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 1. Continuous-flow cold-vapor atomic absorption spectrometry (CVAAS) manifold for determining mercury. A, Autosampler, 8 mL/min; B, 8-channel peristaltic pump; C, 1 percent nitric acid wash, 7 mL/min; D, air, 48 mL/min; e, complexing-reducing solutin, 3.5 mL/min; f, 20-turn mixing coil; G, stannous chloride solution, 3.5 mL/min; H, 80-turn mixing coil; I, liquid-gas separator; J, liquid to waste; K, flow-through cell in atomic absorption spectrophotometer; L, strip chart recorder.

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