在线观看人与动牲交视频_夜夜高潮次次欢爽AV女_奇米在线视频观看_欧美精品七区_色悠久久综合网_少妇潮喷无码白浆水视频

美國Conostan   
美國CONOSTAN公司 (www.conostan.com) 是全球著名的油基標準生產(chǎn)廠家,生產(chǎn)ICP光譜 和ICP質(zhì)譜用的油基金屬標準,有近40種單元素標準,和S-12,S-21和AM特殊多元素標準, 及空白油,是眾多石化和潤滑油用戶的首選分析標樣.公司還可以為用戶特制用戶要求的標樣.
Conostan is the world’s leading manufacturer of metallo-organic elements-in-oil standards. Our industry-leading position is the result of our uniquely superior product chemistry, manufacturing technology, and blending techniques.

Our reputation traces back to over 30 years ago, when the U.S. Department of Defense’s Spectrometric Oil Analysis Program Standards Committee needed standards to analyze metals in lubricating oils and conduct wear-metals-analysis programs. At the time, commercially available metals-in-oil standards were unreliable and made calibrating analytical instrumentation difficult. Conostan’s research and development department discovered and developed the chemistry for producing reliable element-in-oil standards, which were adopted by the Department of Defense.

Conostan is also the only source of multi-element metallo-organic standards in the history of the National Institute of Standards and Technology (NIST) — the reference material NIST-108b is Conostan S-21:300.

Recently acquired by SCP SCIENCE, Conostan is continuing with its more than 30-year tradition of providing world-class products with exceptional customer service. To find out more about SCP SCIENCE, an industry-leading supplier of instruments and supplies for the analytical chemistry market,