土质.用气相色谱法测定C10至C40范围内的烃含量

[中文适用范围]： 本标准规定了气相色谱法定量测定田间潮湿土壤样品中矿物油（烃）含量的方法。 该方法适用于以干物质表示的矿物油含量（质量分数）在100 mg/kg至10 000 mg/kg之间的土壤，并可适应较低的检测限。 本标准适用于沸程为175℃～525℃的所有烃类、C10H22～C40H82的正烷烃、异烷烃、环烷烃、烷基苯、烷基萘和多环芳香族化合物的测定，前提是它们是在净化过程中没有被指定的色谱柱吸收。 本标准不适用于汽油中 [外文原描述]： ISO 16703:2004 specifies a method for the quantitative determination of the mineral oil (hydrocarbon) content in field-moist soil samples by gas chromatography. The method is applicable to mineral oil contents (mass fraction) between 100 mg/kg and 10 000 mg/kg soil, expressed as dry matter, and can be adapted to lower detection limits. ISO 16703:2004 is applicable to the determination of all hydrocarbons with a boiling range of 175 °C to 525 °C, n-alkanes from C 10 H 22 to C 40 H 82 , isoalkanes, cycloalkanes, alkylbenzenes, alkylnaphthalenes and polycyclic aromatic compounds, provided that they are not absorbed on the specified column during the clean-up procedure. ISO 16703:2004 is not applicable to the quantitative determination of hydrocarbons < C 10 originating from gasolines. On the basis of the peak pattern of the gas chromatogram obtained, and of the boiling points of the individual n-alkanes listed in Annex B, the approximate boiling range of the mineral oil and some qualitative information on the composition of the contamination can be achieved.