Adsorption equilibria of isopropyl methylphosphonofluoridate (GB) on activated carbon at ultralow relative pressures

被引：13

作者：

Karwacki, CJ ^{[1
]}

Tevault, DE ^{[1
]}

Mahle, JJ ^{[1
]}

Buchanan, JH ^{[1
]}

Buettner, LC ^{[1
]}

机构：

[1] USA, Edgewood Res Dev & Engn Ctr, SCBRD, RTE, Aberdeen Proving Ground, MD 21010 USA

来源：

LANGMUIR | 1999年 / 15卷 / 19期

关键词：

D O I：

10.1021/la9814788

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Adsorption equilibria are reported for isopropyl methylphosphonofluoridate (GB) on activated carbon at relative pressures (p(i)/p(s)) approaching 10(-10) and temperatures between 30 and 100 degrees C. A novel desorption method and analytical apparatus employing purge-and-trap chromatography (PTC) were used to overcome the difficulties in quantifying the vapor phase at ultralow concentrations ( < 1 ppb). The use of desorption-PTC analysis has extended the detection threshold range by several decades over that of conventional volumetric methods.

引用

页码：6343 / 6345

页数：3

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