CN101782523B - Method for online detecting arsenic content in water by using dithioantipyrine methane as color developing agent - Google Patents
Method for online detecting arsenic content in water by using dithioantipyrine methane as color developing agent Download PDFInfo
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- CN101782523B CN101782523B CN2010101187746A CN201010118774A CN101782523B CN 101782523 B CN101782523 B CN 101782523B CN 2010101187746 A CN2010101187746 A CN 2010101187746A CN 201010118774 A CN201010118774 A CN 201010118774A CN 101782523 B CN101782523 B CN 101782523B
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Abstract
The invention discloses a color developing agent for detecting arsenic in a water quality online analyzer, which is characterized by comprising the following components in parts by weight: the color developing agent is dithio-antipyrine methane, and the molecular structural formula is as follows:
the reaction acidity range of the color developing agent and sample water is 4-48 mol/L, and the reaction temperature is 10-35 ℃. The invention uses dithioantipyrine methane for detecting arsenic content in a water quality on-line analyzer, can generate stable complex with arsenic in water quality, and has good anti-interference performanceExcellent selectivity, low cost of the required detection instrument and convenient operation and maintenance of the required detection instrument.
Description
Technical field
The present invention relates to detect the method for arsenic content in the water quality, especially relate to the method for arsenic content in the online detection water quality that a kind of two sulfo-antipyrylmethanes are developer.
Background technology
The on-line determination method of arsenic mainly is to adopt colourimetry and electrochemical method (anodic stripping voltammetry) etc. at present in the water.And colourimetry wherein has that good stability, instrument development cost are low, operation and advantage easy to maintenance.By the numerous domestic water quality online analyzer is adopted; But both at home and abroad at present all adopt water quality on-line monitoring instrument device that colourimetrys survey arsenic still not ideal enough at aspects such as monitoring sensitivity, environmental friendliness, realization are easy; And being chosen in the colourimetry instrument development of developer is most important, selects appropriate developer can alleviate the Control System Design complexity, improves accuracy of measurement or the like.When online arsenic analyser is selected ammonium molybdate as developer for use; This developer receives the interference of phosphorus in the water body very big; Because phosphorus and arsenic are positioned at same family in the periodic table of elements, chemical property has a lot of similar places, such as ammonium molybdate also can with phosphorus generation complex reaction; And the single screener of eliminating the phosphorus interference does not temporarily appear in the newspapers; The interference that at present this online survey arsenic analyser is got rid of phosphorus is to disturb through adopting double light path measurement phosphorus and these two kinds of units of arsenic usually to deduct phosphorus, but has so both increased hardware cost, and it is very complicated that control also becomes.When online arsenic analyser selects for use the conduct of lignocaine two bamic acids silver to survey the developer of total arsenic; The gas arsenic hydride that in the apparatus measures process, generates be gaseous state and severe toxicity arranged; Cause easily to the pollution of surrounding environment and the field maintemance personnel component is poisoned dangerous, and also more complicated of the control stream of arsenic hydride.
Summary of the invention
To above problem, the object of the invention is to provide a kind of can generate detection method stable comple, low, the required detecting instrument operation of excellent, the required detecting instrument cost of the good reaction selectivity of anti-interference and developer easy to maintenance with arsenic in the water quality.
The present invention realizes through following technical measures, a kind of developer that is used for water quality online analyzer detection arsenic, and two sulfo-antipyrylmethanes are called for short DPTM, and its molecular structural formula is following:
According to langbobier law A=1g (I
0/ I
t)=kbc, if the length b of cuvette is certain, the size of concentration c is by the photovoltage value I that is gathered
tDecision, and photovoltage value I
tBe that concentration with obvious look complex compound decides, also promptly under the condition that developer fully reacts, concentration of element to be measured is into certain linear with the logarithm of photovoltage value; And in fact; Determinand is not and all developers can both well fully react, and the chromogenic reaction that has needs harsh acidity condition, and the chromogenic reaction that has needs high temperature; The chromogenic reaction that has do not occur over just element to be measured also with other non-determinand generation chromogenic reaction, seriously disturbed measurement to element to be measured.The of paramount importance work that is selected to the online appearance design of colourimetry to developer.And to surveying arsenic in the water quality, our experiment contrast through repeatedly and do the consideration of online application thinks that two sulfo-antipyrylmethanes are preferable developers of the online survey arsenic of a kind of water quality.The colour developing complex compound color stability time that arsenic and two sulfo-antipyrylmethanes form can stablize 2 hours at least, and the arsenic complex maximum absorption band of formation is at the 327nm place, and its optimum response acidity scope is 4mol/L--48mol/L.
