Analysis of Six Volatile Fatty Acids in Air Using Dynamic Solid-phase Microextration-Gas Chromatography

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Analysis of Six Volatile Fatty Acids in Air Using Dynamic Solid-phase Microextration-Gas Chromatography

- Analysis of Six Volatile Fatty Acids in Air Using Dynamic Solid-phase Microextration-Gas Chromatography
- Vol. 35, Issue 12, Pages: 1611-1615(2016)
- 作者机构：
  
  1. 天津市环境保护科学研究院
  2. 国家环境保护恶臭污染控制重点实验室
  3. 天津迪兰奥特环保科技开发有限公司
- 作者简介：
- 基金信息：
- DOI：
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Analysis of Six Volatile Fatty Acids in Air Using Dynamic Solid-phase Microextration-Gas Chromatography. [J]. 35(12):1611-1615(2016)
DOI：

Analysis of Six Volatile Fatty Acids in Air Using Dynamic Solid-phase Microextration-Gas Chromatography. [J]. 35(12):1611-1615(2016) DOI：

摘要

建立了动态固相微萃取-气相色谱(FID)测定环境空气中挥发性脂肪酸(VFAs)的分析方法，选择乙酸(AA)、丙酸(PA)、丁酸(BA)、异丁酸(iso-BA)、戊酸(VA)和异戊酸(iso-VA) 6种代表性VFAs为研究对象，研制了动态萃取装置并建立了动态萃取机制。研究了固相微萃取材料、萃取时间、萃取温度、萃取流速、解析温度及时间对VFAs萃取效率的影响，在此基础上优化了气相色谱法检测条件。在优化条件下，6种脂肪酸的线性范围均达到4个数量级，相关系数均大于0.990。方法的检出限(S/N=3)为1.0~4.7 μg/L，相对标准偏差(RSD，n=3)为1.1%~6.8%。与常规方法相比，该方法大大提高了检测范围和检测灵敏度，并成功用于环境空气中挥发性脂肪酸的分析检测。

Abstract

An analytical method for the detection of volatile fatty acids(VFAs) was established.Acetic acid(AA)，propionic acid(PA)，butyric acid(BA)，iso-butyric acid(iso-BA)，valeric acid(VA) and iso-valeric acid(iso-VA) were chosen as the target，and a dynamic solid phase microextration(SPME) device was developed.The effects of extraction materials，extraction time，extraction temperature，extraction flow rate,extraction temperature and time of desorption were investigated on the efficiency of SPME extraction，and by which the optimal extraction conditions were determined.Furthermore，test conditions for gas chromatography were optimized,and a new dynamic SPME method was developed for gas chromatography ionization detection(GC-FID) to determine VFAs with the detection limits of 1.0-4.7 μg/L.The RSDs for three replicate extractions ranged from 1.1% to 6.8%，and the calibration curves were linear in the four orders of magnitude, with correlation coefficients(r2) more than 0.990.The developed method was successfully applied in the determination of trace VFAs in the environment.

关键词

挥发性脂肪酸动态固相微萃取气相色谱(GC)空气

Keywords

volatile fatty acidsdynamic solid-phase microextrationgas chromatography(GC)air

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