摘要
目的：建立定量分析包装饮用水中双酚A的方法，并对北京市售包装饮用水进行检测。方法水样中的双酚A经supelclea0。”ENVITM-18固相萃取小柱富集、甲醇淋洗、氮气吹干、甲醇定容后，采用液相色谱-电喷雾离子阱质谱法进行定性、定量分析。结果：双酚A浓度在55-2200μg／L的线性范围内，二级质谱的回归方程为y=8619．8x-8700．2，相关系数为o．9999，检出限（S／N=3）为6ug／L。该方法的回收率为89．0％～104．8％，日内相对标准偏差（n-4）为2．4％-5．1％，日间相对标准偏差fn=3）为4．1％～8．1％。在随机检测的包装饮用水中，20种瓶装水中有8种检出双酚A，4种桶装水中均检出双酚A，但浓度远低于目前的生活饮用水标准。结论：本方法能简便、快速、准确地．枪测自．装蚀用水中的双酚A。
Purpose： To establish an analytical method for quantification of bisphenol A in packaged drinking water, and then to detect bisphenol A in packaged drinking water products sold in Beijing market. Methods： Bisphenol A was extracted from the packaged drinking water sample by a SupelcleanTM ENVITM- 18 column, eluted with methanol, dried by nitrogen flow and dissolved in methanol. The extract was analyzed by liquid chromatography-ion trap mass spectrometry with electrospray ionization. Results： In the concentration range of 55-2200 pg/L, the calibration curve of bisphenol A was linear, the linear equation was y=8619.8x-8700.2 with the correlation coefficient of 0.9999, and the detection limit was 6 pg/L. The recoveries from spiked samples ranged from 89.0% to 104.8%. Relative standard deviations of intra-day （n=4） and inter-day （n=3） were in the ranges 2.4%-5.1% and 4.1%-8.1%, respectively. 20 bottled drinking water products and 4 barreled drinking water products in the market were randomly analyzed by the proposed method. Bisphenol A was detected in 8 bottled drinking water products and all 4 barreled drinking water products, but the concentrations were all far below the limit concentration required in standards for drinking water quality（GB 5749--2006）. Conclusions： The method presented herein could quantify bisphenol A in packaged drinking water conveniently, quickly and accurately.
出处
《食品科技》
CAS
北大核心
2013年第9期282-286,共5页
Food Science and Technology
基金
科研基地-科技创新平台-首都经济贸易大学科学研究公共平台项目(00891262721922)
关键词
双酚A
液相色谱-质谱法
固相萃取
包装饮用水
bisphenol A
liquid chromatography-mass spectrometry
solid phase extraction
packaged drinking water
