GB/T 30518-2014 in English

《GB/T 30518-2014液化石油气中可溶性残留物的测定 高温气相色谱法》由TC280（全国石油产品和润滑剂标准化技术委员会）归口，TC280SC1（全国石油产品和润滑剂标准化技术委员会石油燃料和润滑剂分会）执行，主管部门为国家标准化管理委员会。
本标准规定了测定液化石油气(LPG)中可溶性残留物含量的试验方法,测定范围是40mg/kg~100mg/kg,如果残留物含量更高可通过调整试样量来控制。
注:残留物含量在40mg/kg~100mg/kg范围外的也可使用本标准进行测定,但精密度在残留物含量20mg/kg~100mg/kg范围之外并未进行考察,其适用性未经验证。
可溶性残留物的测定是将试样在环境温度下挥发,在105℃烘干后,用气相色谱进行检测。
本标准不适于固体样品及高分子聚合物(>1000g/mol)的测定。

1 Scope

This standard specifies the test method for determination of dissolved residues content in liquefied petroleum gas (LPG); the determination range is 40~100mg/kg and may be controlled through adjusting the sample quantity if the residues content is higher.
Note: residues with content beyond the range of 40~100mg/kg may be determined through this standard, but the precision beyond the residues content range of 20~100mg/kg is not inspected and its applicability is not verified.
Determination of dissolved residues refers to volatilize the sample under environmental temperature and dry at 105℃ and then inspect with gas chromatography.
This standard is not applicable to the determination of solid sample and high molecular polymer (>1000g/mol).

2 Normative References

The following documents are indispensable for the application of this document. For dated references, only the edition cited applies. For undated references, the latest edition of the normative document (including any amendments) applies.
SH/T 0233 Sampling Method of Liquefied Petroleum Gas

3 Terms and Definitions

For the purposes of this document, the following term and definition applies.
3.1
Liquefied petroleum gases; LPG
The petroleum gas which can be stored and treated in liquid form under appropriate pressure and environmental temperature; its main component is propane, butane and a small amount of propylene, butylene, pentane and (or) pentene.

Foreword I
Introduction II
1 Scope
2 Normative References
3 Terms and Definitions
4 Summary of Test Method
5 Reagents and Materials
6 Apparatus
7 Sampling
8 Test Procedure
9 Calculation
10 Report
11 Precision
Appendix A (Informative) Comparison of Chapter and Article Numbers between this Standard and EN 15470:2007
Appendix B (Normative) Sample Transfer and Evaporation Equipment
Appendix C (Informative) Examples of Gas Chromatography Test
Bibliography