GDX-502玻璃柱 HJ/T 37-1999 固定污染源排气中丙烯腈的测定 气相色谱法

1 适用范围

1.1 本标准适用于固定污染源有组织排放和无组织排放的丙烯腈测定。

1.2 当采样体积为30L时，方法的检出限为0.2mg/m³。方法的定量测定浓度范围为0.26-33.0mg/m³。

2 方法原理

丙烯腈(CH₂＝CHCH₂CN）用活性炭常温吸附富集，再经二硫化碳常温解吸，解吸液中各组分通过色谱柱得到分离后进人氢火焰离子化检测器（FID)，从测得的丙烯腈色谱峰高（或面积），对解吸液中丙烯腈浓度定量，后由解吸液体积、浓度和采样体积计算出气体样品中丙烯腈的浓度。

HJ/T 37-1999 固定污染源排气中丙烯腈的测定 气相色谱法  测试谱图：


HJ/T 37-1999 Determination of acrylonitrile in exhaust gas from stationary pollution sources-Gas chromatography
HJ/T 37-1999 Determination of Acrylonitrile in Exhaust Gas from Stationary Pollution Source Gas Chromatography Details:

name: glass column
Specifications: 3m*3mm
Model: GDX-502, 60-80 mesh


1 Scope of application

1.1 This standard is applicable to the determination of acrylonitrile in the organized and unorganized emission of fixed pollution sources.

1.2 When the sampling volume is 30L, the detection limit of the method is 0.2mg/m3. The quantitative determination of the method is in the concentration range of 0.26-33.0 mg/m3.

2 Principles of the method

Acrylonitrile (CH2=CHCH2CN) is adsorbed and enriched with activated carbon at room temperature, and then desorbed by carbon disulfide at room temperature. The components in the desorbed liquid are separated by a chromatographic column and then entered into a hydrogen flame ionization detector (FID). The peak height (or area) is used to quantify the concentration of acrylonitrile in the desorbed liquid. Finally, the concentration of acrylonitrile in the gas sample is calculated from the volume, concentration and sampling volume of the desorbed liquid.

HJ/T 37-1999 Determination of Acrylonitrile in Exhaust Gas from Stationary Pollution Source Gas Chromatography Test Spectrum: