Determination of Trace Benzene in Industrial Styrene—Gas Chromatography (1)

1 Scope

This section specifies the use of gas chromatography to determine the content of trace benzene in industrial styrene

This section applies to the determination of benzene in the range of 0.

This section is not intended to explain the safety issues related to its use.

Note: Styrene monomer is flammable

2 Normative references

The clauses in the following documents become clauses of this part after being quoted in this part of GB/T12688

GB/T 3723 General Rules for Sampling Safety of Industrial Chemical Products (GB/T3723-1999, ISO3165:1976, idt)

GB/T 6680 General Rules for Samples of Liquid Chemical Products

GB/T 8170 Numerical Rounding Rules and the Expression and Judgment of Limit Values

3 Principles of the method

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Inject an appropriate amount of sample into a gas chromatograph equipped with two capillary columns and a switching valve.

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Inject an appropriate amount of sample into a gas chromatograph equipped with heart-cutting technology and dual FID detectors.

4 Reagents and materials

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8 n-nonane : the purity (mass fraction) is not less than 99%
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Related links: Determination of polymerization inhibitor (p-tert-butylcatechol) in styrene for industrial use.
Spectrophotometric method (2)