CN104181319A - Cadmium column reduction detection device for full-automatic chemical analyzer - Google Patents
Cadmium column reduction detection device for full-automatic chemical analyzer Download PDFInfo
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- CN104181319A CN104181319A CN201410458646.4A CN201410458646A CN104181319A CN 104181319 A CN104181319 A CN 104181319A CN 201410458646 A CN201410458646 A CN 201410458646A CN 104181319 A CN104181319 A CN 104181319A
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Abstract
The invention discloses a cadmium column reduction detection device for a full-automatic chemical analyzer, belonging to the technical field of biochemical equipment. The cadmium column reduction detection device is characterized in that a three-way valve is arranged between a sampling needle and a common connecting pipe; a three-way valve is arranged between a plunger pump and the common connecting pipe; a cadmium column is communicated with the two three-way valves; and a vacuum pump is respectively communicated with the sampling needle, a liquid path cleaning solution tank and a cadmium column cleaning solution tank through the three-way valves. The cadmium column reduction detection device has the beneficial effects that the full-automatic chemical analyzer can realize nitrate detection by adopting a cadmium column reduction method, the detection capacity of the chemical analyzer is improved, and the automatic detection process of the cadmium column reduction method is realized. The detection device has the advantages of simplicity in operation and accuracy in detection and is particularly suitable for detecting seawater, drinking water and other water with low nitrate content.
Description
Technical field
The invention belongs to chemical analysis apparatus technical field, relate to a kind of improvement for the low water quality detecting device of the nitrate content such as seawater, potable water.
Background technology
Full-automatic chemical analyser is the instrument for surface water, seawater, sewage, soil/plant extraction liquid liquid etc. being carried out to quantitative determination and analysis, the content that can detect the various ingredients such as nitrate in above-mentioned sample, nitrite, ammonia nitrogen, phosphate, potassium ion is the important references data that sample chemical composition is assessed.Full-automatic chemical analyser is the multidisciplinary analysis technology that integrates chemistry in the present age, optics, stoichiometry and computer technology.
Nitrate nitrogen is the final oxidation product of organic compounds containing nitrogen in water body, and the nitrate in potable water can produce carcinogenesis to human body, is an important contamination index.Azotate pollution in environment is mainly derived from nitrogenous discarded object etc. in nitrate use, sanitary sewage, house refuse, production.Nitrate nitrogen is also one of plant and extra large hydroplankton and algal grown, the requisite nutrient of breeding, the nitrate nitrogen of excessive concentrations can cause surface water, ocean water body eutrophication, bring thus lake wawter bloom or red tide of sea, threaten lake and marine ecosystems.Therefore the nitrate concentration in surface water and ocean water body is monitored and had very important significance.The nitrate nitrogen of measuring in fresh water and seawater at present mainly adopts Cadmium column reduction method, Main Basis GB5750-2006 " the drinking water standard method of inspection " and GB37178-2007 " ocean salt monitoring specification ".In existing GB, cadmium reducing process adopts manual method operation, and operating personnel's health is had to injury to a certain degree, and loaded down with trivial details, the consuming time length of operating process, is difficult to ensure the reappearance of experimental result, is not suitable for carrying out batch quantity analysis.Existing full-automatic chemical analytical instrument is to simplify testing process mostly to adopt hydrazine sulfate that the nitrate reduction in sample is become to nitrite, then carries out colorimetric determination.Although the method is simple to operate, excessive hydrazine sulfate can produce over reduction to the extremely low sample of the nitrate concentration such as seawater, pure water, causes testing result inaccurate.
Summary of the invention
The object of the invention is: provide a kind of Cadmium column reduction pick-up unit for full-automatic chemical analyser, and Cadmium column reduction method is due to highly sensitive, good stability is therefore applicable to the detection of nitrate in low concentration sample very much.
Technical scheme of the present invention is: between sampling probe and generic connectivity pipe, be provided with T-valve, between ram pump and generic connectivity pipe, be provided with T-valve, cadmium post is communicated with two T-valve, and vacuum pump is communicated with sampling probe Ji Ye road cleaning fluid tank and cadmium post cleaning fluid tank respectively by T-valve.
