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| 氟化物置换-EDTA滴定钯氧化铝催化剂中的铝量 |
| Determination of Al Content in Pd/Al2O3 Catalyst by Fluoride Replacement-EDTA Titration |
| 投稿时间：2019-03-22 |
| DOI： |
| 中文关键词: 分析化学 钯氧化铝催化剂 铝含量 氟化物置换 EDTA络合滴定 |
| 英文关键词: analytical chemistry palladium-alumina catalysts aluminum fluoride replacement EDTA-titration |
| 基金项目: |
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| 摘要点击次数: 2556 |
| 全文下载次数: 2463 |
| 中文摘要: |
| 研究了钯氧化铝催化剂中铝含量的EDTA络合滴定法。通过对影响试样溶解、络合及滴定诸因素条件的研究，考察了溶(熔)剂种类、容器材质、滴定前处理方式等对滴定结果的影响，最终建立了高压消化罐+HCl-HF-H2O2/铂金坩埚+碳酸钠-硼砂碱熔+氟化物置换-EDTA络合滴定测定钯氧化铝催化剂中铝含量的2种方法。方法的加标回收率99.18%~100.94%，相对标准偏差优于0.5%。能够满足铝含量准确测定要求。2种方法均已用于5个钯氧化铝催化剂标准样品中铝元素的定值。 |
| 英文摘要: |
| EDTA complexometric titration of aluminum content in palladium-alumina catalyst was studied. The factors affecting dissolution, complexation and titration of samples and the influences of agent types, container materials and pre-titration methods on the titration results were investigated. Two determination methods for aluminum content in palladium-alumina catalysts were established, i.e. high-pressure digestion tank+HCl-HF-H2O2/ platinum crucible+sodium carbonate borax alkali fusion-fluorochemical replacement EDTA complexometric titration. The recoveries of the methods are 99.18%~100.94%, and the relative standard deviation is less than 0.5%. It can meet the requirements of accurate determination of aluminum content. The two methods have been used for the determination of aluminum in five palladium alumina catalyst standard samples. |
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