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以国外近口的淀粉状三氧化二铝为载体的铂催化剂中铂的测定方法还未见报导。样品用王水溶解时,有部分三氧化二铝被浸下来,呈高度分散状扩散于溶液中,数日不能自行凝聚。当用致密滤低过滤时,可全部穿透滤纸。在实验中,如不进行分离,在用沉淀剂沉淀铂时,发现大量三氧化二铝与铂形成共沉淀,致使分析失败。为了分离,曾将300目粒度的粘土铺垫于布氏漏斗中,抽滤时其阻止效果极差。为此,我们选择了羧甲基纤维素、聚丙烯酰胺和
The method of determination of platinum in platinum catalyst supported by amylaceous alumina near abroad has not been reported yet. When the sample is dissolved with aqua regia, part of the aluminum oxide is immersed and dispersed in a highly dispersed state in the solution for several days and can not agglomerate by itself. When using low density filter filter, you can completely penetrate the filter paper. In experiments, if no separation was carried out, a large amount of aluminum oxide was coprecipitated with platinum when the platinum was precipitated with a precipitating agent, resulting in failure of the analysis. For separation, clay of 300 mesh size had been padded into a Buchner funnel, which had a very poor stopping effect when suction filtered. To this end, we chose carboxymethyl cellulose, polyacrylamide and