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Abstract
ABSTRACT Highly sensitive spectrophotometric methods for determination of copper and palladium by a new synthesized chromogenic reagent N-dodecyl-N′-(sodium p-amino-benzenesulfonate)-thiourea (DOPT) were developed. In the presence of CTMAB and NaAc-HAc buffer solution, under the optimum conditions for color reaction of copper and palladium with DOPT, their molar absorptivities are ε300.4 nm = 1.56 × 105 l mol−1 cm−1 at 300.4 nm for copper and ε296.0 nm = 7.41 × 104 l mol−1 cm−1 at 296.0 nm for palladium. Microamounts of copper and palladium in samples were satisfactorily determined by the methods.
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