Читать книгу Process Gas Chromatographs - Tony Waters - Страница 44

The household examples used above may provide some valuable help with troubleshooting and are worth remembering:

 When a column works at higher temperature, gas solubility is reduced, and all the peaks come out earlier on the chromatogram, thereby reducing their separation. For an easy way to remember this, recall the heated water!

 When a column works at higher pressure, gas solubility is increased and all the peaks come out later on the chromatogram, thereby increasing their separation. For an easy way to remember this, recall the bubbly champagne!

These troubleshooting tips assume that the carrier gas flow rate is held constant. Later chapters discuss the effect of other variables.

The rest of this chapter explains how solubility causes the classic peak shape. The following chapter examines how a difference in solubility will cause the peaks to become separated from each other.