✦ LIBER ✦
A step gradient system for microcolumn liquid chromatography based on a multiple-loop valve
✍ Scribed by J. Fred Banks Jr.; Milos V. Novotny
- Publisher
- John Wiley and Sons
- Year
- 1990
- Tongue
- English
- Weight
- 340 KB
- Volume
- 2
- Category
- Article
- ISSN
- 1040-7685
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✦ Synopsis
Abstract
A new gradient elution system for microcolumn liquid chromatography is presented and evaluated. A multiple‐loop valve system facilitates a reproducible, stepwise addition of the mobile phase at low‐microliter‐per‐minute flow rates. The system is amenable to automation. Gradient precision has been evaluated under various operational conditions. An optimized system yielded standard deviations in retention times of less than 0.5 on runs over 2 h.