✦ LIBER ✦

Rapid determination of mercury in environmental materials using on-line microwave digestion and atomic fluorescence spectrometry

✍ Scribed by A. Morales-Rubio; Ml. Mena; C.W. McLeod

Publisher: Elsevier Science
Year: 1995
Tongue: English
Weight: 523 KB
Volume: 308
Category: Article
ISSN: 0003-2670
DOI: 10.1016/0003-2670(94)00666-a

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✦ Synopsis

A procedure for on-line microwave digestion and determination of mercury in environmental materials by atomic fluorescence spectrometry has been developed. The method is based on the direct injection of slurried samples (acidified) into a carrier stream of hydrochloric acid. Microwave digestion in a Teflon coil (4 m) permits, in only 50 s, the quantitative extraction of Hg from the solid samples. In combination with atomic fluorescence detection the on-line digestion/procedure permits the determination of mercury with a throughput of 15 samples per hour. Based on a sample injection volume of 400 ~1, precision was OS-1.5% R.S.D. and the limit of detection was 0.09 ng g -'. Application to a range of certified environmental reference materials was demonstrated.

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