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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

Inactive Publication Date: 2012-10-10
BEIJING JITIAN INSTR CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the sensitivity of this method is slightly low, and it is not suitable for use in drinking water, tap water and other water environments with less anionic synthetic detergent content, and the color development and detection principles in this method have not adopted national standard methods, and have not been widely promoted.

Method used

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

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Embodiment 1

[0026] Below in conjunction with accompanying drawing and embodiment the present invention is further described:

[0027] The flow injection colorimetric measuring method of anionic synthetic detergent content in water comprises the steps in turn:

[0028] (1) be that the acidic phenanthrene diazepam aqueous solution of 1.0g / L and pH are the potassium hydrogen phthalate-hydrochloric acid buffer solution of 4.8 and mix in the first weaving reactor 17, the first weaving reactor 17 capillary The length is 0.5m;

[0029] (2) mixed solution and concentration of step (1) gained are that 3.0g / L ferrous ammonium sulfate aqueous solution is mixed in the second weaving reactor 19, and the length of the second weaving reactor 19 capillaries is 0.5m;

[0030](3) Mix the mixed solution of step (2) step gained and the liquid to be detected in the reagent bottle 8 in the fourth weaving reactor 23, and the length of the fourth weaving reactor 23 capillaries is 0.9m;

[0031] (4) the mixed s...

Embodiment 2

[0072] The flow injection colorimetric measuring method of anionic synthetic detergent content in water comprises the steps in turn:

[0073] (1) the acidic phenanthroline aqueous solution of 2.0g / L and the ammonium acetate buffer solution with pH of 3.0 are mixed in the first weaving reactor 17, and the length of the first weaving reactor 17 capillaries is 5.0m;

[0074] (2) mixed solution and concentration of step (1) gained are that 1.7g / L ferrous ammonium sulfate aqueous solution is mixed in the second weaving reactor 19, and the length of the second weaving reactor 19 capillaries is 5.0m;

[0075] (3) Mix the mixed solution obtained in step (2) and the liquid to be detected in the reagent bottle 8 in the fourth weaving reactor 23, and the length of the capillary of the fourth weaving reactor 23 is 5.0m;

[0076] (4) Mixed solution and extractant chloroform of step (3) step gained are mixed in the third weaving reactor 21, and the length of the capillary of the third weavi...

Embodiment 3

[0090] The flow injection colorimetric measuring method of anionic synthetic detergent content in water comprises the steps in turn:

[0091] (1) the acidic phenanthroline aqueous solution of 5.0g / L and the pH are mixed in the disodium hydrogen phosphate-citric acid buffer solution of 6.0 in the first weaving reactor 17, the length of the first weaving reactor 17 capillaries 10cm;

[0092] (2) mixed solution and concentration of step (1) gained are that 4.0g / L ferrous ammonium sulfate aqueous solution is mixed in the second weaving reactor 19, and the length of the second weaving reactor 19 capillaries is 10cm;

[0093] (3) Mix the mixed solution obtained in step (2) and the liquid to be detected in the reagent bottle 8 in the fourth weaving reactor 23, and the length of the capillary of the fourth weaving reactor 23 is 9.0m;

[0094] (4) The mixed solution obtained in step (3) step and the extractant chloroform are mixed in the third weaving reactor 21, and the length of the...

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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.

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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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N21/31
Inventor 张卫宏赵萍魏月仙顾爱平
Owner BEIJING JITIAN INSTR CO LTD
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