便携式气相色谱-质谱联用仪现场测定畜禽粪便堆肥中挥发性有机物

采用便携式气相色谱-质谱联用仪进行了畜禽粪便堆肥排放气体中挥发性有机物质的现场分析.结果表明,在堆肥排放气体中可检测到含硫物质、脂肪烃、芳香烃及含氯有机物共20种物质.在已定量的8种物质中,CS2浓度最高,达到204 mg/m3；CS2和二甲二硫超过《恶臭污染物排放标准》(GB1455-93)的限值；SO2和苯超过《室内空气质量标准》(GB/T 18883-2002)的限值.本方法避免了常规检测中易出现的组分分解等问题,SO2测定值较常规方法提高59.3％.本方法操作方便,结果准确,适于对挥发性有机化合物的在线监测.

On-site Detection of Volatile Organic Compounds During Composting Treatment of Livestock and Poultry Manure by GC-MS

The volatile organic compounds in the odor released during the composting treatment of livestock and poultry manure were on-site detected by a portable GC-MS.Twenty kinds of organic components,including sulfur compounds,aliphatic hydrocarbons,aromatic hydrocarbons and chlorinated organic compounds,were detected.In the eight quantified substances,carbon disulfide was the most,up to 204.24 mg/m3;the values of carbon disulfide and dimethyl disulfide exceeded the standard in Emission Standard for Odor Pollutants and the values of sulfur dioxide and benzene exceeded the standard in Indoor Air Quality Standard,respectively.This method can avoid the component decomposition and achieve an increase by 59.3% in the measured value of sulfur dioxide when compared to the conventional method.This method is simple,rapid and reproducible and can be used for the on-site detection of the volatile organic compounds.The results of this study also provide the basic data for risk analysis of pollutants and establishment of corresponding standards.