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标题: 象棋经典残局打谱练习软件 [打印本页]

作者: 667 时间: 2007-9-1 23:42
标题: 象棋经典残局打谱练习软件

感谢网友提供

作者: 枫云 时间: 2007-9-26 13:24

High Temp. Stability Problem Solved with New Metal Columns

Analysis of Total Glycerides in Biodiesel Oils by ASTM D-6584
Using New MXT?-Biodiesel TG Capillary Columns
Barry L. Burger, Petroleum Chemist, and Jaap de Zeeuw, International GC Consumables Specialist
This content was previously published in Petro Industry News, June, 2007.

One of the biggest challenges in biodiesel fuel analysis is the accurate determination of residual triglyceride content. Triglycerides are present at low levels and elute at high chromatographic temperatures. Any suitable column must be operated at temperatures up to 380°C, which considerably strains conventional capillary tubing and stationary phases. Restek has developed new 0.32mm ID and 0.53mm ID MXT? stainless steel capillary columns—the MXT?-Biodiesel TG line—specifically for high temperature biodiesel analysis. Here we demonstrate the analytical advantages of full metal columns: unsurpassed stability at high temperatures, excellent peak symmetry for triglycerides, highly reproducible retention times, and unsurpassed column lifetimes.

作者: 猫哥 时间: 2008-2-3 01:07
谢谢啦，哈哈

作者: 心武闲仙 时间: 2008-2-3 01:13
haohao

作者: wnn127 时间: 2008-12-19 13:32
gfdgfdgdfg

作者: zhouchang 时间: 2009-1-18 18:33

作者: 012210321 时间: 2009-2-12 13:15

作者: 唐伯猴 时间: 2009-5-21 07:11
地址已经失效了

作者: 0573 时间: 2009-10-15 20:33
谢谢啦，哈哈

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