The invention has the beneficial effects as follows: can realize full-automatic chemical analyser and adopt Cadmium column reduction method to carry out nitrate detection, in promoting chemical analyzer detectability, realize the automation process that Cadmium column reduction method detects.Have simple to operate, detect accurately, be adapted to especially the water quality detection low to the nitrate content such as seawater, potable water.
Brief description of the drawings
Fig. 1 is structured flowchart of the present invention.
Embodiment
Embodiment 1
Below in conjunction with accompanying drawing, the present invention is described further:
As shown in the figure, the 1st, sampling probe, the 2nd, T-valve A, the 3rd, generic connectivity pipe, the 4th, cadmium post, the 5th, T-valve B, the 6th, ram pump, the 7th, solenoid valve, the 8th, vacuum pump, the 9th, T-valve C, the 10th, sampling probe Ji Ye road cleaning fluid tank, the 11st, cadmium post cleaning fluid tank.
Cadmium column reduction detection system is passed through the redesign of liquid road part on the basis of existing full-automatic chemical analyser, cadmium post is incorporated in liquid road, in the time need to adopting Cadmium column reduction method to detect, sample to be tested is introduced to cadmium pole unit realizes the reduction to sample to be tested by controlling corresponding solenoid valve and ram pump.After measurement finishes by control the solenoid valve of ram pump rear end and T-valve and vacuum pump extract (liquid) realize to cadmium post cleaning.After end, control again corresponding solenoid valve and be switched to normalization Epidemiological Analysis pipeline, carry out sundry item measurement.
First according to the project settings of instrument, be need to adopt Cadmium column reduction to detect time when determining current carried out test event, first getting a certain amount of sample by specimen needle (not embodying in this patent) is put in reaction utensil (not embodying in this patent), the pipeline 202 and 203 that instrument main control unit control T-valve A2 realizes T-valve A2 inside is communicated with, controls T-valve B5 realizes 502 and 503 of T-valve B5 inside and is communicated with, and has realized the intercommunication of sampling probe 1, ram pump 6,4 three unit of cadmium post.In the time starting to carry out restoring operation, sampling probe 1 is immersed in sample to be tested, and the piston in ram pump 6 moves down sample to be tested is slowly drawn in cadmium post 4, and sampling probe 1 lifts, and ram pump 4 continues to move makes all liq all flow through cadmium post 4.Piston in ram pump 6 moves up sample to be tested is slowly discharged in reaction utensil (not embodying in this patent).Can set repeatedly and to carry out the process of repeatedly drawing sample to be tested and entering cadmium post according to the length of detection method and cadmium post, thereby improve reducing power.After reduction completes, sampling probe 1 moves to instrument cleaning position (not embodying in this patent), master control borad control solenoid valve 7 is opened, and controls T-valve C9, and 902 of T-valve C9 inside is communicated with 903, vacuum pump 8 is worked, and the cleaning fluid of pump cadmium post cleaning fluid tank 11 cleans cadmium post.After cleaning finishes, the pipeline 201 and 203 that instrument main control unit control T-valve 2 is realized T-valve inside is communicated with, controls T-valve 5 to be realized 501 and 503 of T-valve inside and is communicated with, and has realized the intercommunication of sampling probe 1, ram pump 6,3 three unit of generic connectivity pipe.Master control borad control solenoid valve 7 is opened, and controls T-valve C9, and 901 of T-valve C9 inside is communicated with 903, and vacuum pump 8 is worked, and the cleaning fluid in sampling probe Ji Ye road cleaning fluid tank 10 cleans pipeline.After cleaning finishes, carry out again the reagent such as developer and add, realize the detection to sample to be tested.
