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采用凝固-漂浮分散液液微萃取(SFO-DLLME)技术联用高效液相色谱(HPLC)(二极管阵列检测器)法检测环境水样中的2-甲基萘、1-氯萘和1-溴萘。以低成本的正癸醇(密度:0.8287 g/cm3;凝固点:6℃)作为凝固-漂浮分散液液微萃取的萃取剂,讨论了分散剂类型和体积、萃取剂体积、萃取时间、离心时间和盐效应等因素对SFO-DLLME萃取效率的影响。在最优化条件下,2-甲基萘、1-氯萘和1-溴萘的检出限分别为0.09,0.10,0.24 ng/m L,线性范围为0.4~300 ng/m L,相对标准偏差(n=5)为1.5%~4.6%,对以上目标分析物的加标回收率为94.4%~106.2%。方法已应用于检测自来水和湖水中的2-甲基萘、1-氯萘和1-溴萘。
The content of 2-methylnaphthalene, 1-chloronaphthalene and 1-chloronaphthalene in aqueous samples were determined by solid-liquid phase-flow liquid-liquid microextraction (SFO-DLLME) combined with high performance liquid chromatography (HPLC) Bromine. Low-cost n-decanol (density: 0.8287 g / cm3; freezing point: 6 ℃) was used as the extractant for liquid-solid phase micro-extraction of liquid-floating dispersions. The effects of dispersant type and volume, extractant volume, extraction time, And salt effect and other factors on SFO-DLLME extraction efficiency. Under the optimized conditions, the detection limits of 2-methylnaphthalene, 1-chloronaphthalene and 1-bromonaphthalene were 0.09,0.10,0.24 ng / mL and the linear range was 0.4-300 ng / mL. The relative standard The deviations (n = 5) ranged from 1.5% to 4.6%. The spiked recoveries for the above target analytes ranged from 94.4% to 106.2%. The method has been applied to the detection of 2-methylnaphthalene, 1-chloronaphthalene and 1-bromonaphthalene in tap water and lake water.