一种汽车净化催化剂中贵金属元素含量的测定方法
By employing a composite melting decomposition, acid leaching, tin-tellurium co-precipitation enrichment, and internal standard-corrected spectroscopic determination method, the problem of complete decomposition and accurate determination of precious metal elements in automotive purification catalysts has been solved, achieving detection results with high sensitivity and stability.
CN121933502BActive Publication Date: 2026-07-17JIANGSU ENTRY-EXIT INSPECTION & QUARANTINE BUREAU IND PROD TESTING CENT +4
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- JIANGSU ENTRY-EXIT INSPECTION & QUARANTINE BUREAU IND PROD TESTING CENT
- Filing Date
- 2026-03-25
- Publication Date
- 2026-07-17
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Abstract
本发明提供了一种汽车净化催化剂中贵金属元素含量的测定方法，属于分析检测技术领域。该方法通过构建由过氧化钠、无水偏硼酸钠及钨酸钠组成的复合熔融体系，对汽车净化催化剂样品进行高效熔融分解，并结合盐酸与酒石酸复合酸化体系实现熔融物的完全浸取，在此基础上引入锡‑碲共沉淀富集技术，对铂、钯、铑等痕量贵金属元素进行选择性沉淀和有效富集，显著降低基体干扰；随后通过加入铟内标溶液并采用电感耦合等离子体发射光谱法进行定量测定，从而实现贵金属元素的高灵敏度、高准确度分析。本发明方法有效解决了现有技术中样品分解不完全、贵金属回收率低、基体干扰严重及检测结果稳定性差等问题。
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