摘要
采用吹扫捕集/气相色谱—质谱(GC-MS)法测定水中26种挥发性有机物(VOCs),并对吹扫捕集条件进行优化,分析了吹扫温度和吹扫时间、解吸温度和解吸时间对吹扫捕集效率的影响.分析结果表明,在此条件下,挥发性有机物的线性相关系数为0.999 0～0.999 9,平均加标回收率为94.0%～108.3%,相对标准偏差为2.4%～6.1%,具有较好的线性关系,准确度和精密度;方法检出限为0.03～0.28μg/L,远低于《地表水环境质量标准》(GB 3838-2002)中限值.
Purge and trap/gas chromatography-mass spectrometry was used to determine 26 volatile organic compounds （VOCs） in water, and the conditions of the method were optimized. The influences of purge temperature, purge time, desorption temperature and desorption time on the efficiency of purge and trap were analyzed. Under the optimized conditions, this method had good linear relations, accuracy and preci- sion, with a linear correlation coefficient of VOCs of 0. 999 0-0. 999 9, an average recovery of 94. 0%- 108.3%, a relative standard deviation of 2. 4%-6.1% and a detection limit of 0.03-0. 28нg/L, which is much lower than the mid-limited value stipulated in Environmental Quality Standards for Surface Water （GB 3838-2002）.
出处
《西南大学学报（自然科学版）》
CAS
CSCD
北大核心
2013年第3期146-151,共6页
Journal of Southwest University(Natural Science Edition)
基金
重庆市科技攻关项目(cstc2012gg-sfgc40002)
关键词
吹扫捕集
气相色谱—质谱
挥发性有机物
水
purge and trap
GC-MS （gas chromatography-mass spectrometry）
volatile organic com-pound
water
