Detecting Trace Amounts of Peroxides and Ammonium Nitrate in Fingerprints by Ion Mobility Spectrometry

IF 1 4区化学 Q4 CHEMISTRY, ANALYTICAL Journal of Analytical Chemistry Pub Date : 2024-07-23 DOI:10.1134/s1061934824700357

T. I. Buryakov, I. A. Buryakov

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Abstract

The effect of the sweat and grease deposits (SGD) from fingerprints on the detection efficiency of trace amounts of explosive substances—triacetone triperoxide (TATP), hexamethylene triperoxide diamine (HMTD), and ammonium nitrate (AN) by ion mobility spectrometry in air at atmospheric pressure was investigated. Among the main components of SGD, urea is identified as a positive mode influencer, while lactic acid (LA) affects in a negative mode. The presence of urea or SGD in the sample does not significantly affect the detection of TATP in the positive mode but decreases the efficiency of HMTD ion formation and leads to the appearance of adduct cations of HMTD and urea. The presence of lactic acid or SGD slightly decreases the efficiency of ammonium nitrate ion formation in the negative mode and significantly alters the qualitative composition of HMTD ions, leading to the appearance of HMTD and LA adduct anions. In the absence of any impurities in the sample, the best reduced limit of detection (signal-to-noise ratio = 3σ), estimated at 30–50 pg, was observed for HMTD. The lifetime of HMTD, TATP, and AN traces on aluminum foil under laboratory conditions was determined to be 1, 3, and 12 h for samples with masses of m_HMTD 1 × 10^–9, 2 × 10^–9, and 1 × 10^–8 g and surface densities d_s of 0.008, 0.016, and 0.08 μg/cm², respectively; 10² and 10³ s for m_TATP 1 × 10^–5 and 1 × 10^–4 g and d_s of 80 and 800 μg/cm², respectively; 12 and 25 h for m_AN 3 × 10^–8 and 5 × 10^–8 g and d_s of 0.24 and 0.4 μg/cm², respectively.

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利用离子迁移谱检测指纹中的微量过氧化物和硝酸铵

摘要研究了指纹中的汗液和油脂沉积物（SGD）对常压空气中离子迁移谱法检测痕量爆炸性物质--三丙酮三过氧化物（TATP）、六亚甲基三过氧化二胺（HMTD）和硝酸铵（AN）效率的影响。在 SGD 的主要成分中，尿素被确定为正向影响因子，而乳酸（LA）则为负向影响因子。样品中尿素或 SGD 的存在不会明显影响正向模式下 TATP 的检测，但会降低 HMTD 离子形成的效率，并导致 HMTD 和尿素的加合物阳离子的出现。乳酸或 SGD 的存在会略微降低负模式下硝酸铵离子的形成效率，并明显改变 HMTD 离子的定性组成，导致出现 HMTD 和 LA 的加成阴离子。在样品中没有任何杂质的情况下，HMTD 的最佳降低检测限（信噪比 = 3σ）估计为 30-50 pg。在实验室条件下，对于 mHMTD 质量为 1 × 10-9、2 × 10-9 和 1 × 10-8 g 且表面密度 ds 为 0.008、0.016 和 0.08 μg/cm2 ；mTATP 1 × 10-5 和 1 × 10-4 g，ds 分别为 80 和 800 μg/cm2 时，分别为 102 和 103 秒；mAN 3 × 10-8 和 5 × 10-8 g，ds 分别为 0.24 和 0.4 μg/cm2 时，分别为 12 和 25 小时。

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来源期刊

Journal of Analytical Chemistry 化学-分析化学

CiteScore

2.10

自引率

9.10%

发文量

146

审稿时长

13 months

期刊介绍： The Journal of Analytical Chemistry is an international peer reviewed journal that covers theoretical and applied aspects of analytical chemistry; it informs the reader about new achievements in analytical methods, instruments and reagents. Ample space is devoted to problems arising in the analysis of vital media such as water and air. Consideration is given to the detection and determination of metal ions, anions, and various organic substances. The journal welcomes manuscripts from all countries in the English or Russian language.