CN105277552B - A kind of device and its application method for azo colouring agent on-line checking - Google Patents
A kind of device and its application method for azo colouring agent on-line checking Download PDFInfo
- Publication number
- CN105277552B CN105277552B CN201510792863.1A CN201510792863A CN105277552B CN 105277552 B CN105277552 B CN 105277552B CN 201510792863 A CN201510792863 A CN 201510792863A CN 105277552 B CN105277552 B CN 105277552B
- Authority
- CN
- China
- Prior art keywords
- reagent
- pump housing
- diazo
- reagent bottle
- reaction device
- 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.)
- Active
Links
Landscapes
- Investigating Or Analyzing Non-Biological Materials By The Use Of Chemical Means (AREA)
- Investigating Or Analysing Materials By The Use Of Chemical Reactions (AREA)
- Automatic Analysis And Handling Materials Therefor (AREA)
Abstract
The present invention relates to a kind of devices and its application method for azo colouring agent on-line checking, including constant flow pump transport system, reduction reaction system, diazo-reaction system, chromogenic reaction system and detecting system.The present invention passes through on-line control reagent addition sequence and equivalent, accurately control reaction, realize online thermal reduction, diazotising and the chromogenic reaction of azo agents, reaction system may be implemented in aubergine spectrum range and directly detect, it is easy to operate, sensitive, not only increase analysis efficiency height, result is stablized, also avoid in colorant that such as Basic Orange light color colorant can be applied to the automated analysis of azo colouring agent total amount in sample to be tested because of the limitation that itself absorptivity is small and causes detection sensitivity relatively low.
Description
Technical field
The present invention relates to a kind of devices and its application method for azo colouring agent on-line checking.
Background technology
Azo colouring agent carcinogenicity is strong, toxicity is big, and harm is big, is classified as key monitoring object for countries in the world.In recent years,
The non-edible industrial dye/pigment such as tonyred, para red, Basic Orange adds in Misuse, tealeaves in violation of rules and regulations in process of production
Green azo dyes etc. frequently occurs.How in market circulation food that may be present azo colouring agent is quickly and efficiently monitored,
Have become whole society's focus of attention problem.
The assay method of azo colouring agent mainly has spectrophotometry, chromatography.In single azo colouring agent context of detection,
Using colorimetric determination, simple and fast is analyzed.Using high performance liquid chromatography, gas chromatography-mass spectrometry, liquid chromatogram-
Mass spectrum/mass spectrography, method accuracy is high, and involved equipment is expensive and operation requires height, and sample treatment is complex, in market
It is difficult to effectively be applied in quick circulation systems.In terms of colorimetric detection, it is based primarily upon pigment self color and is visually divided
Analysis, has polycaprolactam method, liquid-liquid distribution method using more method, easy to operate, and recovery rate is high, can detect lemon yellow, red
The colorants such as the red amaranth of moss and famille rose, but operating process is cumbersome, the time is tediously long, it is difficult to high throughput is obtained in practice certainly
Dynamicization is applied.There is an urgent need for research and develop simple and practical azo colouring agent on-line measuring device.
Invention content
In view of this, the purpose of the present invention is to provide a kind of device for azo colouring agent on-line checking and its uses
Method realizes the automated analysis of azo colouring agent total amount in sample to be tested.
To achieve the above object, the present invention adopts the following technical scheme that：A kind of dress for azo colouring agent on-line checking
It sets, it is characterised in that：It is anti-including sequentially connected constant flow pump transport system, reduction reaction system, diazo-reaction system, colour developing
Answer system and colorimetric assay system.
Further, the constant flow pump transport system include one equipped with distilled water reagent bottle, one be equipped with buffer examination
Agent bottle, one reagent bottle and one equipped with go back original reagent are equipped with the reagent bottle of sample to be tested；Reagent bottle, the dress equipped with distilled water
There are the reagent bottle, the reagent bottle equipped with go back original reagent and the reagent bottle equipped with sample to be tested of buffer respectively through a pump housing and one or four
Port valve connects.
Further, the reduction reaction system includes that an electronic temperature control device and one are set in the electronic temperature control device
The input terminal of reduction reactor, the reduction reactor is connected with that four-way valve.
Further, the diazo-reaction system include a cooler, the cooler respectively with the reduction reaction
The output end of device and diazo-reaction device connection, the diazo-reaction device are also equipped with acid reagent through a pump housing and one respectively
Reagent bottle and one equipped with diazo reagent reagent bottle connect.
