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中文摘要：
在NaOH介质和85°C下,NaH2PO2还原NiCl2生成镍磷微粒的反应很慢,体系的吸光度很小,溶液无色透明。当有Pd（）存在时,反应被催化加速,导致395 nm处的吸光度增加,溶液颜色变深。据此建立一种测定痕量Pd（）的催化光度法,其线性范围为0.09~1.80μg/L Pd（）,检出限为0.03μg/L。该法具有操作简便、选择性好、灵敏度高等特点。
英文摘要：
In the medium of NaOH at 85 °C,the reduction of NiCl2 by NaH2PO2 to NiP particle is slow,its absorbance is weak,and the blank solution is colorless and transparent.Upon addition of palladium（Ⅱ） catalyst,the reaction accelerated,and resulted in the absorbance enhancing at 395 nm.The color changed to dark.Based on those grounds,a catalytic spectrophotometric method was established for the determination of trace Pd（Ⅱ）.Its linear range is 0.09~1.80 μg/L Pd（Ⅱ）,with a detection limit of 0.03 μg/L Pd.This method has the advantage of simplicity,good selectivity,and high sensitivity.
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