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Resource Technology Corp. - RTC offers proficiency testing schedules, and manufacturers natural-matrix samples and certified reference materials in Laramie, WY.
LGC Reference Materials - LGC produces and supplies high quality certified reference materials and biomaterials throughout Europe on behalf of ATCC, USP, EP, NIST and BCR.
Referenz Certified Reference Materials - Offer steel, iron and spectrochemical RM, PDF downloads include catalog from BAS CRM distributor for New Zealand and Australia.
Thorn Smith Laboratories - Quantitative and qualitative unknowns, student reference standards, answer sheets, from Beulah, MI.
C.P.A. Chemical products for analysis - Offers standards and custom made, ready-to-use multi and mono-element solutions for AAS, ISP, MS and ILC, from Stara Zagora, Bulgaria.
Brammer Standard Company, Inc. - Offers analytical reference materials for spectroscopy from around the world based in Houston, TX.
NIST Standard Reference Materials - SRM lists over 1300 individual reference materials produced by NIST, with carefully assigned values for chemical composition and physical properties. MSDS, prices in US$ and sale to registered users, dispatched from Gaithersburg, MD.
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