Vapor Generation Accessory VGA–77 Operation manual

VGA–774. Analytical notes4.1 BackgroundThe VGA-77 employs continuous flow technology where samples andliquid reagents are pumped together and mixed. The gaseous reactionsproducts are swept by a flow of argon gas into the spectrometer.✒ Note Nitrogen gas can be used with the AA reagent module.The following figure shows a schematic diagram of the VGA-77.To spectrometerGas/liquidseparatorReaction coilPeristalticpumpSampleAcidReductantDrainFlow controllerArgon'JHVSFÁ Schematic of the VGAPublication date: May 2004 4-1