摘要
应用吹扫捕集-气相色谱-质谱法测定土壤中27种挥发性有机物的含量。选定在25℃条件下吹扫捕集11min,取样品溶液5mL于吹扫瓶中,利用Tekmar Stratum吹扫捕集器直接进样,经TR-5MS毛细管色谱柱分离,电子轰击电离(EI)全扫描和选择离子扫描检测,内标法进行定量测定。27种挥发性有机物的质量浓度与其峰面积在一定的浓度范围内呈线性关系,方法检出限(3S/N)在0.077～0.69μg·kg^(-1)之间。样品加标平均回收率在86.5%～117.5%之间,相对标准偏差(n=7)在1.6%～8.2%之间。
The Tekmar Stratum purge and trap concentrator was used in GC-MS determination of 27 volatile organic compounds （VOC＇s） in soil. Temperature and time for purge and trap were set at 25 ℃ and 11 min respectively. Five mL. of sample solution were transferred to the purge and trap bottle and introduced into the instrument for GC-MS analysis. The VOC＇s were separated on the TR-5MS capillary column and detected by the modes of full-scanning and selective ion-scanning. Internal standard was adopted in the determinatiorL Linear relationships between peak areas and mass concentration of 27 VOC＇s were obtained in definite ranges, with detection limits （3S/N） in the range of 0. 077-0. 69 μg · kg^-1. Tests for recovery were made by addition of standard VOC＇s to sample matrixes; values of recovery obtained were in the range of 86. 5%- 117.5%. Values of RSD＇s （n=7） found for the VOC＇s were in the range of 1.6%-8. 2%.
出处
《理化检验（化学分册）》
CAS
CSCD
北大核心
2011年第8期937-941,共5页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
作者简介
李丽君（1972-），女，辽宁朝阳人，硕士，高级工程师，主要从事有机分析工作。
