原水中全氟辛烷磺酸的检测方法研究

摘要全氟辛烷磺酸（PFOS）以及相关的含氟化合物被广泛的用于工业和商业用途。然而最近他们正显示出生物累积性、毒性，最严重的是会对人类产生危害。本研究选取了两种衍生剂N，O-双（三甲基硅烷基）三氟乙酰胺（BSTFA）、原乙酸三乙酯（TEOA），分别研究了两种衍生剂与PFOS衍生化反应的最佳条件，以及在GC-ECD条件下的定性和定量分析。BSFFA作为衍生剂所建立的分析方法最低检出限为2.40g/L，精密度为4.2%，样品加标回收率为98.4%-113.9%。TEOA作为衍生剂所建立的分析方法最低检出限为3.60g/L，精密度为5.7％，样品加标回收率为87.4%-110.6%。并将该两种方法用于实际水样中微量PFOS的检测，测得水样中PFOS的浓度为0.02-0.22g/L。59868

毕业论文关键词全氟辛烷磺酸衍生化 BSTFA TEOA 气相色谱/ECD

毕业设计说明书（论文）外文摘要

Title Research on the Determination of Perfluorooctane Sulfonate in Water

Abstract

Perfluorooctane sulfonate (PFOS) and related fluorochemicals have an enormous number of industrial and commercial applications. However, some studies have shown that they are bioaccumulative and toxic. More importantly, they are ubiquitous in environment as well as in human. An analytical method to determine perfluorooctane sulfonate (PFOS) in water by chromatography (GC-ECD) was developed. N,O-Bis (trimethylsilyl) trifluoroacetamide (BSTFA) and Triethyl Orthoacetate (TEOA) were employed as derivating agents and comprehensively comparative experiments such as reaction time, temperature, reaction solvent and volume ratio of PFOS and derivating agent were investigated and optimized. Results showed detection limit, coefficient of varition and recoveries were 2.40 g/L, 4.2% and 98.4%-113.9% for the BSTFA-based method; 3.60 g/L, 5.7% and 87.4%-110.6% for the TEOA-based method, respectively. Both methods were applied for the determination of the trace concentration of PFOS in the natural water , which was 0.02-0.22g/L.

Key words Perfluorooctane sulfonate Derivatization BSTFA TEOA GC/ECD

1 引言 1

1.1 全氟辛烷磺酸 1

1.1.1 全氟辛烷磺酸的性质 1

1.1.2 全氟辛烷磺酸的作用及危害 1

1.2 国内外常用的PFOS的检测方法 2

1.2.1 高效液相色谱-质谱联用 2

1.2.2 高效液相色谱-串联质谱法 3

1.2.3 高效液相色谱/四级杆/飞行时间串连质谱法 3

1.2.4 气相色谱质谱联用/气相色谱 4

1.2.5其他检测技术 4

1.3 气相色谱衍生化 4

1.4 本实验研究的内容与意义 4

2 实验原理 5

2.1 气相色谱简介 5

2.1.1 电子俘获检测器ECD工作原理 5

2.1.2 电子俘获检测器ECD的性能 5

2.1.3 ECD的检测条件 6

2.2 地表水的监测 7

2.2.1 水样的采集和保存 7

2.2.2 水样的预处理原水中全氟辛烷磺酸的检测方法研究:http://www.751com.cn/huaxue/lunwen_65210.html