摘要
Abstract
Objective： To establish a novel method for determining the contents of polybrominated diphenyl ethers（BDE-47 and BDE-99） in drinking water by solid phase extraction（SPE） or solid phase micro extraction（SPME） combined with gas chromatography（GC）.Methods： In the SPE-GC method,100 mL of water sample was purified by LC-C18 SPE column chromatography through elution with hexane.The eluent was evaporated to dryness in water bath at 80℃,and the remaining residue was re-dissolved with isooctane and made up to 1 mL.Finally,1μL of the solution was injected into GC for the determination.The limits of detection（LOD） for BDE-47 and BDE-99 were 0.0008μg/L and 0.0009μg/L（RSN= 6）,respectively,the regression equations showed good linearity with a correlation coefficient of 0.9996 and 0.9997,respectively,and the RSDs for 6 replicate determinations were in the range of 1.0%-4.9% and 0.96%-4.4%,respectively.In the SPME-GC method,10 mL of water sample was placed into a 15-mL SPME bottle and adsorbed by solid-phase micro-extraction for 25 min at 40 ℃ with a rotation speed of 1150 r/min.Then,the fiber was air-dried,immediately followed by GC analysis.The LODs of the SPME-GC method for BDE-47 and BDE-99 were 0.0000μg/L and 0.0044μg/L（RSN = 6）,respectively,the linear correlation coefficients were 0.9996 and 09992,respectively,and the RSDs for 6 replicate determinations varied in the range of 6.7%-11.4% and 6.0%-10.1%,respectively.Results： BDE-47 and BDE-99 were undetected in 52 samples randomly collected from a certain city.Conclusion： Both analytical methods are characterized by simplicity,rapidity,high precision,good accuracy and satisfactory recovery rate.关键词
固相萃取/固相微萃取/气相色谱/多溴联苯醚/饮用水Key words
solid phase extraction/solid phase micro-extraction/gas chromatography/polybrominated diphenyl ethers/drinking water分类
医药卫生
