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
Website: @unf

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Classification: Geological -> mineral -> malachite

Citations 1

"Ultraviolet Spectrophotometric Determination Of Copper In Copper Ores By Flow Injection Analysis"
Talanta 1996 Volume 43, Issue 11 Pages 1909-1914
Amin T. Haj-Husseina,*

Abstract: Sample (100 mg) was heated with 60% HClO4, cooled, mixed with water, boiled, adjusted to pH 5.55 with 1 M NH3 and filtered. A portion (50 µL) of the filtrate was injected into a carrier stream (0.6 ml/min) of water which merged with a stream (0.6 ml/min) of 0.05 M pyrophosphate reagent of pH 9 before passing through a reaction coil (50 cm x 0.51 mm i.d.) to the detector where the absorbance was measured at 240 nm. Sample throughput was 70/h. The calibration graph was linear for 2-50 ppm Cu and the detection limit was 0.3 ppm. The RSD at 10 ppm Cu were 1%. Fe3+, Pb2+ and Ag+ interfered at 1 ppm. Results for native copper sulfide copper (bornite and chalcocite) and oxidized copper (cuprite and malachite) ores are presented. Results agreed with those obtained by AAS.
Copper Sample preparation Spectrophotometry Method comparison Interferences