【摘要】 采用气相色谱–离子迁移谱技术，建立了检测畜禽有机废物堆肥中挥发性硫化合物–甲硫醚、乙硫醚、二甲基二硫醚和二硫化碳的方法。样品经除氨后用采气袋收集，经MXT-1气相色谱填充柱分离，采用正、负两种模式，在优化的载气流量和系统温度条件下进行检测。结果表明，4种挥发性硫化合物在各自线性范围内均表现出良好的线性关系(R~2>0.99)；检出限为0.008～0.097 mg/m~3，回收率为85%～116%，相对标准偏差(Relative Standard Deviation,RSD)为1.13%～8.42%。该方法无需浓缩富集等预处理，仅采用气袋就可完成堆肥恶臭气体的收集，检测灵敏、响应快速，可用于堆肥气体中挥发性硫化合物的现场监测。更多还原

【Abstract】 A method for determination of volatile sulfur compounds-dimethyl sulfide, diethyl sulfide, dimethyl disulfide, and carbon disulfide in livestock waste compost was established using gas chromatography–ion mobility spectroscopy technology. The sample was collected using a gas sampling bag after ammonia removal, separated on a packed gas chromatography column of MXT-1, and detected in both positive and negative modes under the optimized experimental conditions. The results showed that the four sulfur compounds represented good linearity(R~2>0.99) in their respective linear ranges; the detection limits were 0.008～0.097 mg/m~3 with recoveries of 85%～116% and relative standard deviation(RSD) of 1.13%～8.42%. The method is free of pretreatment such as pre-concentration or enrichment, sensitive and rapid, and the collection of odorous composting gas can be conducted using a gas sampling bag. The method is sensitive and rapid, which can be used for on-site monitoring of volatile sulfur in compost gas.更多还原