University of North Florida
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Stuart Chalk, Ph.D.
Department of Chemistry
University of North Florida
Phone: 1-904-620-1938
Fax: 1-904-620-3535
Email: schalk@unf.edu
Website: @unf

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Curative

Classification: Environmental -> water -> curative

Citations 1

"Arsenic, Selenium And Mercury In Mineral And Curative Waters"
Brauwelt 1990 Volume 130, Issue 37 Pages 1588-1591
Meier, B.;Dietschmann, U.;Gigl, C.;Seberich, M.;Postel, W.

Abstract: The three elements were determined by AAS following hydride reduction in a flow injection system. For the determination of As, sample was mixed with HCl and KI solution (5% KI and 5% ascorbic acid), injected into a carrier of 2% HCl and reduced with NaBH4 in NaOH. The same carrier and reagent were used for the determination of Se, reduced by heating (90°C, 20 min) the sample with HCl (12 min) and diluting with water. Organic forms of Hg were converted to ionic forms by shaking the sample with HNO3, KMnO4 and water. The sample was injected into a carrier of KNO3 and reduced with NaBH4 in NaOH. The metallic Hg formed was amalgamated with Au or Pt gauze and was released into a stream of Ar by heating (600°C) for AAS analysis. The detection limits were 0.3, 0.6 and 0.1 µg L-1 for As, Se and Hg, respectively. The coefficient of variation (n = 20) were 2.9% (As and Se) and 5.2% (Hg). Results are discussed for the analysis of 44 mineral waters and six curative waters.
Selenium Mercury Arsenic Spectrophotometry Spectrophotometry Dilution Volatile generation Amalgamation Volatile generation