Understanding Gas Chromatography Valves

Valves serve as the heart of the gas chromatography (GC) system. They ensure that precious samples are introduced, routed, and analyzed efficiently in the instrument. The proper selection and maintenance of these devices are critical for optimal GC performance and the accuracy of results.

In this technical brief, you will learn about the types of GC valves, how they impact performance in the GC instrument, and how they fulfill end-user needs. The brief describes how leaks in the valve and its connection points are the largest threat to accurate chromatography performance. Other problems reviewed include operating valves at higher than recommended temperatures, contamination from improper filters, and the use of highly corrosive gases.