Further, the chromogenic reaction system includes a chromogenic reaction device, the chromogenic reaction device and the diazotising
Reactor connects, and the chromogenic reaction device is also respectively through the reagent bottle of a pump housing and one equipped with masking reagent and one equipped with colour developing examination
The reagent bottle of agent connects.
Further, the colorimetric assay system includes a detection cell, and a colorimetric detector is provided in the detection cell,
The colorimetric detector is connect with a signal acquisition process terminal.
The detection method of a kind of device for azo colouring agent on-line checking, it is characterised in that include the following steps：
Step S1：Configure buffer reagent, go back original reagent, acid reagent, diazo reagent, masking reagent and colour reagent；
Step S2：Each reagent of distilled water, sample to be tested, step S1 configurations is injected into corresponding reagent bottle；
Step S3：Start the corresponding pump housing and test sample by the buffer solution, go back original reagent and is waited for the flow velocity of 1.0mL/min
Product input four-way valve is mixed, and stops the pump housing after 10 seconds；
Step S4：The electronic temperature control device heating temperature is controlled to send to 70 degrees Celsius, while by the mixed liquor in four-way valve
Enter in the reduction reactor and reacts 10min；
Step S5：Start the pump housing being connect with the reagent bottle equipped with distilled water, pushes the mixed liquor warp in reduction reactor
The cooler stops the pump housing after rapidly entering the diazo-reaction device；Then it is respectively started and the reagent equipped with acid reagent
Bottle and equipped with diazo reagent reagent bottle connection the pump housing, noted into the diazo-reaction device with the flow velocity of 1.0mL/min
Enter sulphate reagent and diazo reagent, stop the pump housing after 10 seconds and reacts 3min；
Step S6：Start the pump housing being connect with the reagent bottle equipped with distilled water, pushes the mixed liquor in diazo-reaction device
Stop the pump housing after rapidly entering the chromogenic reaction device；Then start the pump housing being connect with the reagent bottle equipped with masking reagent, with
The flow velocity of 1.0mL/min injects masking reagent into the chromogenic reaction device, stops the pump housing after 10 seconds and reacts 3min；Then it opens
The dynamic pump housing being connect with the reagent bottle equipped with colour reagent is injected into the chromogenic reaction device with the flow velocity of 1.0mL/min and is shown
Color reagent stops the pump housing and reacts 15min after 10 seconds；
Step S7：Start the pump housing being connect with the reagent bottle equipped with distilled water, the mixed liquor in chromogenic reaction device is conveyed
Into detection cell, online colorimetric analysis is carried out by colorimetric detector and signal acquisition process terminal-pair mixed liquor and obtains sample to be tested
The content of middle azo colouring agent.
Further, the buffer reagent is the citrate solution of pH=6.0, and the go back original reagent is 0.20mol/L's
Hydrogensulfite solution, the acid reagent are the sulfuric acid solution of 0.10mol/L, and the diazo reagent is that mass content is
5% nitrite natrium solution, the masking reagent are the sulfamic acid amine aqueous solutions that mass content is 2.5%, and the colour reagent is
The N- that mass content is 2%（1- naphthalenes）Ethylenediamine-hydrochloride solution.
The present invention has the advantages that compared with prior art：The present invention can automate the online thermocatalytic of progress and connect two
Sodium sulphate restores azo colouring agent, and the control input pump housing makes the reaction solution that reaction reaches a certain level rapidly enter diazonium successively
Change and chromogenic reaction system improve the molar absorption coefficient of azo colouring agent, realize that reaction system is straight in aubergine spectrum range
Sensitive analysis is connect, the present invention is based on online conveying and online reaction control systems, pass through on-line control reaction reagent addition sequence
And equivalent, accurately control the reaction of differential responses system, it is easy to operate, efficient, avoid conventional colorimetric analysis in sample heating,
The problems such as factors such as cooling, reagent addition cause reaction unstability improves analysis efficiency height, result stabilization, also avoids
Such as Basic Orange light color colorant divides because of the limitation that itself absorptivity is small and causes detection sensitivity relatively low in colorant
Analyse it is efficient, detection it is sensitive, can be applied to the automated analysis of azo colouring agent total amount in sample to be tested.
Description of the drawings
Fig. 1 is the apparatus structure schematic diagram of one embodiment of the invention.
