Determination of acrylonitrile peroxide content for industrial use. Spectrophotometric method (1)

1 Scope

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This section applies to industrial acrylonitrile samples with a peroxide ( calculated as hydrogen peroxide ) content of 0.

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2 Normative references

The clauses in the following documents become clauses of this part after being quoted in this part of GB/T7717

Preparation of GB/T601 Chemical Reagent Standard Titration Solution

Preparation of preparations and products used in GB/T603 chemical reagent test method

GB/T3723 General Rules for Sampling Safety of Industrial Chemical Products (GB/T3723-1999, idt ISO3165:1976)

GB/T6680 General Rules for Sampling of Liquid Chemical Products

GB/TG682 Analytical laboratory water specifications and test methods (GB/T6682-2008, ISO 3696: 1987.

GB/T8170 Numerical rounding rules

3 Method summary

Under the action of acetic anhydride , the peroxide in the sample reacts with potassium iodide to generate yellow iodide triion (I ^3- )

4 Instruments

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11 Separation funnel; 1000mL;

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12 All-glass distillation system;

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13 Chromatography column: the inner diameter of the solution column is 40mm, and the length of the solution column is 400mm.
It has sand core filter and active cold.
A mark is made at 235mm from the sand core filter
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