Use the method for arsenic content in the online detection water quality of two sulfo-antipyrylmethanes; Testing process is: from environment, extract water sample by processor control water pump, and clean whole pipeline through water sample, in the colorimetric chamber, pump into quantitative sulfuric acid, two sulfo-antipyrylmethanes then successively; Pump into quantitative water sample to the colorimetric chamber at last; Fully after the reaction, processor control deuterium lamp and corresponding monochromatic module are sent the UV-irradiation of 327nm to the colorimetric chamber, and a plurality of photovoltage values are write down in gradation; And send into processor and average; Be stored in the linear relation that the timing signal in the processor obtains to the mean value substitution then, calculate the concentration of sample in the water sample, and gained concentration and relevant water sample information sent central computer is stored, inquiry by processor.Temperature in the testing process wherein is a normal temperature.
Therefore the present invention uses two sulfo-antipyrylmethanes to be used for water quality online analyzer to detect arsenic content and have and can generate stable comple, low, the required detecting instrument operation of excellent, the required detecting instrument cost of the good reaction selectivity of anti-interference and advantage easy to maintenance with arsenic in the water quality.
Description of drawings
Fig. 1 is a kind of structural representation that uses arsenic on-line analyzer of the present invention.
Embodiment
Below in conjunction with embodiment and contrast accompanying drawing the present invention is done further explain.
A kind of use two sulfo-antipyrylmethanes detect the method for the content of arsenic in the water quality as developer:
(1), at normal temperatures, go into water sample detergent line from sample bottle 5 to each in-line pump through multiport valve 7 by PLC module 16 control peristaltic pumps 15, the water sample after will being cleaned through the respective channel of multiport valve 7 by peristaltic pump 13 again pumps into waste liquid barrel 14;
(2), pump into sulfuric acid solution, two sulfo-antipyrylmethane reagent, screener from sulphate reagent bottle 1, developer bottle 4, screener reagent bottle 8 to colorimetric chamber 11 by PLC module 16 control peristaltic pumps 15 and multiport valve 7; Pump into the water sample to be measured of 50ml again to quantity tube 13 from sample bottle 5 by PLC module 16 control peristaltic pumps 15; By the respective channel of peristaltic pump 13 through multiport valve 7 water samples in the quantity tube 13 are pumped into colorimetric chamber 11; Then constantly pump into air with multiport valve 7 to colorimetric chamber 11, make between each reagent, fully mix between sample and reagent by PLC module 16 control peristaltic pumps 15;
(3), use the ultraviolet light of 327nm to carry out photoelectric measurement by the solution in PLC module 16 control survey light sources 9 and the photoelectric conversion module contrast colors chambers 11 12 then; And the photovoltage value under a plurality of these states of gradation record; To collect the photoelectric measurement data computation by PLC module 16 and go out mean value; Be stored in the linear relation that the timing signal in the PLC module 16 obtains to the mean value substitution then; Calculate the concentration of sample in the water sample by PLC module 16, and the gained concentration data is stored in the reservoir in the PLC module 16, then the liquid in the colorimetric chamber 11 are pumped into waste liquid barrel 14 or directly discharge system;
(4), PLC module 16 sends to central computer 17 with the concentration data of the appearance water arsenic content in the reservoir and the coded data of this detecting device and sampling spot, the data-signal of 17 pairs of receptions of central computer is stored for inquiry.
Below be to use two sulfo-antipyrylmethanes to survey arsenic and be used on the corresponding water quality online analyzer, setting measurement is spaced apart 6 minutes, and the gained tables of data is following when surveying same actual concentrations and be the arsenic solution of 1.40mg/L:
This shows, compare other developer, two sulfo-antipyrylmethanes have pair arsenic to have more selectivity, highly sensitive, reaction conditions is less demanding distinguishing features such as (normal temperature get final product).
