本文研究了在溴化十六烷基三甲铵存在下钯与PAR的显色条件。在pH5—8的溶液中,最大吸收峰位于536nm,表观摩尔吸光系数为2.86×10~4,钯量在0—3.6μg/mL范围内服从比尔定律。络合物组成比Pd:PAR=1:1。本法选择性较好、允许大量铁、铝、锰、铅、钴、铑、锇、铱等元素共存。方法用于活性碳催化制钯中微量钯的测定,获得满意结果。 In this paper, the color conditions of palladium and PAR in the presence of cetyltrimethylammonium bromide were studied. In the solution of pH5-8, the maximum absorption peak was at 536nm, the apparent molar absorptivity was 2.86 × 10 ~ 4, and the Beer’s law was obeyed in the range of 0-3.6μg / mL. Complex composition ratio Pd: PAR = 1: 1. The law of selectivity is good, allowing a large number of iron, aluminum, manganese, lead, cobalt, rhodium, osmium, iridium and other elements coexist. The method was applied to the determination of trace palladium in palladium catalyzed by activated carbon, and satisfactory results were obtained.