期刊
RSC ADVANCES
卷 12, 期 28, 页码 17675-17681出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/d2ra01010k
关键词
-
资金
- Scientific Grant Agency of the Ministry of Education of the Slovak Republic [1/0220/21]
- Slovak Academy of Sciences
A new design of headspace liquid phase microextraction with an optical immersion probe (HS-LPME-OIP) was developed for sulfide determination in wine and water samples. This method allows for online registration of the analytical signal and improves the reproducibility of sulfide determination.
A new design for headspace liquid phase microextraction in combination with an optical immersion probe (HS-LPME-OIP) was proposed and successfully tested for the determination of sulfide in wine and water samples. The developed method is based on the release of hydrogen sulfide from the aqueous phase after the addition of orthophosphoric acid and its extraction with an aqueous solution of 5,5 '-dithiobis-(2-nitrobenzoic) acid (DTNB). The analytical signal was recorded using an optical probe immersed in a vial containing 200 mu L of 0.1 mM DTNB solution. Using the optical immersion probe in combination with HS-LPME allowed to register the analytical signal online and significantly improve the reproducibility of sulfide determination compared to known microextraction approaches. In the proposed approach, the problems with drop stability, limitations in mixing rate or extraction time, too small volume of the acceptor phase and stability of the holding the acceptor phase in the hole of the optical probe were also satisfactorily solved. The calibration graph was linear in the range of 16-256 mu g L-1 with a correlation coefficient of 0.9992. The limit of detection was 6 mu g L-1.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据