Background - Agilent Technologies VGA 77 User Manual

Analytical Notes

Background

The VGA 77 employs continuous flow technology where samples and
liquid reagents are pumped together and mixed. The gaseous
reactions products are swept by a flow of argon gas into the
spectrometer.
Nitrogen gas can be used with the AA reagent module.
NOTE
The following figure shows a schematic diagram of the VGA 77.
Gas/liquid
separator
Drain
Figure 19. Schematic of the VGA 77
The peristaltic pump maintains a constant flow of analytical
solutions into the accessory.
56
To spectrometer
Reaction coil
Agilent Vapor Generation Accessory VGA 77 and VGA 77P User's Guide
Peristaltic
pump
Flow controller
Sample
Acid
Reductant
Argon