Flowing injection colorimetric measurement method and device for anion synthetic detergent content of water

A technology of synthetic detergent and flow injection, applied in the direction of color/spectral characteristic measurement, etc., can solve the problems of unused color development and detection principle, not yet widely promoted, low sensitivity, etc., achieve high degree of automation, save chemical reagents, flow road simple effect
CN101776582BInactive Publication Date: 2012-10-10BEIJING JITIAN INSTR CO LTD
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Patents(China)
Current Assignee / Owner
BEIJING JITIAN INSTR CO LTD
Publication Date
2012-10-10
Estimated Expiration
Not applicable · inactive patent

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Abstract

The invention provides a flowing injection colorimetric measurement method for an anion synthetic detergent content of water. The method comprises the following steps of: (1) mixing acid aqueous solution of naphthisodiazine and buffer solution in a first knotted reactor of which the length of capillaries is 0.5 to 10 meters; (2) mixing the obtained mixed solution and aqueous solution of ammonium ferrous sulfate in a second knotted reactor of which the length of capillaries is 0.5 to 10 meters; (3) mixing the mixed solution obtained by the step (2) and solution to be detected in a fourth knotted reactor of which the length of capillaries is 0.9 to 9 meters; (4) mixing the mixed solution obtained by the step (3) and extraction solution of chloroform in a third knotted reactor of which the length of capillaries is 0.5 to 9 meters; (5) separating the obtained mixed solution by an on-line extraction module, making the extraction solution enter a flow through cell and mapping the generated spectrogram; and (6) comparing the drawn sample spectrogram with the standard sample spectrogram, and calculating the anion synthetic detergent content of the sample.
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Description

technical field

[0001] The invention relates to a detection technology of anion synthetic detergent in water, in particular to a flow injection colorimetric measurement method and instrument for the content of anion synthetic detergent in water. Background technique

[0002] Anionic synthetic detergents are widely present in various water bodies such as wastewater, rivers and drinking water. High concentration of anionic synthetic detergent will pollute the water quality, so its concentration is usually used as one of the necessary indicators for water pollution. Currently, the national standard (GB / T 5750.4-2006) provides detection methods for anionic synthetic detergents in water, including methylene blue spectrophotometry and phenanthrene extraction spectrophotometry. Among them, methylene blue spectrophotometry: react a sample containing an anionic surfactant with methylene blue to generate a blue compound, extract it with chloroform, and measure its absorbance value at...

Claims

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