 117538393A CN 202311769033 A CN202311769033 A CN 202311769033A CN 117538393 A CN117538393 A CN 117538393A
- Authority
- CN
- China
- Prior art keywords
- detection
- module
- contactor
- electrode slice
- cabinet body
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 62
- 229910001385 heavy metal Inorganic materials 0.000 title claims abstract description 54
- 238000001514 detection method Methods 0.000 claims abstract description 143
- 238000012545 processing Methods 0.000 claims abstract description 30
- 239000007788 liquid Substances 0.000 claims description 23
- 239000012528 membrane Substances 0.000 claims description 23
- 238000004458 analytical method Methods 0.000 claims description 16
- 239000007924 injection Substances 0.000 claims description 11
- 238000002347 injection Methods 0.000 claims description 11
- 230000000670 limiting effect Effects 0.000 claims description 11
- 238000003756 stirring Methods 0.000 claims description 10
- 238000004891 communication Methods 0.000 claims description 9
- 230000000149 penetrating effect Effects 0.000 claims description 3
- 230000010354 integration Effects 0.000 abstract description 4
- 238000012544 monitoring process Methods 0.000 description 15
- 238000000034 method Methods 0.000 description 9
- 239000003673 groundwater Substances 0.000 description 8
- 238000004140 cleaning Methods 0.000 description 5
- 230000008569 process Effects 0.000 description 5
- 238000003968 anodic stripping voltammetry Methods 0.000 description 3
- 239000006172 buffering agent Substances 0.000 description 3
- 150000001768 cations Chemical class 0.000 description 3
- 238000002848 electrochemical method Methods 0.000 description 3
- 238000011065 in-situ storage Methods 0.000 description 3
- 150000002500 ions Chemical class 0.000 description 3
- 230000035945 sensitivity Effects 0.000 description 3
- 238000003950 stripping voltammetry Methods 0.000 description 3
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 2
- 230000009471 action Effects 0.000 description 2
- 238000001479 atomic absorption spectroscopy Methods 0.000 description 2
- 238000001391 atomic fluorescence spectroscopy Methods 0.000 description 2
- 229910052793 cadmium Inorganic materials 0.000 description 2
- BDOSMKKIYDKNTQ-UHFFFAOYSA-N cadmium atom Chemical compound [Cd] BDOSMKKIYDKNTQ-UHFFFAOYSA-N 0.000 description 2
- 239000011651 chromium Substances 0.000 description 2
- 238000004737 colorimetric analysis Methods 0.000 description 2
- 125000004122 cyclic group Chemical group 0.000 description 2
- 238000011161 development Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 235000013305 food Nutrition 0.000 description 2
- 238000003895 groundwater pollution Methods 0.000 description 2
- 238000001095 inductively coupled plasma mass spectrometry Methods 0.000 description 2
- 238000002354 inductively-coupled plasma atomic emission spectroscopy Methods 0.000 description 2
- 210000001503 joint Anatomy 0.000 description 2
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 description 2
- 229910052753 mercury Inorganic materials 0.000 description 2
- 229910052751 metal Inorganic materials 0.000 description 2
- 239000002184 metal Substances 0.000 description 2
- 238000013508 migration Methods 0.000 description 2
- 230000005012 migration Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 239000000243 solution Substances 0.000 description 2
- 238000003860 storage Methods 0.000 description 2
- 239000002699 waste material Substances 0.000 description 2
- VYZAMTAEIAYCRO-UHFFFAOYSA-N Chromium Chemical compound [Cr] VYZAMTAEIAYCRO-UHFFFAOYSA-N 0.000 description 1
- RYGMFSIKBFXOCR-UHFFFAOYSA-N Copper Chemical compound [Cu] RYGMFSIKBFXOCR-UHFFFAOYSA-N 0.000 description 1
- PWHULOQIROXLJO-UHFFFAOYSA-N Manganese Chemical compound [Mn] PWHULOQIROXLJO-UHFFFAOYSA-N 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- BUGBHKTXTAQXES-UHFFFAOYSA-N Selenium Chemical compound [Se] BUGBHKTXTAQXES-UHFFFAOYSA-N 0.000 description 1
- HCHKCACWOHOZIP-UHFFFAOYSA-N Zinc Chemical compound [Zn] HCHKCACWOHOZIP-UHFFFAOYSA-N 0.000 description 1
- 238000009825 accumulation Methods 0.000 description 1
- 229910052785 arsenic Inorganic materials 0.000 description 1
- RQNWIZPPADIBDY-UHFFFAOYSA-N arsenic atom Chemical compound [As] RQNWIZPPADIBDY-UHFFFAOYSA-N 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000003139 buffering effect Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000000711 cancerogenic effect Effects 0.000 description 1
- 239000003153 chemical reaction reagent Substances 0.000 description 1
- 229910052804 chromium Inorganic materials 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 229910052802 copper Inorganic materials 0.000 description 1
- 239000010949 copper Substances 0.000 description 1
- 238000012864 cross contamination Methods 0.000 description 1
- 238000007405 data analysis Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000003651 drinking water Substances 0.000 description 1
- 235000020188 drinking water Nutrition 0.000 description 1
- 238000000840 electrochemical analysis Methods 0.000 description 1
- 238000000835 electrochemical detection Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000009713 electroplating Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011066 ex-situ storage Methods 0.000 description 1
- 238000002474 experimental method Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000001506 fluorescence spectroscopy Methods 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 230000005802 health problem Effects 0.000 description 1
- 238000003760 magnetic stirring Methods 0.000 description 1
- 229910052748 manganese Inorganic materials 0.000 description 1
- 239000011572 manganese Substances 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- 230000007246 mechanism Effects 0.000 description 1
- 231100000783 metal toxicity Toxicity 0.000 description 1
- 238000012806 monitoring device Methods 0.000 description 1
- 230000000877 morphologic effect Effects 0.000 description 1
- 239000002120 nanofilm Substances 0.000 description 1
- 229910052759 nickel Inorganic materials 0.000 description 1
- 238000001637 plasma atomic emission spectroscopy Methods 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
- 239000011669 selenium Substances 0.000 description 1
- 229910052711 selenium Inorganic materials 0.000 description 1
- 238000003900 soil pollution Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 239000011573 trace mineral Substances 0.000 description 1
- 235000013619 trace mineral Nutrition 0.000 description 1
- 238000004832 voltammetry Methods 0.000 description 1
- 239000011701 zinc Substances 0.000 description 1
- 229910052725 zinc Inorganic materials 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
