---
title: The Particle Articles | GSR analysis
description: GSR analysis | Gateway Analytical's blog gives you explores the world of pharmaceutical investigations, materials analysis, metal cleanliness testing, and general science fun!
---

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# The Particle Articles

[![](https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/CaraP1-239x300.jpg)](https://info.gatewayanalytical.com/particle-articles/blog/cara-plese-m-s-senior-scientist)

## [Cara Plese, M.S., Senior Scientist](https://info.gatewayanalytical.com/particle-articles/blog/cara-plese-m-s-senior-scientist)

 \[fa icon="calendar'\] Jan 29, 2013 2:43:55 PM / by [Cara Plese](https://info.gatewayanalytical.com/particle-articles/author/cara-plese) posted in [analytical testing](https://info.gatewayanalytical.com/particle-articles/topic/analytical-testing), [Authors](https://info.gatewayanalytical.com/particle-articles/topic/authors), [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [Confocal Raman](https://info.gatewayanalytical.com/particle-articles/topic/confocal-raman), [confocal Raman spectroscopy](https://info.gatewayanalytical.com/particle-articles/topic/confocal-raman-spectroscopy), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [FTIR](https://info.gatewayanalytical.com/particle-articles/topic/ftir), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [materials science](https://info.gatewayanalytical.com/particle-articles/topic/materials-science-2), [Optical Microscopy](https://info.gatewayanalytical.com/particle-articles/topic/optical-microscopy), [pharmaceutical](https://info.gatewayanalytical.com/particle-articles/topic/pharmaceutical-2), [Polarized light microscopy](https://info.gatewayanalytical.com/particle-articles/topic/polarized-light-microscopy), [quality control](https://info.gatewayanalytical.com/particle-articles/topic/quality-control), [sem-eds](https://info.gatewayanalytical.com/particle-articles/topic/sem-eds)

[\[fa icon="comment"\] 0 Comments](https://info.gatewayanalytical.com/particle-articles/blog/cara-plese-m-s-senior-scientist#comments-listing)

 Cara Plese, M.S., Senior Scientist 

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## [Webinar Recap and Q&A for What Police & Attorneys Need to Know about Gunshot Residue Analysis](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-and-qa-for-what-police-attorneys-need-to-know-about-gunshot-residue-analysis)

 \[fa icon="calendar'\] Jan 28, 2013 10:03:04 AM / by [Admin](https://info.gatewayanalytical.com/particle-articles/author/admin) posted in [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [crime scene investigation](https://info.gatewayanalytical.com/particle-articles/topic/crime-scene-investigation), [forensic expert](https://info.gatewayanalytical.com/particle-articles/topic/forensic-expert), [Forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [trace evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence)

[\[fa icon="comment"\] 0 Comments](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-and-qa-for-what-police-attorneys-need-to-know-about-gunshot-residue-analysis#comments-listing)

On January 22nd, Dave Exline, Senior V.P. and Rebekah Wagurak, Forensic Scientist at Gateway Analytical, hosted a webinar designed for police and attorneys and built upon the information provided in our previous webinar, “[Forensic Analysis of Gunshot Residue for Police & Attorneys](http://www.gatewayanalytical.com/webinar-replays/forensics-webinars/upcoming-webinar-forensic-gunshot-residue-analysis-for-police-attorneys/).”  During this webinar, our presenters provided police officers with tips on the proper collection of gunshot residue (GSR) evidence, as well as, the methodology used to analyze and interpret the data utilizing automated scanning electron microscopes (SEM).  Our presenters also took attendees into the courtroom, providing attorneys with insight into the significance of GSR evidence during a case, and what implications can be made from this type of evidence during expert testimony.

