| 氟化物置换-EDTA滴定钯氧化铝催化剂中的铝量 |
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| 引用本文： | 姜少壮,金娅秋,宋建强,方卫,杨晓滔,付仕梅,鲁瑞智,曾荷峰. 氟化物置换-EDTA滴定钯氧化铝催化剂中的铝量[J]. 贵金属, 2019, 40(4): 28-33 |
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| 作者姓名： | 姜少壮 金娅秋 宋建强 方卫 杨晓滔 付仕梅 鲁瑞智 曾荷峰 |
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| 作者单位： | 昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106;昆明贵金属研究所,贵研铂业股份有限公司 稀贵金属综合利用新技术国家重点实验室,昆明 650106 |
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| 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。
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| 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 |
| 收稿时间： | 2019-03-22 |
Determination of Al Content in Pd/Al2O3 Catalyst by Fluoride Replacement-EDTA Titration |
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| JIANG Shaozhuang,JIN Yaqiu,SONG Jianqiang,FANG Wei,YANG Xiaotao,FU Shimei,LU Ruizhi and ZENG Hefeng. Determination of Al Content in Pd/Al2O3 Catalyst by Fluoride Replacement-EDTA Titration[J]. Precious Metals, 2019, 40(4): 28-33 |
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| Authors: | JIANG Shaozhuang JIN Yaqiu SONG Jianqiang FANG Wei YANG Xiaotao FU Shimei LU Ruizhi ZENG Hefeng |
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| Affiliation: | Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China and Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for ComprehensiveUtilization of Platinum, Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China |
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| Abstract: | 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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| Keywords: | analytical chemistry palladium-alumina catalysts aluminum fluoride replacement EDTA-titration |
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