- G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
Abstract
The invention discloses an automatic detector for heavy metals in water, which comprises a cabinet body, wherein a water sample pretreatment module, a detection module and a control module are arranged in the cabinet body; the water sample pretreatment module comprises a quantitative mixing container which is arranged at the bottom of the cabinet body; the detection module is provided with an electrode slice clamp fixedly arranged in the middle of the cabinet body, a plurality of electrode slice sockets are arranged on the electrode slice clamp in a side-by-side sliding manner, a detection diaphragm is fixedly inserted into each electrode slice socket, the pusher is provided with an electric telescopic rod which extends vertically downwards, the top of each electrode slice socket is provided with a first contactor, and the periphery of each electric telescopic rod is movably sleeved with a second contactor; the control module is provided with a central processing unit. The automatic detector for heavy metals in water can realize integrated automatic detection, and has the advantages of high detection speed, high integration level, safety and reliability.
Description
Technical Field
The invention relates to the technical field of water quality detection. More particularly, the invention relates to an automatic detector for heavy metals in water.
Background
With the development of industry, great convenience is brought to the life of people, but great pollution is also brought to the environment, especially heavy metal pollution, and great threat is brought to the health of people. Heavy metals are generally referred to as having a specific gravity of greater than 5g/cm 3 The metal element with the atomic weight larger than 55, and the main metal element polluted by the heavy metal in the underground water comprises the following components: cr (chromium), mn (manganese), ni (nickel), cu (copper), zn (zinc), as (arsenic), se (selenium), cd (cadmium), hg (mercury), pb (lead), and the like. Heavy metal pollution of groundwater causes soil pollution, so that the content of heavy metal elements in crops exceeds standard, such as cadmium rice. Meanwhile, groundwater is used as an important water source of drinking water, and serious health problems can be caused by exceeding the content of heavy metal elements in the human body after the groundwater is used by the human body, for example, heavy metal Cr, which is a trace element necessary for the human body, can have carcinogenic effect on the human body once exceeding the standard. In short, since the human being is at the top of the food chain, no matter which link of the food chain is polluted by heavy metals, the human being is finally damaged in a irreparable way. One of the biggest problems in environmental detection and protection work is heavy metal pollution, and the heavy metal is free in water for a long time and cannot be decomposed due to the characteristic that the heavy metal is insoluble in water. After a period of accumulation, the water quality is extremely powerful in damage. Therefore, the underground water heavy metal pollution monitoring is necessary, and has great significance for sustainable development of the environment. On one hand, the heavy metal pollution monitoring can provide effective data support for carrying out groundwater pollution protection and treatment, and on the other hand, an effective automatic monitoring means is provided for heavy metal polluted areas.
Currently, methods applied to heavy element measurement and analysis mainly include Atomic Fluorescence Spectrometry (AFS), atomic Absorption Spectrometry (AAS), inductively coupled plasma atomic emission spectrometry (ICP-AES), microwave plasma atomic emission spectrometry (MP-AES), inductively coupled plasma mass spectrometry (ICP-MS), voltammetry (SV), colorimetry (Colorimetry). Among them, electrochemical analysis is a method which has developed faster in recent years, and is also a method which is mainly applied to monitoring heavy metals in water at present. Electrochemical methods have many advantages in measuring heavy metal ions: such as extremely high sensitivity, rapid detection, etc. However, the electrochemical method causes secondary pollution when monitoring and analyzing, which is contrary to the original purpose of developing the online monitoring and researching of heavy metals to a certain extent. In addition, electrochemical methods have some drawbacks to be overcome, such as lengthy electrode preparation and processing steps and the need for precision instruments. Therefore, a heavy metal analysis method which is simple and convenient to operate, low in running cost, free from secondary pollution, wide in analyzable element range, capable of simultaneously monitoring multiple elements and capable of being used for on-line monitoring is urgently needed.
In summary, in the existing technical field of heavy metal detection, in a region with serious groundwater pollution, groundwater heavy metal monitoring is inaccurate in monitoring low-concentration groundwater heavy metal, and the groundwater heavy metal monitoring device has the problems of low sensitivity, poor stability, low automation degree, unreliable remote control and undeveloped data transmission, so that the practical groundwater detection requirement cannot be met. At present, the monitoring of the groundwater environment mainly depends on the mode of site sampling and laboratory analysis to identify the content of pollutants. The collected underground water sample detection is mostly analyzed by adopting large-scale equipment in an ectopic laboratory at present, and the defects of difficult sample transportation, long period, high cost and the like exist. Most portable heavy metal detection equipment is based on an anodic stripping voltammetry, an underground water sample needs to be collected to the ground, and the electrode is subjected to mercury film modification and other steps to detect through adding electrolyte and standard substances, so that only one heavy metal can be detected at a time, the operation is complex, the detection precision is poor, and in-situ detection and morphological analysis of the heavy metal cannot be realized. The heavy metal toxicity of the underground water sample mainly depends on the form of the heavy metal, but the device for detecting the total amount and the form of the in-situ integrated multichannel parallel heavy metal in the portable underground water is not reported yet, and a laser-induced molecular Fluorescence Spectroscopy (LIFs) is expected to realize the function.