In figure：1- is equipped with the reagent bottle of distilled water；2- is equipped with the reagent bottle of buffer reagent；3- is equipped with the reagent of go back original reagent
Bottle；4- is equipped with the reagent bottle of sample to be tested；5- contains the reagent bottle of acid reagent；6- contains the reagent bottle of diazo reagent；7-
Contain the reagent bottle of masking reagent；8- contains the reagent bottle of colour reagent；The 9- pump housings；10- four-way valves；11- electronic temperature control devices；
12- reduction reactors；13- coolers；14,15,17, the 18- pump housings；16- diazo-reaction devices；19- chromogenic reaction devices；20- ratios
Color detecting system.
Specific implementation mode
The present invention will be further described with reference to the accompanying drawings and embodiments.
Fig. 1 is please referred to, the present embodiment provides a kind of device for azo colouring agent on-line checking, including it is sequentially connected
Constant flow pump transport system, reduction reaction system, diazo-reaction system, chromogenic reaction system and colorimetric assay system 20.
In this present embodiment, the constant flow pump transport system includes that a reagent bottle 1, one equipped with distilled water is equipped with buffer
Reagent bottle 2, one equipped with go back original reagent reagent bottle 3 and one be equipped with sample to be tested reagent bottle 4；The examination equipped with distilled water
Agent bottle 1, the reagent bottle 2 equipped with buffer, the reagent bottle 3 equipped with go back original reagent and the reagent bottle equipped with sample to be tested 4 pass through respectively
One pump housing 9 is connect with a four-way valve 10.
In this present embodiment, the reduction reaction system is set to the electron temperature-control including an electronic temperature control device 11 and one
Reduction reactor 12 in device 11, the input terminal of the reduction reactor 12 are connect with the four-way valve 10.
In this present embodiment, the diazo-reaction system include a cooler 13, the cooler 13 respectively with it is described
The output end of reduction reactor 12 and a diazo-reaction device 16 connection, the diazo-reaction device 16 are equipped with through the pump housing 14 with one
The reagent bottle 5 of acid reagent connects, and the diazo-reaction device 16 connects through reagent bottle 6 of the pump housing 15 and one equipped with diazo reagent
It connects.
In this present embodiment, the chromogenic reaction system includes a chromogenic reaction device 19, the chromogenic reaction device 19 and institute
The connection of diazo-reaction device 16 is stated, the chromogenic reaction device 19 is connect through the pump housing 17 with a reagent bottle 7 equipped with masking reagent, institute
Chromogenic reaction device 19 is stated to connect with a reagent bottle 8 equipped with colour reagent through the pump housing 18.
In this present embodiment, the colorimetric assay system includes a detection cell, and colorimetric inspection is provided in the detection cell
Device is surveyed, the colorimetric detector is connect with a signal acquisition process terminal, and the signal acquisition process terminal is Integrated Light telecommunications
The terminal handler of number acquisition, processing, including control chip, display and data control button.
The present embodiment also provides a kind of detection method of the device for azo colouring agent on-line checking, it is characterised in that packet
Include following steps：
Step S1：Configure buffer reagent, go back original reagent, acid reagent, diazo reagent, masking reagent and colour reagent；
The wherein described buffer reagent is the citrate solution of pH=6.0, and the go back original reagent is the sodium dithionite of 0.20mol/L
Solution, the acid reagent are the sulfuric acid solution of 0.10mol/L, and the diazo reagent is the nitrite natrium that mass content is 5%
Solution, the masking reagent are the sulfamic acid amine aqueous solutions that mass content is 2.5%, and the colour reagent is that mass content is 2%
N-（1- naphthalenes）Ethylenediamine-hydrochloride solution；
Step S2：Each reagent of distilled water, sample to be tested, step S1 configurations is injected into corresponding reagent bottle；
Step S3：Start the corresponding pump housing and test sample by the buffer solution, go back original reagent and is waited for the flow velocity of 1.0mL/min
Product input four-way valve 10 is mixed, and stops the pump housing after 10 seconds；
Step S4：11 heating temperature of the electronic temperature control device is controlled to 70 degrees Celsius, while by the mixing in four-way valve 10
Liquid, which is sent into the reduction reactor 12, reacts 10min, and the reduction reactor 12 is spiral type reactor；
Step S5：Start the pump housing 9 being connect with the reagent bottle 1 equipped with distilled water, pushes the mixing in reduction reactor 12
Liquid stops the pump housing 9 after the cooler 13 rapidly enters the diazo-reaction device 16；Then it is respectively started and acidity is housed
The pump housing 14 of the reagent bottle 5 of reagent and equipped with diazo reagent 6 reagent bottle connection the pump housing 15, with the flow velocity of 1.0mL/min
Sulphate reagent and diazo reagent are injected into the diazo-reaction device 16, stop the pump housing after 10 seconds and react 3min；
Step S6：Start the pump housing 9 being connect with the reagent bottle 1 equipped with distilled water, pushes mixed in diazo-reaction device 16
It closes after liquid rapidly enters the chromogenic reaction device 19 and stops the pump housing 9；Then startup is connect with the reagent bottle 7 equipped with masking reagent
