Low-Temperature and Atmospheric Pressure Sample Digestion Using Dielectric Barrier Discharge

Yijing Luo; Yuan Yang; Yao Lin; Yunfei Tian; Li Wu; Lu Yang; Xiandeng Hou; Chengbin Zheng

doi:10.1021/acs.analchem.7b04376

Low-Temperature and Atmospheric Pressure Sample Digestion Using Dielectric Barrier Discharge

Anal Chem. 2018 Feb 6;90(3):1547-1553. doi: 10.1021/acs.analchem.7b04376. Epub 2018 Jan 23.

Authors

Yijing Luo¹, Yuan Yang¹, Yao Lin¹, Yunfei Tian², Li Wu², Lu Yang³, Xiandeng Hou^{1

2}, Chengbin Zheng¹

Affiliations

¹ Key Laboratory of Green Chemistry & Technology of MOE, College of Chemistry, Sichuan University , Chengdu, Sichuan 610064, China.
² Analytical & Testing Center, Sichuan University , Chengdu, Sichuan 610064, China.
³ National Research Council Canada , 1200 Montreal Road, Ottawa, Ontario K1A 0R6, Canada.

PMID: 29303568
DOI: 10.1021/acs.analchem.7b04376

Abstract

A new sample digestion method using a double layer and coaxial dielectric barrier discharge (DBD) digestion reactor was developed for the sensitive determination of trace elements in rice samples. All the operation parameters of the DBD microplasma and other digestion conditions were carefully optimized. Three DBD-digestion modes were investigated for real matrix samples, including H₂O-DBD-digestion, H₂O₂-DBD-digestion, and HNO₃-DBD-digestion systems. Among the three modes, the H₂O-DBD-digestion system provides a suitable digestion of sample without any additional chemicals, achieving environmental friendly sample treatment and eliminating the potential interferences. Under the optimized conditions, limits of detection for Mg, Mn, Zn, Cd, Cr, Co, and As were in the range of 0.01-0.35 ng g^-1 by inductively coupled plasma mass spectrometry (ICPMS). The accuracy of the proposed method was checked by analysis of a certified reference material (GBW10043) and spiked samples with satisfactory results (83-113% recoveries).

Publication types

Research Support, Non-U.S. Gov't