AXIO | Proficiency Testing schemes 2026
Forensic Isotope Ratio Mass Spectrometry FIRMS
“Supported by the FIRMS Network” Isotope Ratio Mass Spectrometry (FIRMS) is a specialised technique that precisely measures small differences in the abundances of isotopes such as 2H/1H, 13C/12C, 15N/14N and 18O/16O. Subtle variations to the ‘natural’ abundance of these isotopes may be introduced during biological, chemical, and physical processes. These changes enable the identification of materials that otherwise may not be differentiated, such that IRMS is used in many fields, including archaeology, medicine, geology, food authenticity, and forensics. At AXIO Proficiency Testing, we recognise the importance of getting it right. Participation in our AXIO FIRMS scheme helps laboratories demonstrate competence in this analytical technique. The scheme is operated by AXIO Proficiency Testing and is supported by the FIRMS Network, which provides input on the choice of test materials and scheme performance.
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The full range and availability of test materials and analytes is determined on an annual basis and may be added or removed. For accredited and non-accredited status please see current application form/scheme description.
122 lgcstandards.com/AXIO
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