浩瀚色譜（山東）應(yīng)用技術(shù)開發(fā)有限公司，建立了大氣和海水中揮發(fā)性硫化物的氣相色譜分析方法,確定了最佳實(shí)驗(yàn)條件。為了適應(yīng)不同的基質(zhì)和保存方式,大氣和海水樣品采用了不同的分析方法。測(cè)定大氣樣品時(shí),采用大氣采樣罐及三級(jí)冷阱預(yù)濃縮氣相色譜-質(zhì)譜聯(lián)用技術(shù),而海水樣品采用吹掃捕集-氣相色譜測(cè)定。本方法測(cè)定大氣揮發(fā)性硫化物的線性范圍較好,精密度為7.7%~15.1%,檢出限為0.23~4.7 ng;海水中揮發(fā)性硫化物的精密度為3.5%~5.3%,檢出限為2.5~3.5 ng。將本方法用于近海海水和大氣中硫化物的測(cè)定,測(cè)得海水中羰基硫、二甲基硫和二硫化碳的平均濃度分別為(268±58)pmol/L、(1264±0.2)pmol/L、(19±2)pmol/L,大氣中的平均濃度為543±39、39±9和56±20(×10~(-12),V/V)。本方法可準(zhǔn)確測(cè)定海洋環(huán)境中的揮發(fā)性硫化物。
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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(shí)測(cè)定。氣相色譜儀的火焰光度檢測(cè)器（GC-FPD）對(duì)四種成分的檢出限為0.2×10～1.0×10g，當(dāng)氣體樣品中四種成分濃度高于1.0mg/m時(shí)，可取1～2mL氣體樣品直接注入氣相色譜儀分析。對(duì)1L氣體樣品進(jìn)行濃縮，四種成分的方法檢出限分別為0.2×10～1.0×10mg/m。
名稱：填充柱
型號(hào)：25%β, β-氧二丙腈/chromosorb-G(60~80 目)
規(guī)格：3m*1/8
使用溫度：100°C
編號(hào)：20240131001
應(yīng)用：GB/T 14678-1993 空氣質(zhì)量 硫化氫、甲硫醇、甲硫醚和二甲二硫的測(cè)定 氣相色譜法
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Haohan Chromatography (Shandong) Application Technology Development Co., Ltd. has established a gas chromatography analysis method for volatile sulfides in the atmosphere and seawater, and determined the optimal experimental conditions. In order to adapt to different matrices and storage methods, different analytical methods were used for atmospheric and seawater samples. When measuring atmospheric samples, the atmospheric sampling tank and three-stage cold trap pre concentration gas chromatography-mass spectrometry technology are used, while the seawater samples are measured by blow trap gas chromatography. This method has a good linear range for the determination of atmospheric volatile sulfides, with a precision of 7.7%~15.1% and a detection limit of 0.23~4.7 ng; The precision of volatile sulfides in seawater is 3.5%~5.3%, and the detection limit is 2.5~3.5 ng. This method was applied to the determination of sulfides in nearshore seawater and atmosphere. The average concentrations of carbonyl sulfur, dimethyl sulfur, and carbon disulfide in seawater were measured to be (268 ± 58) pmol/L, (1264 ± 0.2) pmol/L, and (19 ± 2) pmol/L, respectively. The average concentrations in the atmosphere were 543 ± 39, 39 ± 9, and 56 ± 20, respectively（ × 10~(-12), V/V). This method can accurately determine volatile sulfides in marine environments.
This method is applicable for the simultaneous determination of hydrogen sulfide, methyl mercaptan, methyl sulfide, and dimethyl disulfide in the exhaust of odor pollution sources and ambient air. The detection limit of the flame photometric detector (GC-FPD) of the gas chromatograph for four components is 0.2 × 10-1.0 × When the concentration of the four components in the gas sample exceeds 1.0mg/m, 1-2mL of the gas sample can be directly injected into the gas chromatograph for analysis. Concentrate 1L gas sample with detection limits of 0.2 for each of the four components × 10-1.0 × 10mg/m.
Name: Filled Column
Model: 25% β, β- Oxypropionitrile/chromosorb-G (60-80 mesh)
Specification: 3m * 1/8
Operating temperature: 100 ° C
Number: 20240131001
Application: GB/T 14678-1993 Air Quality - Determination of Hydrogen Sulfide, Methylthiol, Methyl Sulfide, and Dimethyl Disulfide - Gas Chromatography
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