Industrial Acrylonitrile—Determination of Iron and Copper Content Spectrophotometric Method (1)

1 Scope

This section specifies the spectrophotometric method for the determination of iron and copper content in acrylonitrile for industrial use

This section applies to the determination of iron and copper content in industrial acrylonitrile samples with iron content greater than 0.

When the iron content exceeds 100 times the copper content, it will interfere with the determination of copper

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/T602 Standard Solution for Determination of Impurities in Chemical Reagents

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

GB/T3723 General rules for the safety of sampling of industrial chemical products (GB/T3723-1999, idtISO3165:1976)

GB/T6578 General Rules for Sampling of Chemical Products

GB/T6580 General Rules for Sampling of Liquid Chemical Products

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

GB/T8170 Numerical Rounding Rules

3 Security

3.

3.

4 General rules

Unless otherwise noted, all reagents are analytically pure, and the water used is in compliance with the third-grade water specifications of GB/T6682

The standard solutions, preparations and products used in the analysis shall be prepared in accordance with the provisions of GB/T602 and GB/T603 when other requirements are not specified

5 sampling

5.

5.