Investigation of operational fundamentals for vacuum‐assisted headspace high‐capacity solid‐phase microextraction and gas chromatographic analysis of semivolatile compounds from a model solid sample

Author:

Thomas Shannon L.1,Myers Colton2,Herrington Jason S.2,Schug Kevin A.1ORCID

Affiliation:

1. Department of Chemistry and Biochemistry The University of Texas at Arlington Arlington Texas USA

2. Restek Corporation Bellefonte Pennsylvania USA

Abstract

Vacuum‐assisted headspace solid‐phase microextraction (Vac‐HS‐SPME) is a technique used to enhance SPME sampling of semi‐volatile organic compounds. Here, it was combined with a high‐capacity SPME Arrow, which features a larger volume of extraction phase and a more rugged configuration than traditional extraction fibers. An in‐depth assessment of the critical parameters was conducted to achieve optimal extraction of representative compounds from a model solid sample matrix (Ottawa sand). Operational fundamentals investigated included the types of seals needed to create a leak‐free environment under vacuum conditions; the magnitude of the vacuum applied and time needed to activate the Vac kinetics; order of sample vial preparation methods (VPMs); and other standard variables associated with extract analysis by gas chromatography‐mass spectrometry. When exploring the limits of sample VPMs, results indicated an ideal workflow requires the solid sample to be spiked before sealing the vial, allow the sample to rest overnight, then apply vacuum at a pressure of ‐677 mbar (out of ‐789 mbar maximum possible vacuum with pump and compressor used), exerted on the vial for 90 s. This work provides the necessary workflow for the optimization of Vac‐HS‐SPME sampling of analytes from solid matrices.

Publisher

Wiley

同舟云学术

1.学者识别学者识别

2.学术分析学术分析

3.人才评估人才评估

"同舟云学术"是以全球学者为主线,采集、加工和组织学术论文而形成的新型学术文献查询和分析系统,可以对全球学者进行文献检索和人才价值评估。用户可以通过关注某些学科领域的顶尖人物而持续追踪该领域的学科进展和研究前沿。经过近期的数据扩容,当前同舟云学术共收录了国内外主流学术期刊6万余种,收集的期刊论文及会议论文总量共计约1.5亿篇,并以每天添加12000余篇中外论文的速度递增。我们也可以为用户提供个性化、定制化的学者数据。欢迎来电咨询!咨询电话:010-8811{复制后删除}0370

www.globalauthorid.com

TOP

Copyright © 2019-2024 北京同舟云网络信息技术有限公司
京公网安备11010802033243号  京ICP备18003416号-3