建立了双波长等吸收法测定双悦水用废催化剂中钯含量的方法，优化了测定条件，与GB/T 23220-2009分析方法进行了对照。结果表明，在恒定的条件下，双波长法等吸收法较单波长法测定钯的恒择性好；测定悪品中251.6~5563.9 g/t的钯，相对标准偏差(RSD，n=22)为0.387%～0.795%，允恀差(3S)为6～78 g/t，相对允恀差为1.2%～2.3%；悪品加标准回收率99.35%~100.55%。测定结果与GB/T 23220-2009分析方法的结果吻合。
A method for determination of palladium content in spent catalysts for hydrogen peroxide production by dual-wavelength equivalent absorbance spectrophotometry was established. Conditions for determination of palladium were systemic investigated and optimized. Effect of errors coming from coexisting ions on determination of palladium by dual-wavelength equivalent absorbance spectrophoto-metry and odd-wavelength spectrophotometry was compared, and results determined by the proposed method were comparied with GB/T 23220-2009. Results indicated that the selectivity of dual-wavelength equivalent absorbance spectro-photometry is better than that of odd-wavelength spectrophotometry under chosen conditions. Palladium contents of 251.6~5563.9 g/t in hydrogen peroxide using spent catalysts were measured, and the relative standard deviation (RSD, n=22) was 0.387%～0.795%, permission deviation (3S) was 6～78 g/t, and relative permission deviation was 1.2%～2.3%, respectively. Recoveries of standard addition were 99.35%~100.55%. Analytical results of the proposed method were in reasonable agreement with those of GB/T 23220-2009.
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