Automatic analyzer for anionic surfactant in water and automatic analysis method

A surfactant, automatic analyzer technology, applied in the direction of material analysis by observing the influence of chemical indicators, analyzing materials, and analyzing materials by chemical reaction, which can solve the problem that the sensitivity of the method cannot meet the actual measurement needs, The extraction phase separator has problems such as poor reproducibility and poor long-term stability, and achieves the effects of fast test speed, good accuracy and strong anti-interference ability.

Active Publication Date: 2010-04-07
BEIJING JITIAN INSTR CO LTD
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  • Abstract
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  • Application Information

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Problems solved by technology

However, most of the methods are not based on national standards, and the sensitivity of the methods cannot meet the actual measurement

Method used

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  • Automatic analyzer for anionic surfactant in water and automatic analysis method
  • Automatic analyzer for anionic surfactant in water and automatic analysis method
  • Automatic analyzer for anionic surfactant in water and automatic analysis method

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Embodiment Construction

[0023] like figure 1The automatic analyzer of anionic surfactant in water shown includes an automatic sampling device 1, a peristaltic pump 27, a detector 26, a computer processing system 17, and a sample processing component. The automatic sampling device 1 includes a sampling needle 2 and a peristaltic pump 27 is a peristaltic pump with double pump heads and ten channels. The detector 26 is provided with a flow cell 25. The detector 26 is connected to the computer recorder 17 through the signal line 10. The sample processing assembly includes a sample injection valve 21, two knitting reactors 15, 23. Three three-way valves 16, 18, 22, four-way valve 9, two microporous chemically inert hydrophobic membrane online extraction modules 14, 24, several capillary connecting pipes, several peristaltic pump pump pipes (33), several container bottles , as shown in Fig. 3a, each microporous chemically inert hydrophobic membrane online extraction module 14 comprises a ]-shaped fixed blo...

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Abstract

The invention discloses an automatic analyzer for an anionic surfactant in water, which comprises an automatic sampling device, a peristaltic pump, a detector and a sample processing assembly, wherein the sample processing assembly comprises a sample filling valve, knotted reactors, a three-way valve, a four-way valve, chemically inert microporous hydrophobic film on-line extraction modules, and a capillary connecting pipe; and one port of the sample filling valve is connected with a flask for carrying current, and the other port is orderly connected with a first knotted reactor, a first chemically inert microporous hydrophobic film on-line extraction module, a second knotted reactor, a second chemically inert microporous hydrophobic film on-line extraction module, the four-way valve, a flow cell, the detector and a computer processing system. The automatic analyzer can continuously and automatically test samples, has high test speed, the frequency of detecting samples of 18 samples/hour, high test sensitivity and good test accuracy, and uses the on-line double extraction modes to have strong interference resistance; and most inorganic ions such as SCN-, CN-, NO3-, Cl-, F-, Br- and the like are not interfered when the concentration is 1,000mg/L.

Description

technical field [0001] The invention relates to an analysis of anionic surfactants in water, in particular to an automatic analyzer for measuring anionic surfactants in water by flow injection colorimetry and an automatic analysis method for anionic surfactants in water. Background technique [0002] Anionic surfactants in water will cause foams that are not easy to disappear on the water surface and consume dissolved oxygen in the water, thus affecting water quality. Therefore, anionic surfactants have become a must-check item in drinking water and environmental testing. At present, the detection method of anionic surfactants is the methylene blue spectrophotometric method adopted in accordance with the national standard (GB / T5750.4-2006): the sample containing anionic surfactants is reacted with methylene blue to generate a blue compound, which is extracted with chloroform Finally, the absorbance value is measured at 650nm, which is correlated with the concentration of the...

Claims

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Application Information

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IPC IPC(8): G01N35/10G01N21/78
Inventor 赵萍肖靖泽顾爱平魏月仙
Owner BEIJING JITIAN INSTR CO LTD
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