In the prior art, as disclosed in Chinese patent application publication No. CN102445488A, an automatic online multi-parameter water quality heavy metal monitor based on an anodic stripping voltammetry method is disclosed, but only comprises one working electrode, a new film is required to be electroplated before each detection, and the old film is required to be erased after the detection, so that the detection efficiency is lower, different samples are easy to pollute, and the detection accuracy is reduced.
Disclosure of Invention
It is an object of the present invention to solve at least the above problems and to provide at least the advantages to be described later.
The invention also aims to provide an automatic detector for heavy metals in water, which is based on a cation stripping voltammetry, realizes the automation of on-line, real-time and continuous monitoring of heavy metals in water, has the advantages of low power consumption, miniaturization and integration, is provided with a plurality of detection diaphragms, can continuously detect a plurality of samples, and greatly improves the detection efficiency.
To achieve these objects and other advantages and in accordance with the purpose of the invention, there is provided an automatic detector for heavy metal in water, comprising a cabinet body in which a water sample pretreatment module, a detection module and a control module are disposed;
the water sample pretreatment module comprises a quantitative mixing container which is arranged at the bottom of the cabinet body;
the detection module is provided with an electrode slice clamp fixedly arranged in the middle of the cabinet body, two mutually parallel horizontal sliding rails are further arranged in the cabinet body, the electrode slice clamp is positioned between the two horizontal sliding rails, the electrode slice clamp, the two horizontal sliding rails and the detection tank are mutually parallel, a pusher and the detection tank communicated with the quantitative mixing container are respectively and slidably arranged on the two horizontal sliding rails, the pusher and the detection tank are positioned on the same vertical surface and are driven by a motor to synchronously slide along the horizontal sliding rails, an injection pump is arranged on a communication pipeline between the quantitative mixing container and the detection tank, a plurality of electrode slice sockets are slidably arranged on the electrode slice clamp side by side, a detection membrane is fixedly inserted in each electrode slice socket, the pusher is provided with an electric telescopic rod extending vertically and downwards, a first contactor is arranged at the top of each electrode slice socket, and a second contactor is movably sleeved on the periphery of the electric telescopic rod;
the control module is provided with a central processing unit which is electrically connected with the quantitative mixing container and used for controlling the suction and pretreatment of the water sample to prepare detection liquid; the quantitative mixing container is electrically connected with the injection pump and used for controlling the injection of the detection liquid into the detection pool; the control pusher and the detection pool move synchronously along the horizontal sliding rail; the electric telescopic rod is electrically connected with the electric telescopic rod, the first contactors and the second contactors, and when the second contactors are contacted with any one of the first contactors, the electric telescopic rod is controlled to extend to push the corresponding electrode plate socket and the corresponding detection membrane to extend downwards into the detection tank and to be immersed into detection liquid.
Preferably, the two horizontal sliding rails are respectively provided with a sliding block connected with the pusher and the detection pool, a connecting piece is fixedly connected between the two sliding blocks, a threaded hole parallel to the two horizontal sliding rails is formed in the connecting piece, a threaded rod is penetrated through the threaded hole in a matched and rotating mode, and the end portion of the threaded rod is fixedly connected with the rotating shaft of the motor in a coaxial mode and is driven to rotate by the motor.
Preferably, a plurality of cylindrical holes penetrating up and down are formed in the electrode sheet clamp, annular limiting edges extending inwards perpendicular to the side walls are arranged at the bottom ends of the inner walls of the holes, a plurality of rectangular openings parallel to each other are formed in the side walls of the electrode sheet clamp and are respectively communicated with the holes in a one-to-one correspondence mode, one side of each contactor exceeds the electrode sheet socket, an extending portion is arranged on the extending portion, the extending portion movably penetrates through the corresponding rectangular opening and is provided with a connecting rod, the connecting rod is matched with the corresponding holes in a sliding mode to be accommodated in, springs are sleeved on the outer peripheries of the bottom ends of the connecting rod, the bottoms of the connecting rod penetrate out of the holes, and the bottom ends of the springs are in limiting butt joint with the annular limiting edges.
Preferably, the first electric signal conducting plate is arranged on each first contactor, the second electric signal conducting plate is arranged on each second contactor, the central processing unit is electrically connected with the first electric signal conducting plates and the second electric signal conducting plates, when the second contactors are contacted with the corresponding first contactors, the first electric signal conducting plates are connected and conducted with the second electric signal conducting plates, the electric telescopic rods extend into the corresponding holes and push the extending parts to move downwards along with the electrode sheet sockets, the corresponding detection diaphragms extend downwards into the detection tanks and are immersed in detection liquid, and electrochemical signals enriched on the detection diaphragms are transmitted to the central processing unit through the signal cables.
Preferably, the control module is further provided with a potentiostat module and a power module which are electrically connected with the central processing unit, the side wall of the cabinet body is provided with a touch screen, a USB interface, an alternating current power interface and a power switch, the touch screen is used as a control operation panel and is electrically connected with the central processing unit, and the power module is electrically connected with the alternating current power interface and the power switch.