The pump housing 17 injects masking reagent into the chromogenic reaction device 19 with the flow velocity of 1.0mL/min, and it is simultaneously anti-to stop the pump housing 17 after 10 seconds
Answer 3min；Then start the pump housing 18 being connect with the reagent bottle 8 equipped with colour reagent, shown toward described with the flow velocity of 1.0mL/min
Colour reagent is injected in colour response device 19, stops the pump housing 18 after 10 seconds and reacts 15min；
Step S7：Start the pump housing 9 being connect with the reagent bottle equipped with distilled water 1, by the mixed liquor in chromogenic reaction device 19
Detection cell is delivered into, is obtained by colorimetric detector and the online colorimetric analysis of signal acquisition process terminal-pair mixed liquor progress to be measured
The content of azo colouring agent in sample.
The foregoing is merely presently preferred embodiments of the present invention, all equivalent changes done according to scope of the present invention patent with
Modification should all belong to the covering scope of the present invention.
Claims (2)
1. a kind of detection method of device for azo colouring agent on-line checking, which is characterized in that
Device for azo colouring agent on-line checking includes sequentially connected constant flow pump transport system, reduction reaction system, again
Nitridation reaction system, chromogenic reaction system and colorimetric assay system；The constant flow pump transport system includes one equipped with distilled water
Reagent bottle, one reagent bottle, a reagent bottle and a reagent bottle equipped with sample to be tested equipped with go back original reagent equipped with buffer reagent；
The reagent bottle equipped with distilled water, the reagent bottle equipped with buffer reagent, the reagent bottle equipped with go back original reagent and equipped with waiting for test sample
The reagent bottle of product is connect through a pump housing with a four-way valve respectively；
The reduction reaction system includes an electronic temperature control device and one is set to reduction reactor in the electronic temperature control device, institute
The input terminal for stating reduction reactor is connected with that four-way valve；
The diazo-reaction system include a cooler, the cooler respectively with the output end of the reduction reactor and one
Diazo-reaction device connects, and the diazo-reaction device is also respectively through the reagent bottle of a pump housing and one equipped with acid reagent and a dress
There is the reagent bottle of diazo reagent to connect；
The chromogenic reaction system includes a chromogenic reaction device, and the chromogenic reaction device is connect with the diazo-reaction device, institute
Chromogenic reaction device is stated also respectively to connect through the reagent bottle of a pump housing and one equipped with masking reagent and a reagent bottle equipped with colour reagent
It connects；
The colorimetric assay system includes a detection cell, and a colorimetric detector, the colorimetric detection are provided in the detection cell
Device is connect with a signal acquisition process terminal；
Detection method includes the following steps：
Step S1：Configure buffer reagent, go back original reagent, acid reagent, diazo reagent, masking reagent and colour reagent；
Step S2：Each reagent of distilled water, sample to be tested, step S1 configurations is injected into corresponding reagent bottle；
Step S3：It is with the flow velocity of 1.0mL/min that the buffer reagent, go back original reagent and sample to be tested is defeated to start the corresponding pump housing
Enter four-way valve to be mixed, stops the pump housing after 10 seconds；
Step S4：The electronic temperature control device heating temperature is controlled to 70 degrees Celsius, while the mixed liquor in four-way valve is sent into institute
It states and reacts 10min in reduction reactor；
Step S5：Start the pump housing being connect with the reagent bottle equipped with distilled water, pushes described in the mixed liquor warp in reduction reactor
Cooler stops the pump housing after rapidly entering the diazo-reaction device；Then be respectively started with equipped with acid reagent reagent bottle and
The pump housing of reagent bottle connection equipped with diazo reagent, injects sulphur with the flow velocity of 1.0mL/min into the diazo-reaction device
Acid reagent and diazo reagent stop the pump housing and react 3min after 10 seconds；
Step S6：Start the pump housing being connect with the reagent bottle equipped with distilled water, pushes the mixed liquor in diazo-reaction device quick
Stop the pump housing after into the chromogenic reaction device；Then start the pump housing being connect with the reagent bottle equipped with masking reagent, with
The flow velocity of 1.0mL/min injects masking reagent into the chromogenic reaction device, stops the pump housing after 10 seconds and reacts 3min；Then it opens
The dynamic pump housing being connect with the reagent bottle equipped with colour reagent is injected into the chromogenic reaction device with the flow velocity of 1.0mL/min and is shown
Color reagent stops the pump housing and reacts 15min after 10 seconds；
Step S7：Start the pump housing being connect with the reagent bottle equipped with distilled water, the mixed liquor in chromogenic reaction device is delivered into
Detection cell carries out online colorimetric analysis by colorimetric detector and signal acquisition process terminal-pair mixed liquor and obtains in sample to be tested occasionally
The content of nitrogen colorant.
