The removal of arsenic from process solutions and effluents has been practiced by the mineral process industries for many years. More recently, because of the recognition that arsenic at low concentrations in drinking water causes severe health effects, the technologies that have been used in the mineral industry are being applied to that situation. Removal of arsenic in process solutions can b...

7.03.3 SOURCES AND DIAGENESIS OF SHOAL-WATER CARBONATE-RICH SEDIMENTS 75 7.03.3.1 Sources of Shoal-water Carbonates 75 7.03.3.1.1 General considerations 75 7.03.3.1.2 Sources of carbonate muds 76 7.03.3.1.3 Formation of carbonate sands 76 7.03.3.2 Early Marine Diagenesis of Shoal-water Carbonate-rich Sediments 77 7.03.3.2.1 Pore-water chemistry 77 7.03.3.2.2 Precipitation of early carbonate cem...

Bioanalysis is sub-discipline of analytical chemistry covering the quantitative measurement of drugs and their metabolites in biological systems. Whereas Liquid chromatography mass spectrometry is a technique which is widely used for the quantification of drug from biological fluid. This article reviews the most recent advances in sample preparation, separation analysis and different type of ca...

334 CLINICAL CHEMISTRY, Vol. 25, No. 2, 1979 is used at pH 7.4 and the fact that this interference depends on the type of tracer and pH at which the assay is performed are significant. Also the observation that the introduction of an ethanol precipitation step into the assay eliminates the effect of variation in the matrixes of commercial standards provides for a significant improvement in the ...

568 CLINICAL CHEMISTRY, Vol. 29, No. 3, 1983 high-density lipoprotein for cholesterol determination: Ultracentrifugation vs precipitation with sodium phosphotungstate and magnesium chloride. Clin Chem 27, 838841 (1981). 7. Kohlmeier M, Schlierf G. Effect of storage on HDL-cholesterol measurements. Clin Chem 28, 396-397 (1982). Letter. 8. Demacker PNM, Hijmans AG, van Sommeren-Zondag DF, et al. ...

Sources and distribution of trace species in Alpine precipitation inferred from two 60-year ice core paleorecords A. Eichler , M. Schwikowski, M. Furger, U. Schotterer, and H. W. Gäggeler 2 Paul Scherrer Institute, CH-5232 Villigen PSI, Switzerland Department of Chemistry and Biochemistry, University of Bern, Freiestrasse 3, CH-3012 Bern, Switzerland Received: 27 November 2003 – Accepted: 18 De...

Clouds can significantly impact trace chemical distributions in the troposphere and the chemical composition of precipitation. Clouds affect chemical distributions through convection of air and hydrometeors containing trace chemicals. They also provide a multiphase environment for chemical phase changes and reaction. Due to the large vertical motions and turbulence of strong convective cloud sy...

This discussion paper is/has been under review for the journal Atmospheric Chemistry and Physics (ACP). Please refer to the corresponding final paper in ACP if available. Abstract Seven-year measurements of precipitation, lightning flashes, and visibility from 2000 to 2006 have been analyzed in the Pearl River Delta (PRD) region, China, with a focus on the Guangzhou megacity area. Statistical a...