用20% PEG-20M / GCS880 AW DMCS色谱柱测定固定污染源排气中的乙醛，主要依据的是我国的环境保护行业标准 《HJ/T 35-1999 固定污染源排气中乙醛的测定 气相色谱法》。这是一种经典可靠的气相色谱分析方法。
 

乙醛测定方法：20% PEG-20M / GCS880 AW DMCS 应用指南

方法概要

本方法适用于固定污染源有组织排放（如烟囱、排气筒）和无组织排放（如厂界环境）中乙醛的测定23。方法的*低检出限为0.04 mg/m³（当采样体积为100L，进样体积为1μL时），定量测定浓度范围为0.14 mg/m³ ~ 30 mg/m³23。

方法原理

该方法通过以下步骤完成乙醛的测定：

1. 采样：使用1%亚硫酸氢钠（NaHSO₃）溶液作为吸收液富集收集排气中的乙醛。乙醛与亚硫酸氢钠发生亲核加成反应，在中性溶液中生成稳定的α-羟基磺酸盐。

2. 样品释放：收集后的样品在稀碱溶液中共热，使上述加成产物逆向反应，释放出原始的乙醛。

3. 分离与测定：释放出的乙醛被引入气相色谱仪，经20% PEG-20M / GCS880 AW DMCS 色谱柱分离后，由氢火焰离子化检测器（FID） 进行检测。

4. 定量与定性：通过对比标准样品与待测样品的色谱峰保留时间进行定性分析，并采用峰高或峰面积进行定量分析。
   
    

   浩瀚色谱（山东）应用技术开发有限公司，研制生产的《 固定污染源排气中乙醛的测定岛津色谱柱》，样品中常见的甲醛、甲醇、乙醇、丙酮、甲酸、乙酸等有机物对乙醛的测定通常无干扰，柱效高，结果满意。

    

   名称：玻璃或不锈钢填充柱
   规格：2m*3mm
   型号：20% PEG-20M / GCS880 AW DMCS
   应用：HJ/T 35-1999 固定污染源排气中乙醛的测定 气相色谱法
   
    

   适用于：

   安捷伦490在线/便携，4890,5890,6890,7820,7890,8860,8890

   岛津GC-14C，GC-2010，GC-2014，GC-2030

   赛默飞1310,1300,1610,1600

   瓦里安3800系列

   布鲁克PE580,590,680,690

   磐诺A90，福立GC9790，华爱，天瑞，天美，GC7900，川仪，北分瑞利，东西电子，鲁南瑞虹，捷岛/科晓

    

The determination of acetaldehyde in fixed pollution source exhaust using a 20% PEG-20M/GCS880 AW DMCS chromatographic column is mainly based on China's environmental protection industry standard "HJ/T 35-1999 Determination of Acetaldehyde in Fixed Pollution Source Exhaust Gas Gas Chromatography Method". This is a classic and reliable gas chromatography analysis method.
Acetaldehyde determination method: 20% PEG-20M/GCS880 AW DMCS application guide
Method Summary
This method is applicable for the determination of acetaldehyde in organized emissions (such as chimneys and exhaust pipes) and unorganized emissions (such as factory environment) from fixed pollution sources. The minimum detection limit of the method is 0.04 mg/m ³ (when the sampling volume is 100L and the injection volume is 1 μ L), and the quantitative determination concentration range is 0.14 mg/m ³~30 mg/m ³.
Method principle
This method completes the determination of acetaldehyde through the following steps:
Sampling: Use a 1% sodium bisulfite (NaHSO3) solution as the absorbent to enrich and collect acetaldehyde in the exhaust gas. Acetaldehyde undergoes nucleophilic addition reaction with sodium bisulfite to form stable alpha hydroxy sulfonate in neutral solution.
Sample release: The collected sample is co heated in a dilute alkaline solution, causing the addition products to react in reverse and release the original acetaldehyde.
Separation and determination: The released acetaldehyde is introduced into a gas chromatograph, separated by a 20% PEG-20M/GCS880 AW DMCS column, and detected by a hydrogen flame ionization detector (FID).
Quantitative and qualitative analysis: Qualitative analysis is performed by comparing the retention time of chromatographic peaks between standard samples and test samples, and quantitative analysis is performed using peak height or peak area.
Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has developed and produced the Shimadzu chromatography column for the determination of acetaldehyde in exhaust gas from fixed pollution sources. Organic compounds such as formaldehyde, methanol, ethanol, acetone, formic acid, and acetic acid commonly found in the sample usually do not interfere with the determination of acetaldehyde, with high column efficiency and satisfactory results.
Name: Glass or Stainless Steel Filled Column
Specification: 2m * 3mm
Model: 20% PEG-20M/GCS880 AW DMCS
Application: HJ/T 35-1999 Determination of Acetaldehyde in Fixed Source Exhaust Gas Gas Chromatography Method
Suitable for:
Agilent 490 online/portable, 48905890689088608890
Shimadzu GC-14C, GC-2010, GC-2014, GC-2030
Thermo Fisher Scientific 1310130016101600
Varian 3800 Series
Brooke PE580590680690
Panno A90, Fuli GC9790, Huaai, Tianrui, Tianmei, GC7900， Chuanyi, Beifen Ruili, Dongxi Electronics, Lunan Ruihong, Jiedao/Kexiao