Citation: ZHANG Lin, MA Ming-Ying, LI Bao-Qiang, KONG Jing-Lin, ZHANG Si-Chun, ZHANG Xin-Rong. Rapid Detection of Chemical Warfare Agent Simulants Using Gold Nanoparticles Substrate-assisted Enhanced Low Temperature Plasma-Mass Spectrometry[J]. Chinese Journal of Analytical Chemistry, ;2020, 48(10): 1416-1421. doi: 10.19756/j.issn.0253-3820.201146 shu

Rapid Detection of Chemical Warfare Agent Simulants Using Gold Nanoparticles Substrate-assisted Enhanced Low Temperature Plasma-Mass Spectrometry

1.
State Key Laboratory of NBC Protection for Civilian, Beijing 102205, China;
2.
Department of Chemistry, Tsinghua University, Beijing 100084, China

Received Date: 21 March 2020
Revised Date: 1 June 2020

The low temperature plasma (LTP) probe which can be used to quickly detect solid, liquid and gaseous samples has the characteristics of simple, fast and accurate, and easy to miniaturize. It has become a hot spot in the field of rapid detection of chemical warfare agents (CWAs). VX and HD have the characteristics of high toxicity, high boiling point and poor volatility. They are often dispersed on the surface of ground, equipment or clothing in the form of aerosols or droplets, which becomes a difficult problem for rapid detection on the spot. In this work, gold nanoparticles substrate-assisted low-temperature plasma-mass spectrometry was developed for rapidly detecting two CWA stimulants:malathion and 2-chloroethyl ethyl sulfide (CEES) in soil. Under the optimal conditions, the MS signal strength was improved by 7-9 times compared to the CWA simulants which were tested without the aid of gold nanoparticles. The experimental data of two simulants showed a good linear relationship between the signal and the concentration in the range of 5.0-1000 μg/g, with correlation coefficient (R²) of 0.9784 and 0.9915, and the limits of detection were 1.5 and 1.0 μg/g, respectively. The method could effectively improve the ionization efficiency of nonvolatile solid and liquid compounds through the interaction of gold nanoparticles and plasma. Also, the method was fast, accurate and sensitive, and had a good application prospect in the military field.
- Chemical warfare agents,
- Low temperature plasma probe,
- Ambient ionization mass spectrometry,
- Gold nanoparticles
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1.
沈阳化工大学材料科学与工程学院沈阳 110142