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Pretreatment Method for Chloramine-T Decon Sample Before GC Analysis of HD and VX

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Abstract

Chloramine-T, especially its solution in weak acidity, is one of the decontaminants for chemical warfare agents (CWAs), HD, and VX. A high CWAs recovery from decontamination (decon) sample via pretreatment was essential for evaluating decontamination effects. This paper performed experiments to optimize pretreatment methods to extract residual CWAs from chloramine-T decon samples before GC analysis. Effects of two neutralization methods, destroying decon activity by 15% Na2SO3 or decreasing decon activity by 3% NH3·H2O or 4% NaOH, were studied. Results showed they were all suitable for the HD decon sample, but only 4% NaOH was ideal for the VX decon sample. As for extractant, compared with dichloromethane, petroleum ether was more suitable for recovering CWAs from decon samples. A high recovery above 80% could be obtained for HD and VX samples ranging from 10 mg/L to 10,000 mg/L when optimized neutralization and extraction methods were simultaneously carried out.

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Authors and Affiliations

  1. Institute of NBC Defence, Beijing, China

    Mengxue Xu, Shaoxiong Wu, Haiyan Zhu, Lianyuan Wang, Hongpeng Zhang, Lan Ma, Ting Miao & Zhenxing Cheng

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  1. Mengxue Xu
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  2. Shaoxiong Wu
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  3. Haiyan Zhu
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  4. Lianyuan Wang
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  5. Hongpeng Zhang
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  6. Lan Ma
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  7. Ting Miao
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  8. Zhenxing Cheng
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Correspondence to Lianyuan Wang.

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Xu, M., Wu, S., Zhu, H. et al. Pretreatment Method for Chloramine-T Decon Sample Before GC Analysis of HD and VX. Bull Environ Contam Toxicol 109, 859–864 (2022). https://doi.org/10.1007/s00128-022-03612-5

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  • DOI: https://doi.org/10.1007/s00128-022-03612-5

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