GSR Quality Scheme - quo data Gesellschaft für Qualitätsmanagement und Statistik mbH

GSR Quality Scheme

GSR Proficiency Tests

From the April 2016 Final Meeting of the international PT on Forensic Determination of Shooting Distance organized by QuoData and held at the QuoData head office in Dresden. 


Since 2010, the quo data Gesellschaft für Qualitätsmanagement und Statistik mbH has independently organized and evaluated the annual proficiency testing of the GSR proficiency testing program (GSR quality scheme) on behalf of the European Network of Forensic Science Institutes  (ENFSI). Thereby, quo data Gesellschaft für Qualitätsmanagement und Statistik mbH is actively supported by members of the ENFSI working group "Firearms/GSR" as an advisory board. 

The GSR proficiency testing scheme, which is unique in its form worldwide, is accredited according to ISO/IEC 17043:2010 since January 2022.

Specially prepared samples for the detection and classification of typical GSR particles (containing lead, barium and antimony) are provided, and participants use their own laboratory-specific procedure for the automated detection of GSR particles via SEM/EDS according to ASTM E1588.

Based on the composition, location and size of the particles submitted by the participants, the correct detection and classification are evaluated and assessed by quo data Gesellschaft für Qualitätsmanagement und Statistik mbH.


For accredited laboratories - having to take part in an annual trace evidence proficiency test - this GSR quality scheme is especially important. At the moment, no equivalent GSR quality schemes are available for international proficiency testing. Results from former proficiency tests can be viewed in the archives.

GSR PT 2022 - Current information

We are delighted that you are interested in participating in the 2022 GSR PT round.


We successfully completed the accreditation of the GSR PT according to ISO/IEC 17043:2010 (“General requirements for proficiency testing”). Hence, we fulfil the requirements by ASTM E3255-21 Standard Practice.

The official accreditation certificate is expected to be issued by the German accreditation body in the coming weeks. 


The enrollment for the 2022 GSR PT is possible until 30 April 2022.


Sample shipment is currently planned for 8 June 2021. We will keep you updated on any changes if necessary.


If you participated in a GSR PT round not before 2019, you can login and enroll here: If you have forgotten your password, you can request a new password to be sent to your registered email address at any time.

Otherwise, please fill in the online application form provided here: You will get an email with your login data and the link for enrollment. After successful enrollment, you will receive a confirmation email. Further information regarding online data entry will be sent together with the sample(s).


Samples for the 2022 GSR PT round will be sent via FedEx Corporation, as in previous years.


Reports will be sent out on 30 September 2022.


Detailed information regarding the GSR2022 PT round is available in the “Call for Participation” document.

If you have any questions regarding the GSR PT scheme, please do not hesitate to contact us under



For all those interested in GSR we offer this link to participate for free in our webinars "Utilize your PT results" and "Determine measurement uncertainties":

Introductory information, available in different languages: 

Online GSR QC Analysis Tool

This web tool enables the automatic evaluation of uploaded quality control measurements of GSR PT samples from the years 2010 to 2021 and the “standard GSR sample” offered by PLANO GmbH .

Once you have imported your data a comprehensive PDF report is created as well as a dynamic chart which provides various selection criteria for a specific evaluation.



                                                   Open GSR QC Analysis Tool