2. the detection method of the device according to claim 1 for azo colouring agent on-line checking, it is characterised in that：Institute
The citrate solution that buffer reagent is pH=6.0 is stated, the go back original reagent is the hydrogensulfite solution of 0.20mol/L, institute
The sulfuric acid solution that acid reagent is 0.10mol/L is stated, the diazo reagent is the nitrite natrium solution that mass content is 5%, institute
It is the sulfamic acid amine aqueous solution that mass content is 2.5% to state masking reagent, and the colour reagent is the N- that mass content is 2%（1-
Naphthalene）Ethylenediamine-hydrochloride solution.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510792863.1A CN105277552B (en) | 2015-11-18 | 2015-11-18 | A kind of device and its application method for azo colouring agent on-line checking |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510792863.1A CN105277552B (en) | 2015-11-18 | 2015-11-18 | A kind of device and its application method for azo colouring agent on-line checking |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN105277552A CN105277552A (en) | 2016-01-27 |
| CN105277552B true CN105277552B (en) | 2018-10-30 |
Family
ID=55146936
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201510792863.1A Active CN105277552B (en) | 2015-11-18 | 2015-11-18 | A kind of device and its application method for azo colouring agent on-line checking |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105277552B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918741B (en) * | 2018-10-11 | 2021-07-09 | 重庆市计量质量检测研究院 | Automatic pretreatment method for forbidden detection of harmful aromatic amine dye |
| CN108918740B (en) * | 2018-10-11 | 2021-06-18 | 重庆市计量质量检测研究院 | Automatic pretreatment system for forbidden detection of harmful aromatic amine dye |
| CN113281332B (en) * | 2021-05-21 | 2022-10-18 | 湘南学院 | Chinese-medicinal material sulfur dioxide short-term test appearance |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507561A (en) * | 2011-11-08 | 2012-06-20 | 山东出入境检验检疫局检验检疫技术中心 | Rapid detection kit and detection method of forbidden azo dyes in dyed textiles |
| CN103033579A (en) * | 2012-12-27 | 2013-04-10 | 通标标准技术服务(上海)有限公司 | Rapid determination method for content of banned azo dye |
| CN103091314A (en) * | 2013-01-16 | 2013-05-08 | 深圳市计量质量检测研究院 | Rapid detection method for water-soluble azo dyes in foods |
| CN103175931A (en) * | 2012-11-29 | 2013-06-26 | 泰州市产品质量监督检验所 | Method for determining harmful aromatic amine by liquid chromatogram-tandem mass spectrometry |
| CN103760288A (en) * | 2014-01-28 | 2014-04-30 | 国家烟草质量监督检验中心 | Test method of banned azo-dye in cigarette paper |
| CN104330395A (en) * | 2014-11-25 | 2015-02-04 | 福州大学 | Device for online fluorescence detection of bromates and application method of device |
| CN205120599U (en) * | 2015-11-18 | 2016-03-30 | 福州大学 | A device for azo colorant on -line measuring |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6627738B2 (en) * | 1995-09-15 | 2003-09-30 | Duke University | No-modified hemoglobins and uses therefor |
| AU2001261224B2 (en) * | 2000-05-08 | 2004-01-29 | Jp Laboratories, Inc. | Color changing steam sterilization indicator |
-
2015
- 2015-11-18 CN CN201510792863.1A patent/CN105277552B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102507561A (en) * | 2011-11-08 | 2012-06-20 | 山东出入境检验检疫局检验检疫技术中心 | Rapid detection kit and detection method of forbidden azo dyes in dyed textiles |
| CN103175931A (en) * | 2012-11-29 | 2013-06-26 | 泰州市产品质量监督检验所 | Method for determining harmful aromatic amine by liquid chromatogram-tandem mass spectrometry |
