Two sensitive detectors for liquid chromatography, the aerosol detector and the spray impact detector
Two new detectors are introduced for monitoring reverse-phase, high performance liquid chromatography. Their operating principle is based on producing a charged aerosol from the liquid mobile phase by violent rupturing of the liquid surface. The first detector is called the flame aerosol detector. It consists of a turbulent burner that aspirates the mobile phase into a spray; and a screen with a potential that filters any air charge, but allows the evaporating droplets to pass into a partially evacuated chamber. The second detector is called the spray impact detector. A standing baseline current is generated by impact of the mobile phase under gas pressure onto a target electrode, which in turn is connected to an electrometer for voltage or current readout.
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- Instrumentation and Photography