Preferably, the cabinet body is also provided with an analysis module and a communication module which are electrically connected with each other, and the analysis module is electrically connected with the central processing unit and is used for receiving electrochemical signals collected by the central processing unit, processing and analyzing the electrochemical signals to form different icon modes, and transmitting the different icon modes to the touch screen for real-time display or transmitting the different icon modes to the remote terminal through the communication module.
Preferably, the top of detecting the pond is provided with open-ended stirring cavity, and the bottom is provided with confined drive cavity, install the carousel through motor drive in the drive cavity, magnet is installed at the top of carousel, place in the stirring cavity with magnet magnetic attraction's rotor.
Preferably, the detection membrane is a disposable mercury-free membrane electrode.
The invention at least comprises the following beneficial effects:
first, the automatic detector for heavy metals in water can realize cyclic detection under the control of the control module, and one cyclic period is about 20min.
The invention adopts the disposable mercury-free diaphragm electrode, a layer of nano film is generated on the working electrode through an in-situ or ex-situ film forming technology, the detection sensitivity and stability are greatly improved, a plurality of detection diaphragms are arranged on the electrode sheet clamp, a plurality of samples can be continuously detected, the detection efficiency is greatly improved, the parallel sample of the samples can be conveniently detected during continuous detection, and the data comparison analysis is carried out.
Thirdly, magnetic stirring is arranged in the detection tank, the stirring speed is controllable, the enrichment time is greatly shortened, and the detection speed is accelerated. Fourth, the automatic detector for heavy metals in water integrates enrichment stirring, electrochemical detection, cleaning and data processing, and has the characteristics of high integration level, safety, reliability and the like.
Fifth, the invention is based on cation stripping voltammetry, realizes the automation of on-line, real-time and continuous monitoring of heavy metals in water, has the advantages of low power consumption, miniaturization and integration, is very suitable for the field of on-site real-time monitoring of heavy metals in water, and has wide application prospect.
Additional advantages, objects, and features of the invention will be set forth in part in the description which follows and in part will become apparent to those having ordinary skill in the art upon examination of the following or may be learned from practice of the invention.
Drawings
FIG. 1 is a schematic diagram of a front structure of the cabinet according to an embodiment of the present invention;
FIG. 2 is a schematic view of the back structure of the cabinet according to an embodiment of the present invention;
FIG. 3 is a schematic structural view of an electrode clip according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of an electrode pad socket according to an embodiment of the present invention.
Detailed Description
The present invention is described in further detail below with reference to the drawings to enable those skilled in the art to practice the invention by referring to the description.
It will be understood that terms, such as "having," "including," and "comprising," as used herein, do not preclude the presence or addition of one or more other elements or groups thereof.
It should be noted that the experimental methods described in the following embodiments, unless otherwise specified, are all conventional methods, and the reagents and materials, unless otherwise specified, are all commercially available; in the description of the present invention, it should be noted that, unless explicitly stated and limited otherwise, the terms "mounted," "connected," and "disposed" are to be construed broadly, and may be fixedly connected, disposed, or detachably connected, disposed, or integrally connected, disposed, for example. The specific meaning of the above terms in the present invention will be understood in specific cases by those of ordinary skill in the art. The terms "transverse," "longitudinal," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used for convenience in describing and simplifying the description of the present invention based on the orientation or positional relationship shown in the drawings, and do not denote or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus are not to be construed as limiting the present invention.
As shown in fig. 1 to 4, the invention provides an automatic detector for heavy metals in water, which comprises a cabinet body 100, wherein a water sample pretreatment module, a detection module and a control module are arranged in the cabinet body 100;
wherein, the water sample pretreatment module comprises a quantitative mixing container 101 which is arranged at the bottom of the cabinet body 100;
the detection module is provided with an electrode slice clamp 102 fixedly arranged in the middle of the cabinet body 100, two mutually parallel horizontal sliding rails 103 are arranged in the cabinet body 100, the electrode slice clamp 102 is positioned between the two horizontal sliding rails 103, the two horizontal sliding rails 103 are mutually parallel, a pusher 104 and a detection pool 105 communicated with the quantitative mixing container 101 are respectively and slidably arranged on the two horizontal sliding rails 103, the pusher 104 and the detection pool 105 are positioned on the same vertical surface and are driven by a motor 113 to synchronously slide along the horizontal sliding rails 103, a syringe pump is arranged on a communication pipeline of the quantitative mixing container 101 and the detection pool 105, a plurality of electrode slice sockets 106 are slidably arranged on the electrode slice clamp 102 side by side, a detection membrane 107 is fixedly inserted in each electrode slice socket 106, a first contactor 109 is arranged on the top of each electrode slice socket 106, and a second contactor 110 is sleeved on the periphery of each electric telescopic rod 108;
the control module is provided with a central processing unit 300 which is electrically connected with the quantitative mixing container 101 and used for controlling the suction and pretreatment of a water sample to prepare detection liquid; the injection pump is electrically connected to control the injection of the detection liquid from the quantitative mixing container 101 into the detection cell 105; the control pusher 104 and the detection pool 105 move synchronously along the horizontal slide rail 103; and the electric telescopic rod 108, the first contactors 109 and the second contactors 110 are electrically connected, and when the second contactors 110 are in contact with any one of the first contactors 109, the electric telescopic rod 108 is controlled to extend and push the corresponding electrode plate socket 106 and the corresponding detection membrane 107 to extend downwards into the detection tank 105 and dip into the detection liquid.
