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A.S.O. Design

Supplier of Canadian certified reference materials (standards) for calibration of analytical instruments, and ISO-9000.

http://www.asocanada.com/

Brammer Standard Company, Inc.

Offers analytical reference materials for spectroscopy from around the world based in Houston, TX.

http://www.brammerstandard.com/

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.

http://www.cpachem.com/

Resource Technology Corp.

RTC offers proficiency testing schedules, and manufacturers natural-matrix samples and certified reference materials in Laramie, WY.

http://www.rt-corp.com/

Thorn Smith Laboratories

Quantitative and qualitative unknowns, student reference standards, answer sheets, from Beulah, MI.

http://www.thornsmithlabs.com/

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