Guan Albert represented Chemservice Company of America, which is certified by the American Laboratory Accreditation Society and is a professional manufacturer of chemical standards. It provides 12,000 kinds of chemical standards such as chromatography and spectroscopy (such as atomic absorption and ICP), including various organic, Inorganic, environmental and pesticide applications. All products comply with the ISO9001 standard and are accompanied by Material Safety Instructions (MSDS). Standard grade (SG) products are guaranteed to have a purity of not less than 98.0%. At least the purity is verified by at least three methods such as chromatography, spectroscopy, and thermal analysis, and a certificate of purity analysis (COA) is issued.
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