[Catalytic spectrophotometric determination of trace amounts of copper with the system of ascorbic acid and ammonium molybdate].
Ammonium molybdate was reduced to molybdenum blue by ascorbic acid in the medium of phosphorous acid in the presence of copper catalyst. A new method for catalytic spectrophotometric determination of trace copper has been developed. The linear range was 0-0.024 microgram.25 mL-1. The limit of detection was 1.54 x 10(-11) g.mL-1. The method has been used to determine trace copper in human hair with satisfactory results.
Ding
S
S
Department of Chemistry, Huaibei Coal Teacher's College, Huaibei 235000.
D001205:Ascorbic Acid; D002384:Catalysis; D003300:Copper / Q000032:analysis*; D006197:Hair / Q000737:chemistry*; D006801:Humans; D008982:Molybdenum; D013056:Spectrophotometry, Ultraviolet / Q000379:methods*
D003300:Copper; D008982:Molybdenum; C022175:ammonium molybdate; D001205:Ascorbic Acid