In the technical scheme, the automatic detector for heavy metals in water is provided with a cabinet body 100, and a water sample pretreatment module, a detection module and a control module are arranged in the cabinet body 100. The water sample pretreatment device mainly comprises a quantitative mixing container 101, and the quantitative mixing container 101 is controlled by software to absorb water samples and buffering agents according to the volume ratio of 1:9 so as to prepare detection liquid; the detection module mainly comprises a detection pool 105, a pusher 104, electrode slice clamps 102 and an injection pump, wherein the electrode slice clamps 102 are fixed in the middle of a cabinet body 100, horizontal sliding rails 103 are respectively arranged above and below the electrode slice clamps 102, the two horizontal sliding rails 103 are parallel to the electrode slice clamps 102, the detection pool 105 is slidably mounted on the lower horizontal sliding rail 103, the pusher 104 is slidably mounted on the upper horizontal sliding rail 103, the pusher 104 and the detection pool 105 are positioned on the same vertical surface and synchronously slide along the two horizontal sliding rails 103, the pusher 104 is provided with an electric telescopic rod 108 which extends downwards, a contactor II 110 is movably sleeved on the periphery of the electric telescopic rod 108, a plurality of electrode slice sockets 106 are slidably mounted on one side of the electrode slice clamps 102 side by side, a detection membrane 107 is fixedly inserted at the bottom of each electrode slice socket 106, and a contactor I109 is mounted on the top. The control module mainly comprises a central processing unit 300, and can control water sample injection, water sample pretreatment, detection analysis, waste liquid discharge, and automatic cleaning functions of the quantitative mixing container 101, the detection tank 105 and the pipeline. The cabinet body 100 is internally provided with a liquid storage cylinder for storing water samples, buffering agents, cleaning fluids and other different liquids, and when the cabinet is used, the water samples are extracted by the aid of the water pump assembly and are transmitted and stored in the water sample liquid storage cylinder, and the control module controls the volume ratio of the water samples to be 1:9, water samples and buffering agents enter the quantitative mixing container 101 for water sample pretreatment to prepare detection liquid, then the control module controls the injection pump to pump the detection liquid into the detection pool 105, the motor 113 drives the pusher 104 and the detection pool 105 to move to the position below the leftmost detection membrane 107, the electric telescopic rod 108 stretches to push the detection membrane 107 to be immersed into the detection pool 105, and electrochemical signals enriched on the detection membrane 107 are transmitted to the central processor 300 through the signal cable to finish one-time detection; the electric telescopic rod 108 is shortened, the detection membrane 107 returns to the original position, the motor 113 drives the pusher 104 and the detection tank 105 to move to the next detection membrane 107 for continuous monitoring, and after the work is finished, the cleaning liquid can be sucked and cleaned, and the quantitative mixing container 101 and the detection tank 105 can be controlled. The device detects heavy metal ions in a water body by taking an anodic stripping voltammetry as a mechanism, miniaturizes each step of detection, forms function modularization and mainly comprises a water sample pretreatment module detection module, a control module and an analysis module. Each module is independent of each other and unified in the instrument, and is controlled by computer software, so that automatic operation can be realized, and rapid detection of heavy metal ions in water is realized; the control module controls the pusher 104 and the detection cell 105 to move and detect between different detection diaphragms 107, so as to prevent cross contamination between samples; the electrode slice clamp 102 is provided with a plurality of detection diaphragms 107, so that a plurality of samples can be continuously detected, the detection efficiency is improved, parallel samples of the samples can be detected, data analysis and comparison are performed, and the detection accuracy is improved.
In another technical scheme, two horizontal sliding rails 103 are respectively provided with a sliding block connected with a pusher 104 and a detection pool 105, a connecting piece 111 is fixedly connected between the two sliding blocks, a threaded hole parallel to the two horizontal sliding rails 103 is formed in the connecting piece 111, a threaded rod 112 is penetrated through the threaded hole in a matching rotation manner, the end part of the threaded rod 112 is fixedly connected with a rotating shaft of a motor 113 in a coaxial manner, and the motor 113 drives the threaded rod 112 to rotate. In this technical scheme, the slider that stretches into two horizontal slide rails 103 is fixed respectively to one side of impeller 104 and detection pond 105, the slider can be followed corresponding horizontal slide rail 103 horizontal migration, and the other end of two sliders wears out corresponding horizontal slide rail 103 to connect a connecting piece 111 perpendicularly, offered the screw hole that the level is link up on the connecting piece 111, threaded hole wears to establish the screw rod 112 of matching, screw rod 112, screw hole and two horizontal slide rails 103 are parallel to each other, and motor 113 drive screw rod 112 rotates, can drive connecting piece 111, two sliders and impeller 104 and detection pond 105 and follow two horizontal slide rails 103 synchronous horizontal migration, conveniently promotes different detection diaphragm 107 and move down to detection pond 105, makes this equipment can detect a plurality of samples in succession, improves detection efficiency, also is convenient for survey the parallel appearance of sample, carries out the contrast analysis of data, improves the detection accuracy.
