HH-624毛细管柱 水质 挥发性石油烃(C6-C9)的测定

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水质 挥发性石油烃(C6-C9)的测定
水质 挥发性石油烃(C6-C9)的测定 详细信息：

名称：毛细管柱
型号：HH-624（6%氰丙基苯基-94%甲基聚硅氧烷）
规格：30m*0.53mm*3.0um
zui高温度：260°C

1 适用范围

本标准规定了测定水中挥发性石油烃（C₆-C₉）的吹扫捕集/气相色谱法。

本标准适用于地表水、地下水、海水、生活污水和工业废水中挥发性石油烃（C₆-C₉) 的测定。

当取样量为10.0ml时，本标准测定的挥发性石油烃（C₆-C₉）方法检出限为0.02mg/L, 测定下限为0.08 mg/L。

当取样量为20.0ml时，本标准测定的挥发性石油烃（C₆-C₉）方法检出限为0.01mg/L, 测定下限为0.04 mg/L。

2 规范性引用文件

本标准引用了下列文件或其中的条款。凡是不注日期的引用文件，其有效版本适用于本标准。
GB 17378.3 海洋监测规范 第3部：样品采集、贮存与运输
HJ/T 91 地表水和污水监测技术规范
HJ/T 164 地下水环境监测技术规范

3 术语和定义

挥发性石油烃（C₆-C₉) volatile petroleum hydrocarbons

在本标准规定的条件下，在气相色谱图上保留时间介于2-甲基戊烷（包含）与n-C₁₀H₂₂ （不包含）之间的物质。

注：该定义下的挥发性石油烃（C₆-C₉）包括脂肪烃，脂环烃，芳香烃或烷基化的芳香烃等。

4 方法原理

样品中的目标化合物经高纯氮气吹扫后吸附于捕集管中，将捕集管加热并以高纯氮气反吹，被热脱附出来的组分经气相色谱柱分离后，用氢火焰离子化检测器（FID）检测，根据保留时间窗定性，外标法定量。

水质 挥发性石油烃(C6-C9)的测定 测试谱图：

Water quality Determination of volatile petroleum hydrocarbons (C6-C9)
Water quality Determination of volatile petroleum hydrocarbons (C6-C9) Details:

Name: Capillary Column
Model: HH-624 (6% cyanopropyl phenyl-94% methyl polysiloxane)
Specification: 30m*0.53mm*3.0um
Maximum temperature: 260°C


1 Scope of application

This standard specifies the purge and trap/gas chromatography method for the determination of volatile petroleum hydrocarbons (C6-C9) in water.

This standard applies to the determination of volatile petroleum hydrocarbons (C6-C9) in surface water, groundwater, seawater, domestic sewage and industrial wastewater.

When the sampling volume is 10.0ml, the detection limit of the volatile petroleum hydrocarbon (C6-C9) method determined by this standard is 0.02mg/L, and the lower limit of determination is 0.08 mg/L.

When the sampling volume is 20.0ml, the detection limit of the volatile petroleum hydrocarbon (C6-C9) method determined by this standard is 0.01mg/L, and the lower limit of determination is 0.04 mg/L.

2 Normative references

This standard refers to the following documents or their clauses. For undated reference documents, the effective version is applicable to this standard.
GB 17378.3 Marine Monitoring Specification Part 3: Sample Collection, Storage and Transportation
HJ/T 91 Technical specification for surface water and sewage monitoring
HJ/T 164 Technical Specification for Groundwater Environmental Monitoring

3 Terms and definitions

Volatile petroleum hydrocarbons (C6-C9) volatile petroleum hydrocarbons

Under the conditions specified in this standard, the retention time on the gas chromatogram is between 2-methylpentane (included) and n-C10H22 (not included).

Note: Volatile petroleum hydrocarbons (C6-C9) under this definition include aliphatic hydrocarbons, alicyclic hydrocarbons, aromatic hydrocarbons or alkylated aromatic hydrocarbons.

4 Principles of the method

The target compound in the sample is purged by high-purity nitrogen and adsorbed in the trapping tube. The trapping tube is heated and backflushed with high-purity nitrogen. After the thermally desorbed components are separated by a gas chromatography column, they are separated by a hydrogen flame Ionization detector (FID) detection, qualitative according to the retention time window, quantitative with external standard method.

Water quality Determination of volatile petroleum hydrocarbons (C6-C9) Test spectrum: