浩瀚水质 挥发性石油烃C6-C9的测定采样管Tenaax

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。

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
 

名称：吸附管

规格：1/4*3.5
填料：200mg
形状：U，直管

型号：TENAX-TA

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 is applicable 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 specifications for surface water and sewage monitoring
HJ/T 164 Groundwater Environmental Monitoring Technical Specifications
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.

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

Name: Adsorption tube

Specification: 1/4*3.5
Filler: 200mg
Shape: U, straight pipe

Model: TENAX-TA 
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