In another technical scheme, a plurality of cylindrical holes 200 penetrating up and down are formed in the electrode sheet clamp 102, annular limiting edges extending inwards perpendicular to the side walls are arranged at the bottom ends of the inner walls of the holes 200, a plurality of rectangular openings parallel to each other are formed in the side walls of the electrode sheet clamp 102 and are respectively communicated with the holes 200 in a one-to-one correspondence mode, an extending portion is arranged on one side of each contactor 109, which exceeds the electrode sheet socket 106, and movably penetrates through the corresponding rectangular opening and is provided with a connecting rod, the connecting rod is matched with the sliding and accommodated in the corresponding hole, springs are sleeved on the outer circumferences of the bottom ends of the connecting rods, the bottoms of the connecting rods 201 penetrate out of the holes 200, and the bottom ends of the springs 202 are in limiting butt joint with the annular limiting edges. In this technical scheme, contactor one and contactor two be alternating current contactor, can produce the magnetic field when being close to each other to certain distance under the circular telegram condition, set up a row of hole 200 that are parallel to each other and vertical extension on the electrode slice clamp 102, make things convenient for electric telescopic handle 108 location to insert, contactor one 109 sets up the extension in inserting hole 200, electric telescopic handle 108 is the same with the structure in the prior art, from top to bottom including intubate and sleeve pipe, the top and the impeller 104 of intubate are connected perpendicularly, contactor two 110 encircles the cover and locates sheathed tube periphery, contactor two can be cylindrical casing, the opening that supplies the intubate to pass is seted up at its top, the bottom is sealed, contactor two's height can be slightly more than sheathed tube height, and be connected with little spring between the interior roof of contactor two and the sheathed tube roof. The connecting rod 201 accommodated in the hole 200 is arranged, the top 201 of the connecting rod can be flush with or slightly exceed the top of the hole, the electric telescopic rod 108 stretches to press the connecting rod to move downwards along the hole 200, and the electric telescopic rod is limited by the spring 202, so that a good buffering and limiting effect is achieved. In the detection process, when the electric telescopic rod and the hole 200 at the top of any electrode slice holder 102 are positioned on the same vertical surface, the first contactor 109 and the second contactor 110 generate magnetic attraction force to enable the first contactor 109 at the top of the connecting rod to slide downwards, at the moment, the central processing unit 300 controls the electrode slice holder 102 to stop transversely moving, the electric telescopic rod stretches, the sleeve pipe downwards presses the connecting rod 201 to drive the electrode slice socket 106 to move downwards, the corresponding detection membrane 107 stretches into the detection pond 105 to carry out detection, after the detection process is completed, the current on the first contactor and the second contactor is disconnected, the second contactor is upwards moved to be separated from the first contactor under the action of the elastic force of the small spring, the electric telescopic rod contracts, the sleeve pipe upwards moves away from the hole, the connecting rod returns to the original position under the action of the spring 202, the first contactor 104 and the second detection pond 105 continue transversely moving, the first contactor and the second contactor are electrified again, the steps are repeated, and the next detection process is completed.
In another technical solution, a first electric signal conducting plate 203 is installed on each first contactor 109, a second electric signal conducting plate 204 is installed on the second contactor 110, the central processing unit 300 is electrically connected with the first electric signal conducting plates and the second electric signal conducting plates, when the second contactor contacts with the corresponding first contactor, the first electric signal conducting plates are connected and conducted with the second electric signal conducting plates, the electric telescopic rod stretches into the corresponding hole and pushes the extending part to move downwards along with the electrode plate socket, the corresponding detection membrane 107 stretches downwards into the detection pool 105 and is immersed in the detection liquid, and electrochemical signals enriched on the detection membrane 107 are transmitted to the central processing unit 300 through the signal cable. In the technical scheme, the first electric signal conducting plate and the second electric signal conducting plate are respectively arranged on the first contactor 109 and the second contactor 110, the first contactor 109 is in contact with the second contactor 110, the first electric signal conducting plate and the second electric signal conducting plate are connected to form a conducting circuit, the electric telescopic rod 108 stretches downwards to push the electrode plate socket 106 to drive the detection membrane 107 to move downwards until the electrode plate socket stretches into the detection pool 105 and is immersed in detection liquid, and a heavy metal detection process is carried out by adopting a cation stripping voltammetry. Through installing contactor one 109 and electric signal conduction board one on different electrode slice sockets 106, make it respectively with electric telescopic handle 108 on contactor two 110, electric signal conduction board two contact UNICOM, conveniently distinguish the electrochemical signal of enrichment of each detection diaphragm 107, prevent information disorder, improve detection efficiency.
In another technical scheme, the control module is further provided with a potentiostat module and a power module which are electrically connected with the central processing unit 300, the side wall of the cabinet body 100 is provided with a touch screen 301, a USB interface, an alternating current power interface and a power switch, the touch screen 301 is used as a control operation panel to be electrically connected with the central processing unit 300, and the power module is electrically connected with the alternating current power interface and the power switch. In this technical solution, the following functions can be automatically implemented by controlling the central processor 300 through the touch screen 301: sample introduction, sample pretreatment, detection analysis, waste liquid discharge and control of the switchable multi-connected electromagnetic valve to realize the automatic cleaning function of the quantitative mixing container 101, the detection tank 105, the pipeline and the like, and has convenient operation and high detection efficiency.
In another technical scheme, an analysis module and a communication module that are electrically connected with each other are further disposed in the cabinet body 100, and the analysis module is electrically connected with the central processing unit 300, and is configured to receive electrochemical signals collected by the central processing unit 300, process and analyze the electrochemical signals to form different icon modes, and transmit the icon modes to the touch screen 301 for real-time display or transmit the icon modes to a remote terminal through the communication module. According to the technical scheme, qualitative and quantitative calculation can be performed on the water sample test result through the analysis module, the result is stored or sent to the remote terminal, and network remote control is achieved.
In another technical scheme, the top of the detection tank 105 is provided with an open stirring cavity, the bottom is provided with a closed driving cavity, a turntable is arranged in the driving cavity through motor driving, a magnet is arranged at the top of the turntable, and a rotor magnetically attracted with the magnet is arranged in the stirring cavity. In this technical scheme, detect pond 105 and electromagnetic stirrer structure are the same, hold in the stirring cavity and wait to detect liquid and magneton, install by motor drive pivoted magnet in the drive cavity, the motor is connected with central processing unit 300, drives the rotor rotation by its control magnet, makes stirring rate controllable simultaneously, shortens enrichment time, improves detection speed.