[Read More \[fa icon="long-arrow-right"\]](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-and-qa-for-what-police-attorneys-need-to-know-about-gunshot-residue-analysis)

[![](https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/International-Logo-Web1.jpg)](https://info.gatewayanalytical.com/particle-articles/blog/prestigious-ascldlab-international-accreditation-for-forensic-trace-evidence-testing)

## [Gateway Analytical Achieves the Prestigious ASCLD/LAB-International Accreditation for Forensic Trace Evidence Testing!](https://info.gatewayanalytical.com/particle-articles/blog/prestigious-ascldlab-international-accreditation-for-forensic-trace-evidence-testing)

 \[fa icon="calendar'\] Nov 27, 2012 2:12:37 PM / by [Tricia Wood](https://info.gatewayanalytical.com/particle-articles/author/tricia-wood) posted in [ASCLD/LAB accreditation](https://info.gatewayanalytical.com/particle-articles/topic/ascldlab-accreditation), [ASCLD/LAB-International accreditation](https://info.gatewayanalytical.com/particle-articles/topic/ascldlab-international-accreditation), [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [forensic expert](https://info.gatewayanalytical.com/particle-articles/topic/forensic-expert), [Forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [ISO 17025](https://info.gatewayanalytical.com/particle-articles/topic/iso-17025), [quality assurance](https://info.gatewayanalytical.com/particle-articles/topic/quality-assurance-2), [quality control](https://info.gatewayanalytical.com/particle-articles/topic/quality-control), [trace evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence), [Trace Evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence-forensics)

[\[fa icon="comment"\] 0 Comments](https://info.gatewayanalytical.com/particle-articles/blog/prestigious-ascldlab-international-accreditation-for-forensic-trace-evidence-testing#comments-listing)

We are now one (1) of only two (2) private labs in the country that is accredited to this standard for trace evidence, and **we are the only private lab in the country to be accredited for gunshot residue analysis.**

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[![](https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/GSR_Particle1.jpg)](https://info.gatewayanalytical.com/particle-articles/blog/acquisition-of-third-sem-eds-system-will-be-used-exclusively-for-the-analysis-of-forensic-gunshot-residue-evidence)

## [Acquisition of Third SEM-EDS System will be Used Exclusively for the Analysis of Forensic Gunshot Residue Evidence](https://info.gatewayanalytical.com/particle-articles/blog/acquisition-of-third-sem-eds-system-will-be-used-exclusively-for-the-analysis-of-forensic-gunshot-residue-evidence)

 \[fa icon="calendar'\] Jul 13, 2012 10:40:21 AM / by [Rebekah Byrne](https://info.gatewayanalytical.com/particle-articles/author/rebekah-wagurak) posted in [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [crime scene investigation](https://info.gatewayanalytical.com/particle-articles/topic/crime-scene-investigation), [energy dispersive spectroscopy](https://info.gatewayanalytical.com/particle-articles/topic/energy-dispersive-spectroscopy), [forensic expert](https://info.gatewayanalytical.com/particle-articles/topic/forensic-expert), [Forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [Gunshot Residue Evidence](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-evidence), [scanning electron microscope](https://info.gatewayanalytical.com/particle-articles/topic/scanning-electron-microscope), [trace evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence), [Trace Evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence-forensics), [sem-eds](https://info.gatewayanalytical.com/particle-articles/topic/sem-eds)

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<https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/GSR_Particle1.jpg> SEM image of a GSR particle coupled with the EDS spectrum of its elemental composition 

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[![](https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/ASCLAD-LAB-LOGO1.jpg)](https://info.gatewayanalytical.com/particle-articles/blog/gateway-analytical-on-track-to-meet-2012-ascldlab-quality-goal-for-trace-evidence-analysis)

## [Gateway Analytical on Track to Meet 2012 ASCLD/LAB Quality Goal for Trace Evidence Analysis](https://info.gatewayanalytical.com/particle-articles/blog/gateway-analytical-on-track-to-meet-2012-ascldlab-quality-goal-for-trace-evidence-analysis)

 \[fa icon="calendar'\] Apr 5, 2012 11:52:25 AM / by [Tricia Wood](https://info.gatewayanalytical.com/particle-articles/author/tricia-wood) posted in [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [forensic fiber analysis](https://info.gatewayanalytical.com/particle-articles/topic/forensic-fiber-analysis), [forensic hair analysis](https://info.gatewayanalytical.com/particle-articles/topic/forensic-hair-analysis), [Forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [quality assurance](https://info.gatewayanalytical.com/particle-articles/topic/quality-assurance-2), [quality control](https://info.gatewayanalytical.com/particle-articles/topic/quality-control), [quality management system](https://info.gatewayanalytical.com/particle-articles/topic/quality-management-system), [quality system](https://info.gatewayanalytical.com/particle-articles/topic/quality-system), [trace evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence), [Trace Evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence-forensics)

