Add time:08/01/2019         Source:sciencedirect.com

A rapid spectrophotometric method for the determination of Pd in titanium alloys is proposed. It is based on the reaction of 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol with Pd(II) in a sulphuric acid medium in the presence of ethanol. Beer's law is obeyed up to 40 μg of Pd. The molar absorptivity is 4.5 × 104 1.mole−1.cm−1. The standard deviation is 0.3 μg of Pd and the coefficient of variation varies from 0.8 to 3.3%. The elements ordinarily present in such alloys do not interfere. High selectivity is achieved by using fluoroboric acid as masking agent. Improvements in the method of sample decomposition also contribute to the rapidity of the method.

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