In another embodiment, the sensing diaphragm 107 is a disposable mercury-free diaphragm electrode. In the technical scheme, the detection membrane 107 adopts the disposable mercury-free membrane electrode, is friendly to human body and environment, and can be detached to replace a new electrode after use, so that repeated electroplating and surface membrane layer erasing are not needed, pollution among different samples is avoided, and the detection accuracy is ensured.
The number of equipment and the scale of processing described herein are intended to simplify the description of the present invention. Applications, modifications and variations of the present invention will be readily apparent to those skilled in the art.
Although embodiments of the present invention have been disclosed above, it is not limited to the details and embodiments shown and described, it is well suited to various fields of use for which the invention would be readily apparent to those skilled in the art, and accordingly, the invention is not limited to the specific details and illustrations shown and described herein, without departing from the general concepts defined in the claims and their equivalents.
Claims (8)
1. The automatic detector for heavy metals in water is characterized by comprising a cabinet body, wherein a water sample pretreatment module, a detection module and a control module are arranged in the cabinet body;
the water sample pretreatment module comprises a quantitative mixing container which is arranged at the bottom of the cabinet body;
the detection module is provided with an electrode slice clamp fixedly arranged in the middle of the cabinet body, two mutually parallel horizontal sliding rails are further arranged in the cabinet body, the electrode slice clamp is positioned between the two horizontal sliding rails, the electrode slice clamp, the two horizontal sliding rails and the detection tank are mutually parallel, a pusher and the detection tank communicated with the quantitative mixing container are respectively and slidably arranged on the two horizontal sliding rails, the pusher and the detection tank are positioned on the same vertical surface and are driven by a motor to synchronously slide along the horizontal sliding rails, an injection pump is arranged on a communication pipeline between the quantitative mixing container and the detection tank, a plurality of electrode slice sockets are slidably arranged on the electrode slice clamp side by side, a detection membrane is fixedly inserted in each electrode slice socket, the pusher is provided with an electric telescopic rod extending vertically and downwards, a first contactor is arranged at the top of each electrode slice socket, and a second contactor is movably sleeved on the periphery of the electric telescopic rod;
the control module is provided with a central processing unit which is electrically connected with the quantitative mixing container and used for controlling the suction and pretreatment of the water sample to prepare detection liquid; the quantitative mixing container is electrically connected with the injection pump and used for controlling the injection of the detection liquid into the detection pool; the control pusher and the detection pool move synchronously along the horizontal sliding rail; the electric telescopic rod is electrically connected with the electric telescopic rod, the first contactors and the second contactors, and when the second contactors are contacted with any one of the first contactors, the electric telescopic rod is controlled to extend to push the corresponding electrode plate socket and the corresponding detection membrane to extend downwards into the detection tank and to be immersed into detection liquid.
2. The automatic detector for heavy metals in water according to claim 1, wherein the two horizontal sliding rails are respectively provided with a sliding block connected with the pusher and the detection tank, a connecting piece is fixedly connected between the two sliding blocks, the connecting piece is provided with a threaded hole parallel to the two horizontal sliding rails, a threaded rod is penetrated through the threaded hole in a matched rotation manner, and the end part of the threaded rod is coaxially fixedly connected with a rotating shaft of the motor and is driven by the motor to rotate.
3. The automatic detector for heavy metal in water according to claim 1, wherein a plurality of cylindrical holes penetrating up and down are formed in the electrode sheet clamp, annular limiting edges extending inwards perpendicular to the side walls are arranged at the bottom ends of the inner walls of the holes, a plurality of mutually parallel rectangular openings are formed in the side walls of the electrode sheet clamp and are respectively communicated with the holes in a one-to-one correspondence mode, an extension part is arranged on one side of each contactor beyond the electrode sheet socket, the extension part movably penetrates through the corresponding rectangular opening and is provided with a connecting rod, the connecting rod is matched and slidingly accommodated in the corresponding hole, springs are sleeved on the peripheries of the bottom ends of the connecting rods, the bottoms of the connecting rods penetrate out of the holes, and the bottoms of the springs are in limiting abutting connection with the annular limiting edges.
4. The automatic detector for heavy metal in water according to claim 3, wherein the first electric signal conducting plate is arranged on each contactor, the second electric signal conducting plate is arranged on each contactor, the central processing unit is electrically connected with the first electric signal conducting plates and the second electric signal conducting plates, when the second contactor is in contact with the corresponding first contactor, the first electric signal conducting plates are connected and conducted with the second electric signal conducting plates, the electric telescopic rods extend into corresponding holes and push the extending parts to move downwards together with the electrode sheet sockets, the corresponding detection diaphragms extend downwards into the detection tanks and are immersed in detection liquid, and electrochemical signals enriched on the detection diaphragms are transmitted to the central processing unit through the signal cables.
5. The automatic detector for heavy metal in water according to claim 4, wherein the control module is further provided with a potentiostat module and a power supply module which are electrically connected with the central processing unit, the side wall of the cabinet body is provided with a touch screen, a USB interface, an alternating current power supply interface and a power supply switch, the touch screen is used as a control operation panel and is electrically connected with the central processing unit, and the power supply module is electrically connected with the alternating current power supply interface and the power supply switch.
6. The automatic detector for heavy metals in water according to claim 5, wherein the cabinet body is further provided with an analysis module and a communication module which are electrically connected with each other, the analysis module is electrically connected with the central processing unit and is used for receiving electrochemical signals collected by the central processing unit, processing and analyzing the electrochemical signals to form different icon modes, and transmitting the icon modes to the touch screen for real-time display or transmitting the icon modes to the remote terminal through the communication module.
