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1 Scope
This standard specifies the use of gas chromatography to determine the content of trace hydrogen in industrial ethylene and propylene
This standard is applicable to the determination of hydrogen content in industrial ethylene and propylene at a concentration of not less than 1mL/m 3 (packed column) or 2mL/m (capillary column)
This standard is not intended to describe all safety issues related to its use.
2 Normative references
The clauses in the following documents have become clauses of this standard after being quoted in this standard.
GB/T3723 General rules for the safety of sampling of industrial chemical products (GB/T3723-1999, idt ISO 3165:1976)
GB/T8170 Numerical rounding rules and the expression and judgment of limit values
GB/T13289 Industrial ethylene liquid and gas sampling method (GB/T13289-1991, neq ISO 7382: 1986)
GB/T13290 Industrial Propylene and Butadiene Liquid Sampling Method (GB/T13290-1991, neq ISO 8563: 1987)
3 Method summary
Under the conditions specified in this standard, the gas (or liquid after vaporization) sample is carried by the carrier gas into the chromatographic column through the sampling device
4 Reagents and materials
4.
Nitrogen , purity (volume fraction) ≥99.
4.
Ethylene; purity (volume fraction) is not less than 99.
Ammonia: the purity (volume fraction) is not less than 99.
Hydrogen: the purity (volume fraction) is not less than 99.
4.
The hydrogen standard sample can be purchased from the Shan market or prepared by yourself.