编号：CDUT-2023-4

标题：Impact of Gas−Liquid Interface on Photochemical Vapor Generation

入藏号：WOS:000623041000004

中国科学院文献情报中心期刊分区： 化学1区/TOP（2021年升级版）

本校作者： 余莹；陈瀚蛟；赵倩；牟青；董亮；施泽明；高英*；王瑞麟

来源出版物：ANALYTICAL CHEMISTRY  卷: 93  期: 7  页: 3343-3352

出版年：2021

第一地址： 成都理工大学

关键词：photochemical vapor generation; gas-liquid interfaces; inductively coupled plasma mass spectrometry; elements

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摘要：Interfacial effect has attracted increasing interest as the inherent asymmetric environment of a gas-liquid interface leads to different chemical and physical properties between this region and the bulk phase, resulting in enhanced chemical processes, specific reactions, and mass transfer at the interface. Photochemical vapor generation (PVG) is regarded as a simple and green sample introduction method in atomic spectrometry. However, the photochemical behavior of elements with the interface is not known. Herein, we report the PVG of elements at the gas-liquid interface along with a possible mechanism investigated for the first time. Enhancement and/or suppression effects from the gas-liquid interface were observed on the PVG of 17 elements, which was correlated with the properties of analytes and the generated intermediate substances/products of PVG and the applied conditions. Enhancement from 1.1- to 7.3-fold in analytical sensitivity was found for 12 elements in the system with gas-liquid interface(s) compared to the results obtained in previous reports of PVG using traditional flow injection with inductively coupled plasma mass spectrometry measurement. The introduction of gas-liquid interface(s) and the resultant elevated temperature inside the PVG reactor likely facilitated the generation of radicals, the subsequent radical-based reactions, and the separation/transport/detection of volatile species of elements. In contrast, intermediate substances/products generated in PVG with poor thermostability will readily decompose at elevated temperatures, leading to a decreased signal response of analytes. The finding is helpful to understand the transport of elements under UV irradiation in the environment and has potential for analysis of trace elements in environmental and biological samples.

文章链接地址: https://pubs.acs.org/doi/10.1021/acs.analchem.9b05634