摘要
采用PTA-OH为衍生化试剂,对酚类内分泌干扰物的衍生化条件进行了优化,并在优化条件下,利用固相萃取-羟基衍生化-气相色谱/质谱法检测了滇池水体中酚类内分泌干扰物的浓度.结果表明,目标物PTA-OH衍生化在乙酸乙酯中、20℃条件下衍生化5min可达到最佳衍生化效果,衍生化后酚类内分泌干扰物的GC/MS检测限达到0.1pg.μl-1,检测范围为20—1000pg.μl-1;滇池水体中的辛基酚的浓度为ND—56.5ng.l-1;枯烯基酚的浓度为23.5—48.5ng.l-1;壬基酚的浓度为13.6—141.6ng.l-1;双酚A的浓度为ND—4713.6ng.l-1.滇池水体中4种酚类内分泌干扰物普遍存在,其中双酚A的污染较严重.
Phenyltrimethylammonium (PTA-OH) was used to derivatize phenolic endocrine disrupting chemicals (EDCs) and its derivatization conditions were tested. The optimized derivatization conditions were then used in a solid phase extraction-hydroxyl derivatization-GC/MS method for simultaneous determination of target phenols in surface water of Dianchi Lake. The results showed that the optimum derivatization conditions for derivatization with PTA-OH were ethyl acetate as solvent at 20℃ for 5min,and the instrumental detection limits for phenolic EDCs after derivatization was found to be 0.1pg·μl^-1 with a linear detection range from 20 to 1000pg·μl^-1. The concentrations of 4-tert-octylphenol (4-t-OP),4-cumylphenol (4-CP),4-nonylphenol (4-NP) and bisphenol A (BPA) in surface water of Dianchi Lake were ND—56.5ng·l^-1,23.5—48.5ng·l^-1,13.6—141.6ng·l^-1 and ND—4713.6ng·l^-1,respectively.This indicates the four phenolic EDCs are ubiquitously present in surface water of Dianchi Lake,among which BPA is dominant one.
出处
《环境化学》
CAS
CSCD
北大核心
2010年第4期744-748,共5页
Environmental Chemistry
基金
国家自然科学基金(20767002)
云南省自然科学基金(2007B035M)
教育部留学回国人员科研启动基金(教外司留[2008]890号)
关键词
酚类
内分泌干扰物
衍生化
气相色谱-质谱
滇池
phenols
endocrine disrupting chemicals
derivatization
gas chromatography-mass spectrometry (GC-MS)
Dianchi Lake.