Robot-based permanganate index analyzer

Abstract

The invention provides a robot-based permanganate index analyzer. The robot-based permanganate index analyzer is characterized by comprising a work platform, a sample moving mechanism and a reagent adding mechanism, wherein the work platform comprises a sample area, a heating reaction area and a titration area; the sample moving mechanism performs three-dimensional motion in the work platform andpicks and places samples in the work platform to specific work positions according to specific workflow; the reagent adding mechanism moves in the heating reaction area and the titration area and addsspecific reagents to the samples placed in the work range of the reagent adding mechanism according to specific workflow; the samples and the reagents are mixed and react in the heating reaction area; a detection mechanism in the titration area judges color change of the samples, so that the end point of the reaction is judged. The robot-based permanganate index analyzer is high in precision, andthe problems of errors caused by manual detection and the like can be solved.

Description

technical field [0001] The invention relates to the field of analytical instruments, in particular to a robot permanganate index analyzer. Background technique [0002] The permanganate index refers to the amount consumed when treating water samples with potassium permanganate as the oxidant in acidic or alkaline medium, expressed in mg / L of oxygen. Nitrite, ferrous salt, sulfide and other reducing inorganic substances in water and organic substances that can be oxidized under these conditions can consume potassium permanganate. Therefore, the permanganate index is often used as a comprehensive indicator of the degree of surface water pollution by organic pollutants and reducing inorganic substances. [0003] Our country stipulates the standard of permanganate index of environmental water quality: "Determination of water quality permanganate index GB11892-89". The principle of the permanganate index method is: add sulfuric acid to the water sample to make it acidic, then a...

AI Technical Summary

Problems solved by technology

[0007] The main disadvantages of the method are: 1. Poor comparability, large errors, and high requirements for personnel operations

[0008] 2. Low efficiency, manual operation, it is difficult to meet the batch sample test and emergency test

[0009] 3. High labor intensity;

[0010] 4. The human body is easily exposed to strong acids and strong oxidants

Does not meet the standards and is difficult to promote and use

At present, laboratories basically do not use

[0013] 2. The electrode is easy to corrode or the sensitivity of adsorbing impurities in water decreases

[0014] 3. Use a pump to transfer samples and liquids, the consistency will change over time

Therefore, if manual operation requires high personnel skills, small differences may lead to incomparable results

[0017] 2. At present, the laboratory determination of permanganate index is basically manual testing, the workload is very heavy, and there is a strong contradiction between the time efficiency requirements of the test results and the inefficiency of the test process

It is inconsistent with the colorimetric titration method of the national standard. Due to the standard requirements, it is difficult to widely promote the use

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