浩瀚色谱采用大气预浓缩仪-GC/FPD建立了环境空气中7种含硫化合物的测定方法。结果表明,经惰性化改造后的大气预浓缩仪-GC/FPD测定系统的基线低,对硫化物无残留。7种化合物的线性回归方程的相关系数均在0.995以上,高、中、低3种浓度的空白加标回收率分别为98.6%105.3%、99.1%103.7%、85.7%99.7%,除硫化氢的相对标准偏差为10.9%外,其余6种含硫化合物的相对标准偏差可控制在6.9%以内。当进样体积为400 m L时,方法的检出限在0.101.1 ng/m3。CO2、H2O对实际样品的测定无干扰。因此,该方法能够满足目前监测工作的要求,更加适用于环境空气中痕量含硫化合物的测定。

　　名称:填充柱

　　型号:25%β,β-氧二丙腈/chromsorbG(60~80目)

　　规格:3m*3mm

　　*高使用温度:120°C

　　编号:20240613009

　　应用:GB-T 14678-1993 空气质量 硫化氢、甲硫醇、甲硫醚和二甲二硫的测定 气相色谱法

　　适用于安捷伦6890,7890,7820,8860,8890

　　Haohan Chromatography established a method for the determination of 7 sulfur-containing compounds in ambient air using an atmospheric pre concentration instrument GC/FPD. The results showed that the baseline of the atmospheric pre concentration instrument GC/FPD determination system after inerting modification was low and there was no residue of sulfides. The correlation coefficients of the linear regression equations for seven compounds are all above 0.995. The blank spiked recovery rates for high, medium, and low concentrations are 98.6% 105.3%, 99.1% 103.7%, and 85.7% 99.7%, respectively. Except for hydrogen sulfide, the relative standard deviation of the other six sulfur-containing compounds can be controlled within 6.9%. When the injection volume is 400 m L, the detection limit of the method is 0.101.1 ng/m3. CO2 and H2O have no interference with the determination of actual samples. Therefore, this method can meet the requirements of current monitoring work and is more suitable for the determination of trace sulfur-containing compounds in ambient air.

　　Name: Filled Column

　　Model: 25% β, β - Oxypropionitrile/chromsorbG (60-80 mesh)

　　Specification: 3m * 3mm

　　*High operating temperature: 120 ° C

　　Number: 20240613009

　　Application: GB-T 14678-1993 Air Quality Determination of Hydrogen Sulfide, Methylthiol, Methyl Sulfide and Dimethyl Disulfide Gas Chromatography

　　Applicable to Agilent 68907890782088608890