溶样方法对不同陶瓷基材DPF中铂和钯测定的影响

发布时间：2018-05-12 23:36

  本文选题：分析化学 + 酸溶　； 参考：《贵金属》2017年04期

【摘要】：柴油颗粒过滤器(DPF)的不同陶瓷基材酸法溶解效果有差异,影响样品中铂钯含量测定。对比实验表明,与标准酸溶法相较,碱熔法对不同陶瓷基材均有较好的溶解效果,但操作稳定性较差。对钛酸铝基材样品,用正交试验法考察了多种酸溶试剂的影响,优选出的酸溶试剂配比为采用8 mL盐酸,4 mL硝酸,2 mL氢氟酸溶解0.25 g样品,测定铂、钯的回收率为97.1%、98.7%,相对标准偏差分别为2.86%、1.50%,与标准酸溶法处理堇青石基材和碳化硅基材样品所得结果相当。
[Abstract]:The acid dissolution effect of different ceramic substrates is different, which affects the determination of platinum and palladium in the samples. Compared with the standard acid dissolution method, the alkali melting method has better dissolution effect on different ceramic substrates, but the operation stability is poor. The effects of various acid solubilizing reagents on aluminum titanate substrate samples were investigated by orthogonal test. The optimum ratio of acid solubilizing reagents was 8 mL 4 mL nitrite 2 mL hydrofluoric acid dissolved 0.25 g sample, and platinum was determined. The recovery of palladium was 97.1% and 98.7%, and the relative standard deviation was 2.86% and 1.50% respectively. The results were similar to those of cordierite base material and silicon carbide substrate sample treated by standard acid solution method.
【作者单位】： 中国汽车技术研究中心;
【分类号】：O657.31;TQ174.7
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本文编号：1880670