| CN103033579A (en) * | 2012-12-27 | 2013-04-10 | 通标标准技术服务(上海)有限公司 | Rapid determination method for content of banned azo dye |
| CN103091314A (en) * | 2013-01-16 | 2013-05-08 | 深圳市计量质量检测研究院 | Rapid detection method for water-soluble azo dyes in foods |
| CN103760288A (en) * | 2014-01-28 | 2014-04-30 | 国家烟草质量监督检验中心 | Test method of banned azo-dye in cigarette paper |
| CN104330395A (en) * | 2014-11-25 | 2015-02-04 | 福州大学 | Device for online fluorescence detection of bromates and application method of device |
| CN205120599U (en) * | 2015-11-18 | 2016-03-30 | 福州大学 | A device for azo colorant on -line measuring |
Non-Patent Citations (2)
| Title |
|---|
| 一步萃取法检测纺织品中禁用偶氮染料;方荣谦等;《厦门大学学报（自然科学版）》;20110930;第50卷;第53-56页 * |
| 纺织品禁用偶氮染料的检测;阿阳;《纺织科技进展》;20071225(第6期);第7-10页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN105277552A (en) | 2016-01-27 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN105277552B (en) | A kind of device and its application method for azo colouring agent on-line checking | |
| CN103439258B (en) | A kind of water nutrition in situ detection instrument based on integrated valve terminal device and detection method | |
| CN102998298A (en) | Method for rapidly detecting nitrite by using surface enhanced Raman spectrum and application thereof | |
| CN102243244A (en) | Automatic analyzer for total nitrogen in solution and analysis method thereof | |
| CN102495008A (en) | Method for detecting silicon content in vanadium-aluminum alloy | |
| CN103207154B (en) | Method for quantitatively analyzing proteins | |
| CN104330395B (en) | A kind of device for the online fluoroscopic examination of bromate and using method thereof | |
| CN105445218A (en) | Establishing method of self-adaptive model for detection of content of protein of rapeseeds on basis of mid-infrared spectrum | |
| CN106290744A (en) | Exhaust analyzer calibrating installation | |
| CN205484299U (en) | Quality of water on -line measuring device | |
| CN106596490A (en) | Supermolecular sensor array and method for synchronously detecting paraquat and diquat | |
| Khamkhajorn et al. | Smartphone-based colorimetric method for determining sulfites in wine using a universal clamp sample holder and microfluidic cotton swab-based analytical device | |
| CN106841182A (en) | Simultaneously and rapidly monitor the on-line computing model and method of silicate and phosphate radical in water | |
| CN102353668A (en) | Method for determining anionic surfactant in surface water | |
| CN205120599U (en) | A device for azo colorant on -line measuring | |
| de Morais et al. | Determination and analytical validation of creatinine content in serum using image analysis by multivariate transfer calibration procedures | |
| CN102253232A (en) | Automatic analyzer and analysis method for water soluble total phosphorus | |
| CN101413897A (en) | Method and reagent kit for detecting nitrite shield reagent in milk | |
| CN205229121U (en) | Aquaculture pond oxygen deficiency early warning device | |
| Magnaghi et al. | A green-PAD array combined with chemometrics for pH measurements | |
| Jakmunee et al. | Novel approach for mono-segmented flow micro-titration with sequential injection using a lab-on-valve system: a model study for the assay of acidity in fruit juices | |
| Maskula et al. | Titration of strong and weak acids by sequential injection analysis technique | |
| CN104360090A (en) | Automatic soil analyzer and method for measuring trace elements in soil by using automatic soil analyzer | |
| CN101178366A (en) | Method for detecting flash milk doped with carbonyl amines substance | |
| CN101368971A (en) | Detection method for on-site fast detection protein nitrogen |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |