Pyrolysis Gas Chromatography and Pyrolysis Gas - swgmat裂解气相色谱、裂解气swgmat.docxVIP

Standard Guide for Using Pyrolysis Gas Chromatography and Pyrolysis Gas Chromatography-Mass Spectrometry in Forensic Paint ExaminationsIntroductionVarious analytical techniques are available for the forensic analysis of paint. The evidentiary samples typically received by forensic laboratories may be relatively small and therefore require techniques that can provide the most information with as little sample consumption as possible. Although destructive in nature, pyrolysis gas-chromatography (Py-GC) and pyrolysis gas-chromatography/mass spectrometry (Py-GC/MS) can provide a large amount of organic chemical information from such samples. This information can be used to augment that obtained from other analytical techniques such as Fourier transform infrared spectroscopy (FTIR) and scanning electron microscopy-energy dispersive x-ray spectroscopy (SEM-EDS).SCOPE1.1 This document serves as a guide to assist individuals and laboratories in the utilization of Py-GC and Py-GC/MS in the forensic examination of paint. It will address the selection, application and evaluation of Py-GC and Py-GC/MS as methods for the identification and comparison of the organic components of paints.1.2 This guideline does not purport to address any safety concerns associated with its use. It is the responsibility of the user of this document to establish appropriate health and safety practices and to determine the applicability of regulatory limitations prior to use.REFERENCED DOCUMENTS 2.1 ASTM International StandardsD16-11 Terminology for Paint Related Coatings, Materials and ApplicationsE 1459-92(2005) Standard Guide for Physical Evidence Labeling and Related DocumentationE 1492-11 Standard Practice for Receiving, Documenting, Storing and Retrieving Evidence in a Forensic Science Laboratory E1610-02(2008) Standard Guide for Forensic Paint Analysis and ComparisonScientific Working Group for Materials AnalysisSWGMAT Trace Evidence Quality Assurance Guidelines (January 2000). Available: