The Chemical Analysis of Argonne Premium Coal Samples

Edited by Curtis A. Palmer

1997
U.S. Geological Survey Bulletin 2144

Determination of Mercury and Selenium in Eight Argonne Premium Coal Samples by Cold-Vapor and Hydride-Generation Atomic Absorption Spectrometry

By Richard M. O'Leary

Figure 2. Continuous-flow hydride-generation atomic absorption spectrometry (HGAAS) manifold for determining selenium. A, Autosampler, 8 mL/min; B, 4-channel perstaltic pump; C, deionized water wash, 8 mL/min; D, concentrated hydrochloric acid, 1 mL/min; E, sodium borohydride solution, 1 mL/min; F, nitrogen purge gas, 90 mL/min; G, liquid-gas phase separator; H, liquid to waste; I, heated quartz furnace in atomic abosrption spectrophotometer; J, strip chart recorder.

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