Claims (1)
1. the Cadmium column reduction pick-up unit for full-automatic chemical analyser, comprise sampling probe, generic connectivity pipe, ram pump, vacuum pump, it is characterized in that: between sampling probe and generic connectivity pipe, be provided with T-valve, between ram pump and generic connectivity pipe, be provided with T-valve, cadmium post is communicated with two T-valve, and vacuum pump is communicated with sampling probe Ji Ye road cleaning fluid tank and cadmium post cleaning fluid tank respectively by T-valve.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458646.4A CN104181319A (en) | 2014-09-11 | 2014-09-11 | Cadmium column reduction detection device for full-automatic chemical analyzer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410458646.4A CN104181319A (en) | 2014-09-11 | 2014-09-11 | Cadmium column reduction detection device for full-automatic chemical analyzer |
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| Publication Number | Publication Date |
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| CN104181319A true CN104181319A (en) | 2014-12-03 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201410458646.4A Pending CN104181319A (en) | 2014-09-11 | 2014-09-11 | Cadmium column reduction detection device for full-automatic chemical analyzer |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910865A (en) * | 2016-04-20 | 2016-08-31 | 河北科技大学 | Apparatus for reducing nitrates in measurement process of total nitrogen in water and achievement method of same |
| WO2021098396A1 (en) * | 2019-11-18 | 2021-05-27 | 深圳迈瑞生物医疗电子股份有限公司 | Sample analyzer and sample analysis method |
| CN112945641A (en) * | 2021-02-03 | 2021-06-11 | 中国科学院苏州生物医学工程技术研究所 | Rotary sampling device |
| CN114755388A (en) * | 2022-06-15 | 2022-07-15 | 自然资源部第二海洋研究所 | Spiral copper-cadmium reduction device and method for seawater nitrate online analysis |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK156927B (en) * | 1987-06-23 | 1989-10-16 | Sven Erik Lykke | Method and apparatus for automatic analysis of liquids |
| CN103900986A (en) * | 2014-03-24 | 2014-07-02 | 山东省科学院海洋仪器仪表研究所 | Ultraviolet light reduction-spectrophotometric method-based device and method for measuring concentration of nitrate in seawater online |
| CN203720190U (en) * | 2014-03-06 | 2014-07-16 | 深圳市朗诚实业有限公司 | Automatic detection device of nitrate cadmium column |
| CN204116363U (en) * | 2014-09-11 | 2015-01-21 | 长春星锐智能化科技有限公司 | A kind of Cadmium column reduction pick-up unit for full-automatic chemical analyser |
-
2014
- 2014-09-11 CN CN201410458646.4A patent/CN104181319A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DK156927B (en) * | 1987-06-23 | 1989-10-16 | Sven Erik Lykke | Method and apparatus for automatic analysis of liquids |
| CN203720190U (en) * | 2014-03-06 | 2014-07-16 | 深圳市朗诚实业有限公司 | Automatic detection device of nitrate cadmium column |
| CN103900986A (en) * | 2014-03-24 | 2014-07-02 | 山东省科学院海洋仪器仪表研究所 | Ultraviolet light reduction-spectrophotometric method-based device and method for measuring concentration of nitrate in seawater online |
| CN204116363U (en) * | 2014-09-11 | 2015-01-21 | 长春星锐智能化科技有限公司 | A kind of Cadmium column reduction pick-up unit for full-automatic chemical analyser |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105910865A (en) * | 2016-04-20 | 2016-08-31 | 河北科技大学 | Apparatus for reducing nitrates in measurement process of total nitrogen in water and achievement method of same |
| WO2021098396A1 (en) * | 2019-11-18 | 2021-05-27 | 深圳迈瑞生物医疗电子股份有限公司 | Sample analyzer and sample analysis method |
| CN114556082A (en) * | 2019-11-18 | 2022-05-27 | 深圳迈瑞生物医疗电子股份有限公司 | Sample analyzer and sample analyzing method |
| CN114585901A (en) * | 2019-11-18 | 2022-06-03 | 深圳迈瑞生物医疗电子股份有限公司 | Sample analyzer and sample analyzing method |
| CN112945641A (en) * | 2021-02-03 | 2021-06-11 | 中国科学院苏州生物医学工程技术研究所 | Rotary sampling device |
| CN114755388A (en) * | 2022-06-15 | 2022-07-15 | 自然资源部第二海洋研究所 | Spiral copper-cadmium reduction device and method for seawater nitrate online analysis |
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Application publication date: 20141203 |