INSTRUMENTATION AND STRATEGIES FOR HIGH-SPEED GAS-CHROMATOGRAPHY

被引：29

作者：

PETERS, A ^{[1
]}

KLEMP, M ^{[1
]}

PUIG, L ^{[1
]}

RANKIN, C ^{[1
]}

SACKS, R ^{[1
]}

机构：

[1] UNIV MICHIGAN,DEPT CHEM,ANN ARBOR,MI 48109

来源：

ANALYST | 1991年 / 116卷 / 12期

关键词：

HIGH-SPEED GAS CHROMATOGRAPHY; INSTRUMENTATION; VACUUM BACKFLUSH; CRYOFOCUSING; POROUS-LAYER OPEN-TUBULAR COLUMNS;

D O I：

10.1039/an9911601313

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Short lengths of capillary column operated at unusually high carrier-gas velocities are used to separate relatively simple mixtures on a timescale of 20 s or less. Two inlet systems are described which can generate the narrow injection bands needed for these elution times. A cryofocusing inlet using a vacuum-pump-operated gas flow direction control is used for compounds generally less volatile than n-pentane. A low-friction gas valve inlet combined with porous-layer open-tubular columns is used for volatile compounds of low molecular mass. Strategies for high-speed separations including high-speed backflush, backflush with recycle, vacuum-outlet operation and selective detection are described. These techniques are used to increase the operational flexibility and the amount of information that can be obtained using high-speed gas chromatography.

引用

页码：1313 / 1320

页数：8

共 34 条

[1] THE USE OF COANDA WALL ATTACHMENT FLUIDIC SWITCHES AS GAS-CHROMATOGRAPHIC VALVES [J].