Journal
TALANTA
Volume 233, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.talanta.2021.122516
Keywords
Dielectric barrier discharge; Atomic emission spectrometry; Hydride generation; Cadmium; Electrothermal vaporization
Categories
Funding
- National Natural Science Foundation of China [21775105]
- National Key Research and Development Program of China [2017YFD0801203]
- Ministry of Education of China through 111 project [B17030]
- Science & Technology Department of Sichuan Province [2019ZDZX0046]
- Fundamental Research Funds for the Central Universities
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The developed method utilizes a miniaturized dielectric barrier discharge microplasma atomic emission spectrometer coupled with a tungsten coil (W-coil) for on-line hydride generation trapping-electrothermal vaporization, resulting in fast, low-cost, and sensitive determination of trace cadmium. By adopting a horizontally fixed W-coil and flow injection mode, the total sample throughput can be greatly improved.
A fast, low-cost and sensitive method for the determination of trace cadmium was developed by using a miniaturized dielectric barrier discharge microplasma atomic emission spectrometer coupled with a tungsten coil (W-coil) for on-line hydride generation trapping-electrothermal vaporization. Total sample throughput can be greatly improved through the adoption of a horizontally fixed W-coil and the flow injection mode. In addition, the horizontally fixed W-coil and an inserted quartz capillary for on-line trapping contributed to stable and good signal even at a high gas flow rate when volatile cadmium species were trapped, and less sample-consuming and time-saving can be realized in this work. Compared to direct injection, the sensitivity and the LOD were improved by 29- and 38-fold, respectively. The proposed method provides a promising approach to develop a miniaturized instrumentation for highly sensitive detection of trace elements.
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