5%Carbowax 20M Carbopack B填充柱 检测车间空气中甲醇的气相色谱法

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检测车间空气中甲醇的气相色谱法
检测车间空气中甲醇的气相色谱法 详细信息:

名称：填充柱

色谱固定液：5%聚乙二醇
载体：石墨炭黑80-120目

规格：2m*3mm，2m*1/8

型号：5%Carbowax 20M Carbopack B

应用： HJ T33-1999 固定污染源排气中甲醇的测定气相色谱法

对车间空气中甲醇浓度的测定,在《车间空气监测检验方法》(以下称标准法)中介绍了两种方法,一是变色酸比色法,一是气相色谱法。

浩瀚色谱（山东）应用技术开发有限公司通过实验和应用,认为比色法不够理想,不但准确度差,而且精密度也很差,平行误差高达±20—30%,或更高;所用试剂易变质失效。标准法中的气相色谱法采用气体直接进样。由于注射器的毛玻璃对甲醇的吸附作用,以及仪器的灵敏度所限,我们认为气体直接进样不利于实际.

检测车间空气中甲醇的气相色谱法  测试谱图：



Gas Chromatography Method for Detecting Methanol in Workshop Air
Gas Chromatography for the Detection of Methanol in Workshop Air Details:

Name: Packed Column

Chromatographic fixative: 5% polyethylene glycol
Carrier: graphite carbon black 80-120 mesh

Specifications: 2m*3mm, 2m*1/8

Model: 5%Carbowax 20M Carbopack B

Application: HJ T33-1999 Determination of methanol in exhaust gas from stationary pollution sources by gas chromatography



For the determination of methanol concentration in workshop air, two methods are introduced in "Workshop Air Monitoring and Inspection Method" (hereinafter referred to as standard method), one is colorimetric acid colorimetry, and the other is gas chromatography.

Through experiments and applications, Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. believes that the colorimetric method is not ideal, not only in poor accuracy, but also in poor precision, and the parallel error is as high as ±20-30%, or higher; the reagents used are easy to metamorphic failure. Gas chromatography in the standard method uses direct gas injection. Due to the adsorption of methanol on the ground glass of the syringe and the limited sensitivity of the instrument, we believe that direct gas injection is not practical.

Gas chromatography for detecting methanol in workshop air Test spectrum: