دورية أكاديمية
Colour quantitation for chemical spot tests for a controlled substances presumptive test database.
| العنوان: | Colour quantitation for chemical spot tests for a controlled substances presumptive test database. |
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| المؤلفون: | Elkins KM; Chemistry Department, Towson University, 8000 York Road, Towson, MD, 21252, USA., Weghorst AC; Chemistry Department, Towson University, 8000 York Road, Towson, MD, 21252, USA., Quinn AA; Chemistry Department, Towson University, 8000 York Road, Towson, MD, 21252, USA., Acharya S; Computer and Information Sciences Department, Towson University, 8000 York Road, Towson, MD, 21252, USA. |
| المصدر: | Drug testing and analysis [Drug Test Anal] 2017 Feb; Vol. 9 (2), pp. 306-310. Date of Electronic Publication: 2016 Feb 09. |
| نوع المنشور: | Journal Article |
| اللغة: | English |
| بيانات الدورية: | Publisher: John Wiley & Sons Country of Publication: England NLM ID: 101483449 Publication Model: Print-Electronic Cited Medium: Internet ISSN: 1942-7611 (Electronic) Linking ISSN: 19427603 NLM ISO Abbreviation: Drug Test Anal Subsets: MEDLINE |
| أسماء مطبوعة: | Original Publication: Chichester, UK : John Wiley & Sons |
| مواضيع طبية MeSH: | Colorimetry/*methods , Controlled Substances/*analysis, Color ; Databases, Pharmaceutical ; Humans ; Mobile Applications ; Substance Abuse Detection/methods |
| مستخلص: | Crime scene investigators (CSIs) often encounter unknown powders, capsules, tablets, and liquids at crime scenes, many of which are controlled substances. Because most drugs are white powders, however, visual determination of the chemical identity is difficult. Colourimetric tests are a well-established method of presumptive drug identification. Positive tests are often reported differently, however, because two analysts may perceive colour or record colourimetric results in different ways. In addition to perceiving colour differently, it is very common for there to be poor visibility conditions (e.g. rain, darkness) while performing these tests, further obscuring the results. In order to address these concerns and to create uniformity in the reporting of on-site colourimetric test results, this study has evaluated two of the state-of-the-art apps (ColorAssist® and Colorimeter®) for reporting the colour test results quantitatively in red-green-blue (RGB) format. The compiled library database of presumptive test results contains over 3300 data points including over 800 unique drug/test combinations. Variations observed between test replicates, from performing a test on different days, recording with a different device type (e.g. iPod Touch, iPhone models 4, 5c, 5s, or 6), and using different quantities of drug are discussed. Overall, the least variation in Euclidian norm was observed using ColorAssist® with the camera light (25.1±22.1) while the variation between replicates and data recorded using different devices was similar. The resulting library is uploaded to a smartphone application aimed to aid in identifying and interpreting suspected controlled substance evidence. Copyright © 2016 John Wiley & Sons, Ltd. (Copyright © 2016 John Wiley & Sons, Ltd.) |
| فهرسة مساهمة: | Keywords: ColorAssist®; colour spot test; crime scene investigation; drug identification; forensic science; presumptive drug test |
| المشرفين على المادة: | 0 (Controlled Substances) |
| تواريخ الأحداث: | Date Created: 20160210 Date Completed: 20170630 Latest Revision: 20170630 |
| رمز التحديث: | 20240628 |
| DOI: | 10.1002/dta.1949 |
| PMID: | 26858007 |
| قاعدة البيانات: | MEDLINE |
Full Text Finder | تدمد: | 1942-7611 |
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| DOI: | 10.1002/dta.1949 |