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HH一sulfide-III硫?qū)Ｓ弥?GB/T 14678-93 空氣質(zhì)量硫化氫、甲硫醇、甲硫醚和二甲二硫的測定

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GB/T 14678-93 空氣質(zhì)量硫化氫、甲硫醇、甲硫醚和二甲二硫的測定，芝麻香白酒，液化石油氣，二甲醚，甲縮醛，乙縮醛，乙醇，室內(nèi)空氣，焦爐煤氣，煉廠氣，天然氣，變壓器油，多氯聯(lián)苯

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GB/T 14678-93 空氣質(zhì)量硫化氫、甲硫醇、甲硫醚和二甲二硫的測定
GB/T 14678-93 空氣質(zhì)量硫化氫、甲硫醇、甲硫醚和二甲二硫的測定 詳細信息：

名稱：硫化物專用柱

固定相：專用

規(guī)格：3m*3mm

型號：HH一sulfide-III

應(yīng)用：硫化氫，羰基硫，二硫化碳，噻吩，甲硫醚，甲硫醇，乙硫醇，乙硫醚，二甲er硫等9種硫化物的測定

GB/T 14678-93 空氣質(zhì)量硫化氫、甲硫醇、甲硫醚和二甲二硫的測定 氣相色譜法
1 適用范圍

1.1 本方法適用于惡臭污染源排氣和環(huán)境空氣中硫化氫、甲硫醇、甲硫醚和二甲二硫的同時測定。氣相色譜儀的火焰光度檢測器(GC-FPD）對四種成分的檢出限為0.2×10-9~1. 0×10-9g，當氣體樣品中四種成分濃度高于1.0mg/m3時，可取1~2mL，氣體樣品直接注人氣相色譜儀分析。對1 L氣體樣品進行濃縮，四種成分的方法檢出跟分別為0.2×10-3~1.0×10-3mg/m3。

2 原理

本方法以經(jīng)真空處理的1 L采氣瓶采集無組織排放源惡臭氣體或環(huán)境空氣樣品，以聚酯塑料袋采集排氣筒內(nèi)惡臭氣體樣品。硫化物含量較高的氣體樣品可直接用注射器取樣1~2 mL,注入安裝火焰光度檢測器(FPD）的氣相色譜儀分析。當直接進樣體積中硫化物量低于儀器檢出．則需以濃縮管在以液氧為致冷劑的低溫條件下對1 L氣體樣品中的硫化物進行濃縮．濃縮后將濃縮管連入色譜儀分析系統(tǒng)并加熱100℃,使全部濃縮成分流經(jīng)色譜柱分離，由FPD對各種硫化物進行定量分析。在一定濃度范圍內(nèi)，各種硫化物含量的對數(shù)與色譜峰高的對數(shù)成正比。

GB/T 14678-93 Air quality Determination of hydrogen sulfide, methyl mercaptan, methyl sulfide and dimethyl disulfide
GB/T 14678-93 Air quality Determination of hydrogen sulfide, methyl mercaptan, methyl sulfide and dimethyl disulfide Detailed information:

Name: Special column for sulfide

Stationary Phase: Dedicated

Specifications: 3m*3mm

Model: HH-sulfide-III

Application: Determination of 9 kinds of sulfides such as hydrogen sulfide, carbonyl sulfide, carbon disulfide, thiophene, methyl sulfide, methyl mercaptan, ethyl mercaptan, ethyl sulfide, dimethyl sulfide, etc.

GB/T 14678-93 Air quality-Determination of hydrogen sulfide, methyl mercaptan, methyl sulfide and dimethyl disulfide-Gas chromatography
1 Scope of application

1.1 This method is suitable for the simultaneous determination of hydrogen sulfide, methyl mercaptan, methyl sulfide and dimethyl disulfide in the exhaust gas of odor pollution sources and ambient air. The flame photometric detector (GC-FPD) of the gas chromatograph has a detection limit of 0.2×10-9~1.0×10-9g for the four components. When the concentration of the four components in the gas sample is higher than 1.0mg/m3 1~2mL can be taken, and the gas sample is directly injected into the gas chromatograph for analysis. Concentrate 1 L of gas sample, and the detection rate of four components is 0.2×10-3~1.0×10-3mg/m3 respectively.

2 Principles

In this method, foul gas or ambient air samples from fugitive emission sources are collected from a vacuum-treated 1 L gas collection bottle, and a polyester plastic bag is used to collect the malodorous gas samples in the exhaust cylinder. Gas samples with high sulfide content can be directly sampled with a syringe of 1-2 mL and injected into a gas chromatograph equipped with a flame photometric detector (FPD) for analysis. When the absolute amount of sulfide in the direct injection volume is lower than the detection limit of the instrument. Then, it is necessary to concentrate the sulfide in 1 L gas sample under the low temperature condition with liquid oxygen as the refrigerant by the concentrating tube. After the concentration, the concentration tube is connected to the chromatographic analysis system and heated to 100 °C, so that all the concentrated components are separated through the chromatographic column, and various sulfides are quantitatively analyzed by FPD. Within a certain concentration range, the logarithm of the various sulfide content is proportional to the logarithm of the chromatographic peak height.