安捷伦7890B非甲烷总烃气相色谱仪进样装置应用HJT 38-1999 HH-790NMHC-GC

固定污染源排气中非甲烷总烃的测定 气相色谱法
Stationary source emission-Determination of nonmethane hydrocarbons-Gas chromatography
( HJ/T 38-1999　　　 2000-01-01实施)

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非甲烷总烃（NMHC）测定。 
1.2 NMHC的检出限为4×10-2ng。当色谱进样量为1.0ml时，方法的检出浓度为4×10-2mg/m3，方法的定量测定浓度范围为0.12～32mg/m3。

2 定义：
非甲烷总烃（NMHC）：指除甲烷以外的碳氢化合物（其中主要是C2~C8）的总称。在本标准规定的条件下所测得的NMHC，是于气相色谱氢火焰离子化检测器有明显响应的、除甲烷外碳氢化合物总量，以碳计。

3 方法原理

用双柱双氢火焰离子化检测器气相色谱仪，注射器直接进样，分别测定样品中的总烃和甲烷总量，以两者之差得非甲烷总烃含量。同时以除烃空气求氧的空白值，以扣除总烃色谱峰中的氧峰干扰。

名称：非甲烷总烃进样装置
型号：HH-790NMHC-GC
应用：HJ／T381999固定污染源排气中非甲烷总烃的测定气相色谱法

配置：进样装置，加热系统，色谱柱，气路系统，输出

适用于：安捷伦7890，岛津2018，赛默飞，瓦里安，PE，布鲁克等
安装简单，方便，快捷
浩瀚色谱，提供方法的分析方案
 
Determination of non methane total hydrocarbons in exhaust gas from fixed pollution sources - Gas chromatography method

Stationary source emission-Determination of nonmethane hydrocarbons-Gas chromatography

(Implementation of HJ/T 38-1999, 2000-01-01)



1 Scope of application

1.1 This standard is applicable to the determination of non methane total hydrocarbons (NMHC) in both organized and unorganized emissions from fixed pollution sources.  

The detection limit of 1.2 NMHC is 4 × 10-2ng。 When the chromatographic injection volume is 1.0ml, the detection concentration of the method is 4 × 10-2mg/m3, the quantitative determination concentration range of the method is 0.12-32mg/m3.



2 Definition:

Non methane total hydrocarbons (NMHC): Refers to the general term for hydrocarbons (mainly C2-C8) other than methane. The NMHC measured under the conditions specified in this standard is the total amount of hydrocarbons, excluding methane, with a clear response from the gas chromatography hydrogen flame ionization detector, measured in carbon.



3 Method principles



Using a dual column dual hydrogen flame ionization detector gas chromatograph and a syringe for direct injection, determine the total hydrocarbons and total methane in the sample, and calculate the non methane total hydrocarbon content based on the difference between the two. At the same time, calculate the blank value of oxygen using hydrocarbon free air to deduct the interference of oxygen peaks in the total hydrocarbon chromatographic peaks.



Name: Non methane total hydrocarbon injection device

Model: HH-790NMHC-GC

Application: HJ/T381999 Determination of non methane total hydrocarbons in fixed source exhaust gas by gas chromatography



Configuration: Injection device, heating system, chromatographic column, gas path system, output



Applicable to: Agilent 7890, Shimadzu 2018, Thermo Flyer, Varian, PE, Brooke, etc

Easy, convenient, and fast installation

Vast chromatography, providing analytical solutions for methods