More than be to use two sulfo-antipyrylmethanes to be used for water quality on-line analysis detection to the present invention to set forth; Be used for helping to understand the present invention; But embodiment of the present invention is not restricted to the described embodiments; Any change that does not deviate under the principle of the invention to be done, modification, substitute, combination, simplify, all should be the substitute mode of equivalence, be included within protection scope of the present invention.
Claims (3)
1. two sulfo-antipyrylmethanes are the method for arsenic content in the online detection water quality of developer; This developer is 4mol/L--48mol/L with the reaction acidity scope of appearance water, and range of reaction temperature is 10 ℃-35 ℃, it is characterized in that testing process is: from environment, extract water sample by processor control water pump; And clean whole pipeline through water sample; In the colorimetric chamber, pump into quantitative sulfuric acid, two sulfo-antipyrylmethanes then successively, pump into quantitative water sample to the colorimetric chamber at last, fully after the reaction; Processor control deuterium lamp and corresponding monochromatic module are sent the UV-irradiation of 327nm to the colorimetric chamber; A plurality of photovoltage values are write down in gradation, and send into processor and average, and are stored in the linear relation that the timing signal in the processor obtains to the mean value substitution then; Calculate the concentration of sample in the water sample by processor, and gained concentration and relevant water sample information sent central computer is stored, inquiry.
2. the method for arsenic content in the online detection water quality according to claim 1 is characterized in that: the temperature in the testing process is 10 ℃-35 ℃.
3. the method for arsenic content in the online detection water quality according to claim 1 is characterized in that: the wavelength of deuterium lamp emission is 327nm in the testing process, and the indoor acidity scope of colorimetric is 4mol/L--48mol/L.
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| Application Number | Priority Date | Filing Date | Title |
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| CN2010101187746A CN101782523B (en) | 2010-03-03 | 2010-03-03 | Method for online detecting arsenic content in water by using dithioantipyrine methane as color developing agent |
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| CN2010101187746A CN101782523B (en) | 2010-03-03 | 2010-03-03 | Method for online detecting arsenic content in water by using dithioantipyrine methane as color developing agent |
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| CN101782523B true CN101782523B (en) | 2012-06-27 |
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| CN103033499B (en) * | 2011-10-08 | 2016-08-31 | 桂林欧博仪器技术有限公司 | A kind of water quality analytical system |
| CN104155422B (en) * | 2014-07-18 | 2017-01-11 | 苏州卫水环保科技有限公司 | Water quality detection pipeline system and method |
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| CN1675525A (en) * | 2002-08-21 | 2005-09-28 | 纽约市哥伦比亚大学托管会 | An arsenic meter |
| CN101266214A (en) * | 2007-03-16 | 2008-09-17 | 长春吉大·小天鹅仪器有限公司 | Device for rapid detection for arsenic of sample |
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| US5824270A (en) * | 1995-08-15 | 1998-10-20 | Rao; Tenneti V. | On-line water monitor |
| US7770534B2 (en) * | 2001-08-10 | 2010-08-10 | Isadore Cooperman | Changed condition indicator |
| CN100504359C (en) * | 2005-09-23 | 2009-06-24 | 中国科学院生态环境研究中心 | On-line monitoring chemical light-illuminating detector for contaminant in aquatic sample |
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| SU819097A1 (en) * | 1979-06-05 | 1981-04-07 | Предприятие П/Я Р-6767 | Method of preparing dithiopyrylmethanes |
| CN1675525A (en) * | 2002-08-21 | 2005-09-28 | 纽约市哥伦比亚大学托管会 | An arsenic meter |
| CN101266214A (en) * | 2007-03-16 | 2008-09-17 | 长春吉大·小天鹅仪器有限公司 | Device for rapid detection for arsenic of sample |
| JP2009210333A (en) * | 2008-03-03 | 2009-09-17 | Nippon Mining & Metals Co Ltd | Pretreatment apparatus for analyzing concentration of metal in wastewater and analyzing system equipped with it |
| CN201233392Y (en) * | 2008-07-31 | 2009-05-06 | 中南民族大学 | Real time on-line detection device for multi metallic elements in waste water |
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