Determination of reduced potassium permanganate substances (1)

1 Scope

This section specifies the visual colorimetric method and titration method for the determination of reduced potassium permanganate substances in organic chemical products

This part of the visual colorimetric method is suitable for the determination of reducing potassium permanganate substances in alcohols, ketones and other neutral, weakly acidic and weakly alkaline organic chemical products; the titration method is suitable for potassium permanganate index and other butyl or butyl 10mg /100mL Organic chemical products that do not react with potassium permanganate under acidic conditions

2 Normative references

The following documents are indispensable for the application of this document

Preparation of GB/T601 Chemical Reagent Standard Titration Solution

Preparation of preparations and products used in GB/T603 chemical reagent test method towel (GB/T603-2002, ISO6353-1: 1982, NEQ)

GB/T3143 Liquid chemical product color determination method (Hazen unit-platinum diamond color number)

GB/T6682 Analytical laboratory water specifications and test methods (GB/TS682-2008, ISO3696:1987, MOD)

3 Test method

3.

Some test procedures specified in the test method may lead to dangerous situations, and the operator should take appropriate safety and protective measures

3.

Unless otherwise specified, only reagents confirmed to be analytically pure and secondary water specified in GB/T6682 are used in the analysis

The standard titration solutions, preparations and products used in the analysis are prepared in accordance with the provisions of GB/T601 and GB/T603 when other requirements are not specified.

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3.

Under specified conditions, add potassium permanganate solution to the sample.

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The ratio of cobalt chloride solution to platinum-cobalt standard solution No.