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: Alloy -> dental

Citations 1

"Flow Injection Spectrophotometric Determination Of Palladium In Catalysts And Dental Alloys With 2-(5-bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)aniline"
Anal. Chim. Acta 1988 Volume 214, Issue 1-2 Pages 271-277
Tadao Sakai and Norko Ohno

Abstract: Sample solution (100 µL, containing 10 µg L-1 of Pd) was injected into the carrier stream (0.1 M HCl; 0.85 mL min-1) which was then mixed with 0.15 mM 2-(5-bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)aniline in acetate buffer (pH 3.7; 0.85 mL min-1) in a 2-m reaction coil. The absorbance was measured at 612 nm (e = 98,400). The calibration graph was rectilinear for 10 to 100 µg L-1 of Pd and the detection limit was 2 µg l-1. The coefficient of variation (n = 10) for 100 µg L-1 of Pd was 0.6%. The sample throughput was 50 h-1. Interference from Cu could be masked by adding 1 mM EDTA solution to the carrier stream. The method was applied in the determination of Pd in catalysts and dental alloys and results agreed well with those obtained by ICP-AES.
Palladium Spectrophotometry Interferences Method comparison