haohan空气及废气中的乙醛测定20%PEG-20M/GCS880 AW DMCS填充柱2m*3mm

浩瀚色谱（山东）应用技术开发有限公司用气相色谱法测定环境空气和工业废气中的乙醛。以1%NaHSO_3溶液富集吸收,以PEG-20M为固定液,GCS-880-AW-DMCS为载体,用氢焰离子化检测器进行色谱测定。研究了采样方法、样品保存和*佳色谱条件等。方法的采样效率不小于99.0％;精密度和准确度均较高;方法的*低检出浓度为0.04mg/m^3。

 

名称：填充柱
规格：2m*3mm（内径）
型号：20%PEG-20M/GCS880  AW DMCS（80-100目）

应用： HJ/T 35-1999 固定污染源排气中乙醛的测定 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乙醛测定。

1.2 当采样体积为100L，进样体积为1μL时，乙醛的检出限为4×10-2mg/m3，乙醛的定量测定浓度范围为0.14mg/m3-30mg/m3。

2 方法原理

用亚硫酸氢钠溶液采样，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a-羟基磺酸盐，然后在稀碱溶液中共热释放出乙醛，经色谱柱分离，用氢火焰离子化检测器测定，以标准样品色谱峰的保留时间定性，峰高定量。

 下列标准所包含的条文，通过在本标准中引用而构成为本标准的条文。

      GB 16297-1996 大气污染物综合排放标准

      GB 161157-1996 固定污染源排气中颗粒物测定和气态污染物采样方法

 除非另有说明，分析时均使用符合国家标准的分析纯试剂和不含有机物的蒸馏水。

不含有机物蒸馏水的制备：加入少量高锰酸钾的碱性溶液于普通的蒸馏水或去离子水中使呈红紫色，再进行蒸馏即得（在整个蒸馏过程中水应始终保持红紫色，否则应随时补加高锰酸钾）。

Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. uses gas chromatography to determine acetaldehyde in ambient air and industrial waste gas. 1% NaHSO_3 solution was used for enrichment and absorption, PEG-20M was used as fixed solution, GCS-880-AW-DMCS was used as carrier, and the chromatographic determination was carried out with hydrogen flame ionization detector. Sampling methods, sample preservation and optimal chromatographic conditions were studied. The sampling efficiency of the method is not less than 99.0%; the precision and accuracy are high; the minimum detection concentration of the method is 0.04 mg/m^3.


Name: Packed Column
Specifications: 2m*3mm (inner diameter)
Model: 20%PEG-20M/GCS880 AW DMCS (80-100 mesh)

Application: HJ/T 35-1999 Determination of acetaldehyde in exhaust gas from stationary pollution sources-Gas chromatography

1 Scope of application

1.1 This standard applies to the determination of acetaldehyde in organized and unorganized emissions from stationary sources.

1.2 When the sampling volume is 100L and the injection volume is 1μL, the detection limit of acetaldehyde is 4×10-2mg/m3, and the quantitative determination concentration range of acetaldehyde is 0.14mg/m3-30mg/m3.

2 Principles of the method

Sampling with sodium bisulfite solution, acetaldehyde and sodium bisulfite undergo nucleophilic addition reaction to generate stable α-hydroxysulfonate in neutral solution, and then release acetaldehyde by co-heating in dilute alkali solution. The chromatographic column is separated, and the hydrogen flame ionization detector is used for determination.

The following standards contain provisions which, through reference in this standard, constitute provisions of this standard.

GB 16297-1996 Comprehensive emission standard of air pollutants

GB 161157-1996 Determination of particulate matter in exhaust gas from stationary pollution sources and sampling methods for gaseous pollutants

Unless otherwise specified, analytical reagents that meet national standards and distilled water without organic substances are used in the analysis.

Preparation of organic-free distilled water: add a small amount of alkaline solution of potassium permanganate to ordinary distilled water or deionized water to make it red-purple, and then distill it (the water should always remain red-purple during the whole distillation process, otherwise it should be red-purple). Supplement potassium permanganate at any time).