Continuous-sampling CODMn determination method and analyzing instrument
A technique for measuring methods and analyzers, applied in the field of measuring methods and analyzers for CODMn, capable of solving problems such as interference
Pending Publication Date: 2018-04-24
上海北裕分析仪器股份有限公司
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Problems solved by technology
The introduction of this method and instrument will solve the problem of sample turbidity and chromaticity interference in the permanganate index test, improve the efficiency and quality of the test, and at the same time promote the widespread use of gas phase molecular spectroscopic analysis methods in the permanganate index test
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[0142] Such as Figure 4 As shown, the digestion queue module also includes a waste liquid pool and a sample pump P5;
[0143] One end of the sample pump P5 is connected with the sampler, and the other end is connected with the waste liquid pool. The sampler is controlled by the system to perform the waste liquid output function of the digestion tube to be cleaned / cleaned, and the liquid is discharged through the sample pump P5 Transport to the waste liquid pool.
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The invention provides a continuous-sampling CODMn determination method. The method is characterized by including a sample procedure, a chemical reaction procedure and an analytical detection procedure in sequential execution. The sample procedure includes continuous uninterrupted sampling or continuous sampling at appointed time intervals to form a sample array; the chemical reaction procedure includes that various agents for digestion reaction are automatically added one by one for each sample in the sample array by a production line operating mode according to appointed takt time to realizedigestion reaction; the analytical detection procedure includes that permanganate index determination is performed aiming at samples subjected to digestion reaction. A brand-new permanganate index analyzing instrument is designed and developed on the basis of the method. By the method and the instrument, problems of sample turbidity and colority interference in permanganate index determination can be solved, and testing efficiency and quality are improved. In addition, extensive application of a gas-phase molecular spectrometry method in permanganate index testing is promoted.
Description
Technical field [0001] The present invention provides a chemical analysis method and instrument, and specifically relates to a continuous sample CODMn determination method and analyzer. Background technique [0002] Permanganate index is a comprehensive indicator of the degree of pollution of surface water bodies by organic pollutants and reductive inorganic pollutants. It refers to the oxygen consumed when permanganate is used as an oxidant to treat water samples in an acidic or alkaline medium. Expressed in mg / L of oxygen. Permanganate index is often used as a comprehensive indicator of the degree of pollution of surface water bodies by organic pollutants and reducing inorganic substances. [0003] The existing national standard methods mainly use sodium oxalate to reduce the remaining potassium permanganate and add excess, and then use potassium permanganate to drip the excess sodium oxalate, and manually observe the color change of the solution to determine the end of the reac...
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IPC IPC(8): G01N21/31G01N21/01
CPCG01N21/01G01N21/31G01N2021/3125
Inventor 赵勇卢文武陈凡田英丁井井阳纯泉张琤王文雷李明李保陆九如蔡杰
Owner 上海北裕分析仪器股份有限公司
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