吹扫捕集/气相色谱-质谱联用仪测定饮用水水源地中的1,3-丁二烯和1-溴丙烷

Determination of 1,3-butadiene and 1-bromopropane in drinking water source by purge-trap/gas chromatography-mass spectrometry

使用吹扫捕集/气相色谱-质谱联用仪,采用SIM扫描模式对饮用水水源地中的1,3-丁二烯、1-溴丙烷进行了测定,并进行了方法学考察。结果表明,2种物质的线性范围良好,1,3-丁二烯、1-溴丙烷的相关系数分别为0.9999、0.9980;检出限分别为0.2和0.3μg/L,定量限分别为0.8和1.2μg/L;高、中、低3个浓度的相对标准偏差在2.6%~7.6%之间;高、中、低3个浓度实际样品的加标回收率在84.0%~122%范围内;替代物的加标回收率在70.4%~103%之间。该方法在本实验室具有较低的检出限、良好的线性和精密度、较高的正确度。

1,3-butadiene and 1-bromopropane in drinking water source were determinated by purge-trap/gas chromatography-mass spectrometry using the mode of SIM,and the methodology of this method was investigated.The results showed that,the linear range of the two pollutants was good,the correlation coefficients of 1,3-butadiene and 1-bromopropane were 0.9999 and 0.9980 respectively;the detection limits were 0.2 and 0.3μg/L respectively,and the quantitative limits were 0.8 and 1.2μg/L respectively.The relative standard deviations(RSD)of accuracy of high,middle and low concentrations were between 2.6%to 7.6%;and the standard recovery rates of the actual samples with high,middle and low concentrations ranged from 84%to 122%;while the standard recovery rates of the substitutes were 70.4%-103%.It showed that,the method has low detection limits,good linearity and precision,and high accuracy.