Applications of Direct Injection Soft Chemical Ionisation-Mass Spectrometry for the Detection of Pre-blast Smokeless Powder Organic Additives

Ramón González-Méndez, Chris A Mayhew

    Research output: Contribution to journalArticlepeer-review

    5 Citations (Scopus)
    8 Downloads (Pure)

    Abstract

    Analysis of smokeless powders is of interest from forensics and security perspectives. This article reports the detection of smokeless powder organic additives (in their pre-detonation condition), namely the stabiliser diphenylamine and its derivatives 2-nitrodiphenylamine and 4-nitrodiphenylamine, and the additives (used both as stabilisers and plasticisers) methyl centralite and ethyl centralite, by means of swab sampling followed by thermal desorption and direct injection soft chemical ionisation-mass spectrometry. Investigations on the product ions resulting from the reactions of the reagent ions H 3 O + and O 2 + with additives as a function of reduced electric field are reported. The method was comprehensively evaluated in terms of linearity, sensitivity and precision. For H 3 O + , the limits of detection (LoD) are in the range of 41–88 pg of additive, for which the accuracy varied between 1.5 and 3.2%, precision varied between 3.7 and 7.3% and linearity showed R 2 ≥ 0.9991. For O 2 + , LoD are in the range of 72 to 1.4 ng, with an accuracy of between 2.8 and 4.9% and a precision between 4.5 and 8.6% and R 2 ≥ 0.9914. The validated methodology was applied to the analysis of commercial pre-blast gun powders from different manufacturers. [Figure not available: see fulltext.].

    Original languageEnglish
    Pages (from-to)615-624
    Number of pages10
    JournalJournal of the American Society for Mass Spectrometry
    Volume30
    Issue number4
    Early online date13 Feb 2019
    DOIs
    Publication statusPublished - 19 Apr 2019

    Keywords

    • Proton transfer reaction mass spectrometry
    • PTR-MS
    • SCIMS
    • Smokeless powder additives
    • Smokeless powders
    • Soft chemical ionisation-mass spectrometry

    ASJC Scopus subject areas

    • Structural Biology
    • Spectroscopy

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