Variable Volume Automatic Sample Dispenser for an Electrothermal Atomizer

Abstract
A computer-controlled discontinuous automatic sample dispenser (ASD) for use with a graphite braid atomizer is described. In the single sample mode it can deliver sample volumes of 1.00 to 5.00 μl in 0.05 μl increments with typical atomic absorption measurement precision ranging from 2 to 5%. In the multiple sample mode, any of six samples may be delivered with typical total measurement precisions of about 10 to 15%.