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Related Experiment Videos

Examination of paints by trace element analysis

S S Krishnan

    Journal of Forensic Sciences
    |October 1, 1976
    PubMed
    Summary

    Neutron activation analysis (NAA) effectively distinguishes paint samples by analyzing trace elements. This method is valuable for both household and small automobile paint samples, offering rapid and efficient analysis.

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    Area of Science:

    • Forensic Science
    • Analytical Chemistry
    • Materials Science

    Background:

    • Physical appearance and resin composition are often insufficient for differentiating paint samples.
    • Trace element analysis offers a more discriminatory approach.

    Purpose of the Study:

    • To evaluate the effectiveness of neutron activation analysis (NAA) for trace element analysis in paint samples.
    • To establish NAA as a valuable technique for distinguishing between similar paint formulations.

    Main Methods:

    • Neutron activation analysis (NAA) was employed for trace element quantification.
    • Sample preparation, irradiation, and counting procedures were optimized for efficiency.

    Main Results:

    • Trace element composition effectively differentiates white household paint samples.
    • NAA provides crucial discrimination for automobile paint samples, especially when sample size is minimal.
    • The developed NAA technique is rapid, requiring minimal hands-on time per sample.

    Conclusions:

    • Neutron activation analysis is a powerful and efficient tool for forensic paint analysis.
    • NAA offers a reliable method for discriminating between paint samples that are otherwise difficult to distinguish.
    • The technique's speed and minimal sample requirement make it suitable for high-throughput forensic laboratories.

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