7. The automatic detector for heavy metals in water according to claim 1, wherein an open stirring cavity is arranged at the top of the detection tank, a closed driving cavity is arranged at the bottom of the detection tank, a rotary table is arranged in the driving cavity through motor driving, a magnet is arranged at the top of the rotary table, and a rotor magnetically attracted with the magnet is arranged in the stirring cavity.
8. The automatic detector for heavy metals in water as claimed in claim 1, wherein said detection membrane is a disposable mercury-free membrane electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311769033.8A CN117538393A (en) | 2023-12-21 | 2023-12-21 | Automatic detector for heavy metal in water |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311769033.8A CN117538393A (en) | 2023-12-21 | 2023-12-21 | Automatic detector for heavy metal in water |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117538393A true CN117538393A (en) | 2024-02-09 |
Family
ID=89788196
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311769033.8A Pending CN117538393A (en) | 2023-12-21 | 2023-12-21 | Automatic detector for heavy metal in water |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117538393A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110284395A1 (en) * | 2008-04-04 | 2011-11-24 | Millipore Corporation | Simultaneous Electrochemical Detection of Multiple Heavy Metal Ions in Liquid |
| CN111220599A (en) * | 2018-11-24 | 2020-06-02 | 朱燕超 | Sampling device and sampling method for water quality detection |
| CN213780065U (en) * | 2020-10-28 | 2021-07-23 | 北京欧仕科技有限公司 | Automatic water quality monitor |
| CN216816533U (en) * | 2021-11-23 | 2022-06-24 | 武汉中科志康生物科技有限公司 | Be applied to automatic rising detection mechanism of heavy metal detection |
| WO2023079322A2 (en) * | 2021-11-04 | 2023-05-11 | Water Minilab Kft. | Water analysing device, the system associated with it, and its use |
| CN219224667U (en) * | 2022-12-23 | 2023-06-20 | 广东大能环保科技有限公司 | Water quality detection test bed |
| CN219657661U (en) * | 2023-03-23 | 2023-09-08 | 武汉力合科技有限公司 | Multichannel detection system |
-
2023
- 2023-12-21 CN CN202311769033.8A patent/CN117538393A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20110284395A1 (en) * | 2008-04-04 | 2011-11-24 | Millipore Corporation | Simultaneous Electrochemical Detection of Multiple Heavy Metal Ions in Liquid |
| CN111220599A (en) * | 2018-11-24 | 2020-06-02 | 朱燕超 | Sampling device and sampling method for water quality detection |
| CN213780065U (en) * | 2020-10-28 | 2021-07-23 | 北京欧仕科技有限公司 | Automatic water quality monitor |
| WO2023079322A2 (en) * | 2021-11-04 | 2023-05-11 | Water Minilab Kft. | Water analysing device, the system associated with it, and its use |
| CN216816533U (en) * | 2021-11-23 | 2022-06-24 | 武汉中科志康生物科技有限公司 | Be applied to automatic rising detection mechanism of heavy metal detection |
| CN219224667U (en) * | 2022-12-23 | 2023-06-20 | 广东大能环保科技有限公司 | Water quality detection test bed |
| CN219657661U (en) * | 2023-03-23 | 2023-09-08 | 武汉力合科技有限公司 | Multichannel detection system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US7897032B2 (en) | Method and apparatus for stripping voltammetric and potentiometric detection and measurement of contamination in liquids | |
| US20210208033A1 (en) | Diffusive gradients in thin films (dgt) test device for lake water and test method using same | |
| CN107091875B (en) | A kind of hand-held aspiration-type electrochemical detection device automatically processing sample | |
| KR100955710B1 (en) | On-line analysis system for heavy metal using a electrochemical method | |
| CN103076381A (en) | Anodic stripping voltammetric mechanism-based online automatic monitoring system for heavy metal ions in water | |
| CN102037350B (en) | The simultaneous electrochemical of multiple heavy metal ions in liquid detects | |
| Milani et al. | Development and application of a microfluidic in-situ analyzer for dissolved Fe and Mn in natural waters | |
| Intarakamhang et al. | Robotic heavy metal anodic stripping voltammetry: ease and efficacy for trace lead and cadmium electroanalysis | |
| CN203484166U (en) | Microfluidic chip for environmental monitoring | |
| CN219757769U (en) | Soil heavy metal pollution detects evaluation device | |
| CN203672824U (en) | Integrated electrochemical heavy metal detection sensor with stirring function | |
| EP4019956A1 (en) | Renewable mercury meniscus electrode with mercury circulation system and contaminant removal | |
| CN201177613Y (en) | Sea water heavy metal pollutant on site analyzer | |
| CN117538393A (en) | Automatic detector for heavy metal in water | |
| CN115046979A (en) | Polycyclic aromatic hydrocarbon ocean in-situ monitor, monitoring method and application thereof | |
| CN204945085U (en) | Portable underground blow-off line water monitoring device | |
| CN109406593A (en) | Electrochemical in-situ reacts X ray test device | |
| CN202837226U (en) | Portable cadmium and lead detector | |
| CN109596680A (en) | A kind of detector of real time on-line monitoring contents of many kinds of heavy metal ion | |
| CN109781953A (en) | A kind of COD analyzer | |
| CN114644371A (en) | AI-based sewage treatment visual early warning system and sewage treatment supervision method | |
| CN112730295A (en) | Full-automatic portable ultraviolet oil measurement device and oil measurement method | |
| CN214750249U (en) | Water quality monitoring device based on Internet of things | |
| CN219142322U (en) | Floating device for sampling | |
| CN202562883U (en) | Electrochemical sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |