کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
6462424 1421978 2017 12 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Characterization of smokeless powders using multiplexed collision-induced dissociation mass spectrometry and chemometric procedures
ترجمه فارسی عنوان
خصوصیات پودرهای دودی بدون استفاده از طیف سنجی جرمی جدا شده ناشی از برخورد با برخورد و روش های شیمیایی
کلمات کلیدی
پودرهای بدون سس، طیف سنج جرمی غیر هدفمند، اختلاط القایی ناشی از برخورد چندگانه، تجزیه و تحلیل اجزای اصلی، تجزیه خوشه سلسله مراتبی،
موضوعات مرتبط
مهندسی و علوم پایه شیمی شیمی آنالیزی یا شیمی تجزیه
چکیده انگلیسی


- Chemical characterization of unburned smokeless powders and fired residues by LC-APCI-TOFMS.
- Multiplexed collision-induced dissociation for non-targeted compound identification.
- PCA and HCA to associate and discriminate powders using organic compound profiles.
- Powder composition independent of brand, caliber, and primer composition.
- Association of fired residue to unburned powders dependent on initial powder composition.

This work demonstrates a non-targeted mass spectrometry approach for identification of organic compounds in smokeless powders. Unburned powders were removed from various commercial ammunitions of different brand, primer composition, caliber, and age. The unburned powders and corresponding fired residues were analyzed by liquid chromatography-atmospheric pressure chemical ionization-time-of-flight mass spectrometry (LC-APCI-TOFMS). Multiplexed collision-induced dissociation was performed at increasing collision potentials resulting in successive fragmentation that provided structural information for compound identification in a non-targeted manner. Nine compounds were identified in the powders, including akardite II, ethyl centralite, diphenylamine, N-nitrosodiphenylamine, and dibutyl phthalate.Multivariate statistical procedures were performed to first investigate association and discrimination of the unburned powders. Principal components analysis (PCA) of the chemical profiles suggested nine distinct groups of powders, according to the dominant organic compounds present. The clusters formed in hierarchical cluster analysis (HCA) were mostly in agreement with PCA groupings although HCA provided a metric to quantify the similarity. Finally, association of the fired residue to the corresponding unburned powder was possible although the success was highly dependent on the composition of the unburned powder and the extent of compound depletion as a result of firing.

ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Forensic Science International - Volume 272, March 2017, Pages 16-27
نویسندگان
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