妓院一钑片免看黄大片,亚洲av无码成人精品国产,亚洲AV综合色区无码专区桃色,免费A级毛片在线播放不收费

美國Chemservice   
美國Chemservice公司是通過美國實驗室認(rèn)證學(xué)會認(rèn)證的, 生產(chǎn)化學(xué)標(biāo)準(zhǔn)品的專業(yè)產(chǎn)商.
? 提供12,000種色譜, 光譜, 原子吸收和ICP等化學(xué)標(biāo)準(zhǔn)品.
? 包括各類有機, 無機, 環(huán)境和農(nóng)藥等應(yīng)用領(lǐng)域.
? 所有產(chǎn)品全部符合ISO9001標(biāo)準(zhǔn), 附有物料安全說明 (MSDS).
? 標(biāo)準(zhǔn)級 (S.G.) 產(chǎn)品保證純度不低于98.0%, 至少通過色譜, 光譜, 熱分析等三種以上方法驗證純度, 并出具純度分析證明 (COA).
Chem Service, Inc. - We Set The Standard. Want to know more about our company? See a profile of the people who help make Chem Service, Inc. the best in the business.

We are an ISO-9001:2000 Certified Company.

Chem Service, Inc. offers the convenience, cost savings and reliability of 1,000 Certified Standards Grade Organic Chemicals at your fingertips with our Organic Mini Stockroom Kit. This kit was the first product Chem Service, Inc. offered when we started in 1962.

Whether your lab is big or small, disposal fees are a concern. The Organic Mini-stockroom offers you the ability to have 1000 different chemicals at quantities ranging from 100mg to 10gm; thus, reducing disposal costs.

Over 95% of our neat Standards Grade materials have a purity of 98.0% or greater, and have been analyzed by three or more (where feasible) independent methods of analysis. These do not require purity corrections when preparing a solution for use with EPA methods. Our more than 13,000 organic and inorganic standards, and solutions, support EPA Methods, ASTM Methods, State UST Methods, Air monitoring Methods, and International Methods. We offer explosive residue standards, PCB congeners, petroleum hydrocarbon standards for the petrochemical industry, pesticide standards, FAME, and vitamin standards for food analysis.

Suited for identification of unknowns, product screening, optimal chemical selection and small scale chemical reactions, the O-1000A Organic Ministockroom Kit was designed for laboratories with broad chemical classification and indentification needs.

Chem Service, Inc. is registered by ABS Quality Evaluations, Inc., to the internationally recognized requirements of ISO 9001 for design, development, production, distribution and servicing of organic neat and synthetic reference materials.