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. - 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. LGC Reference Materials - LGC produces and supplies high quality certified reference materials and biomaterials throughout Europe intended for calibrating analytical instruments. AmXpress Ltd - Provides certified analytical standards and chromatography products for chemical analysis and life sciences. Exaxol - Certified reference materials for calibration and analysis. Also custom multi element solutions.