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| 铅试金法测定硅氧烷铂配合物中的铂 |
| Determination of Platinum Content in Platinum-siloxane Complex by Lead Fire Assay |
| Received:April 17, 2017 |
| DOI： |
| 中文关键词: 分析化学 铅试金 氯化铵沉淀法 光度法 铂 1,3-二乙烯基-1,1,3,3-四甲基二硅氧烷铂 |
| 英文关键词: analytical chemistry lead fire assaying ammonium chloride precipitation spectrophotometry platinum platinum-1,3-divinyl-1,1,3,3-tetramethyldisiloxane |
| 基金项目: |
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| 中文摘要: |
| 硅氧烷铂配合物难于溶解。采用铅试金富集分离1,3-二乙烯基-1,1,3,3-四甲基二硅氧烷铂配合物，以银作灰吹保护剂，得到的合粒经王水溶解后，采用氯化铵沉淀法和DDO光度法测定得到铂的合量。方法回收率为99.25%~100.2%，相对标准偏差(RSD)为0.64%~0.78%，满足样品中铂含量测定要求。 |
| 英文摘要: |
| The platinum-siloxane complex is difficult to to be dissolved. Platinum in the platinum(0)- 1,3-divinyl-1,1,3,3-tetramethyldisiloxane complex was firstly enriched by lead fire assay using silver as the protective agent for the cupellation. And then the resulting silver alloy was dissolved in aqua regia and platinum in the solution was precipitated by using ammonium chloride and separated out by filtration. The amount of platinum remaining in the filtrate was determined by DDO spectrophotometry. The recovery rate was 99.25%~100.2%, and the relative standard deviation (RSD) was 0.64%~0.78%, meeting the requirements for the determination of platinum content in the sample. |
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