[\[fa icon="comment"\] 0 Comments](https://info.gatewayanalytical.com/particle-articles/blog/gateway-analytical-on-track-to-meet-2012-ascldlab-quality-goal-for-trace-evidence-analysis#comments-listing)

I'm excited to say that Gateway Analytical is one step closer to achieving its 2012 goal of [ASLCD/LAB](http://www.ascld-lab.org/) accreditation for our forensic [trace evidence analysis services](http://www.gatewayanalytical.com/industries-served/forensic/forensic-testing/trace-evidence-experts-for-the-forensic-industry/). We've submitted the required application materials including the Quality Management System Manual, [Statement of Qualifications](http://www.wisegeek.com/what-is-an-statement-of-qualifications-soq.htm) (SOQs), and [Standard Operating Procedures](http://en.wikipedia.org/wiki/Standard_operating_procedure) (SOPs), among others, which have been accepted by the assigned assessor and we are now undergoing a document [gap analysis](http://www.businessdictionary.com/definition/gap-analysis.html).   We expect our certification audit to be in May or June and look forward to meeting our goal of ASCLD/LAB accreditation in late Q3 or early Q4!

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[![](https://info.gatewayanalytical.com/hubfs/Imported_Blog_Media/gunshot-res1-150x150.jpg)](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-forensic-gunshot-residue-gsr-analysis-for-police-attorneys)

## [Webinar Recap: Forensic Gunshot Residue (GSR) Analysis for Police & Attorneys](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-forensic-gunshot-residue-gsr-analysis-for-police-attorneys)

 \[fa icon="calendar'\] Mar 2, 2012 11:00:39 AM / by [David Exline](https://info.gatewayanalytical.com/particle-articles/author/david-exline) posted in [Blog](https://info.gatewayanalytical.com/particle-articles/topic/blog), [crime scene investigation](https://info.gatewayanalytical.com/particle-articles/topic/crime-scene-investigation), [forensic expert](https://info.gatewayanalytical.com/particle-articles/topic/forensic-expert), [Forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics), [forensics](https://info.gatewayanalytical.com/particle-articles/topic/forensics-2), [GSR analysis](https://info.gatewayanalytical.com/particle-articles/topic/gsr-analysis), [gunshot residue analysis](https://info.gatewayanalytical.com/particle-articles/topic/gunshot-residue-analysis), [trace evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence), [Trace Evidence](https://info.gatewayanalytical.com/particle-articles/topic/trace-evidence-forensics)

[\[fa icon="comment"\] 0 Comments](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-forensic-gunshot-residue-gsr-analysis-for-police-attorneys#comments-listing)

On Feb 7th, 2012 Gateway Analytical hosted a live webinar titled “Forensic Gunshot Residue Analysis for Police & Attorneys”. During the webinar our presenters, David Exline and Cara Plese, discussed what gunshot residue (GSR) is, how to collect it and control contamination, the historical and current methods of analytical testing of GSR, as well as a discussion on how terminology in the GSR community has changed and why.

[Read More \[fa icon="long-arrow-right"\]](https://info.gatewayanalytical.com/particle-articles/blog/webinar-recap-forensic-gunshot-residue-gsr-analysis-for-police-attorneys)

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##### Gateway Analytical provides analytical testing and consulting services that can help ensure product quality. Specializing in advanced characterization and pharmaceutical investigations, we provide unique services, such as particulate characterization analysis, source determination, glass delamination studies, particle distribution studies and polymorph and agglomerate studies. With more than 20 years of experience, you can rely on our expertise in analytical testing and consulting to help you solve your toughest challenges. Our scientists have the diverse industry expertise and the technical know-how to meet your unique needs quickly and efficiently.  [Learn More \[fa icon="long-arrow-right"\]](http://www.gatewayanalytical.com/resources/)

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