Page "Atomic absorption spectroscopy" Paragraph 36

Hydride generation techniques are specialized in solutions of specific elements.

The technique provides a means of introducing samples containing arsenic, antimony, tin, selenium, bismuth, and lead into an atomizer in the gas phase.

With these elements, hydride atomization enhances detection limits by a factor of 10 to 100 compared to alternative methods.

Hydride generation occurs by adding an acidified aqueous solution of the sample to a 1 % aqueous solution of sodium borohydride, all of which is contained in a glass vessel.

The volatile hydride generated by the reaction that occurs is swept into the atomization chamber by an inert gas, where it undergoes decomposition.

This process forms an atomized form of the analyte, which can then be measured by absorption or emission spectrometry.