摘要
建立了漂浮液滴固化分散液液微萃取(DLLME-SFO)方法,以脂肪酸作为萃取剂,以甲醇作为分散剂,与高效液相色谱联用检测了环境水样中3种烷基苯酚。对影响前处理方法的因素进行了详细考察,在最佳萃取条件(60μL萃取剂辛酸、600μL分散剂甲醇、pH值为2.0~8.0、10 mL水样中加入0.5 g NaCl)下,3种烷基苯酚在20~1 500μg/L范围内具有良好的线性关系,相关系数不小于0.998 5,3种目标化合物的检出限为0.45~0.61μg/L,富集倍数为145~169,实际样品中3个水平的加标回收率为80.1%~109.9%。该方法将脂肪酸作为萃取剂,与HPLC联用实现了烷基苯酚的富集与检测,为环境水样中烷基苯酚的检测提供了对环境友好的前处理新方法。
A simple,rapid and eco-friendly method named dispersive liquid-liquid microextrac-tion based on solidification of floating organic drop (DLLME-SFO) was developed for the deter-mination of 2-tert- butyl-4-ethylphenol, 4-tert-octylphenol and 2,4-di-tert-butylphenol inwastewater samples coupled with high performance liquid chromatography-ultraviolet detection (HPLC-UV). Octanoic acid was served as extraction solvent,and methanol was selected as dis-persive solvent. The parameters affecting the extraction efficiency including the type and vol-ume of the extraction solvents and the dispersive solvents,the pH and the salt addition were optimized. Under optimum conditions,the linear range was 20-1 500 p^^L for all the three tar-get alkylphenols. Limits of detection (LODs, S/N =3) were in the range of 0.45-0.61 p^^L. The enrichment factors (EFs) varied from 145 to 169,and the recoveries at three spiked levels were in the range of 80. 1% -109. 9%. It demonstrated that fatty acids including octanoic acid and nonanoic acid could be used as extraction solvent in DLLME-SFO method. The method is suitable for the determination of alkylphenols in environmental water samples.
出处
《色谱》
CAS
CSCD
北大核心
2017年第5期533-537,共5页
Chinese Journal of Chromatography
基金
江苏省自然科学青年基金项目(BK20160922)
江苏省产学研前瞻性联合研究项目(BY2016006-02)~~
关键词
漂浮液滴固化分散液液微萃取
高效液相色谱
烷基苯酚
环境水
脂肪酸
dispersive liquid-liquid microextraction based on solidification of floating organic drop (DLLME-SFO)
high performance liquid chromatography (HPLC)
alkylphenols
environ- mental water
fatty acid