| 光化学还原-硅钼蓝光度法测定Pd/Al2O3催化剂中的硅 |
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| 引用本文： | 宋建强,金娅秋,方 卫,郭帅龙,冯 璐,任传婷,戴云生,唐 春.光化学还原-硅钼蓝光度法测定Pd/Al2O3催化剂中的硅[J].贵金属,2016,37(4):9-14. |
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| 作者姓名： | 宋建强 金娅秋 方 卫 郭帅龙 冯 璐 任传婷 戴云生 唐 春 |
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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 |
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| 摘 要： | 研究了β型硅钼黄的形成及其被乙醇光化学还原为硅钼蓝的影响条件，建立了乙醇光化学还原-硅钼蓝分光光度法测定氧化铝载钯催化剂中硅含量的新方法。结果表明，在810 nm波长处，硅量在0~2μg/mL范围内硅钼蓝吸光度符合朗伯-比耳定律；分取溶解后的催化剂溶液，控制测定试液钼酸铵浓度为5 g/L、盐酸浓度为0.9 mol/L，以乙醇作为光催化还原剂，用UVA紫外灯为光源照射25 min，测定样品中含量为0.1%~1%的硅，RSD=1.43%(n=9)，加标回收率98.5%~101%。
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| 关 键 词： | 分析化学 硅 光化学还原 硅钼蓝光度法 Pd/Al2O3催化剂 |
| 收稿时间： | 2016/3/15 0:00:00 |
Determination of Silicon in Pd/Al2O3 Catalyst by Photochemical Reduction-Silicon Molybdenum Blue Spectrophotometry |
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| SONG Jianqiang,JIN Yaqiu,FANG Wei,GUO Shuailong,FENG Lu,REN Chuanting,DAI Yunsheng and TANG Chun.Determination of Silicon in Pd/Al2O3 Catalyst by Photochemical Reduction-Silicon Molybdenum Blue Spectrophotometry[J].Precious Metals,2016,37(4):9-14. |
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| Authors: | SONG Jianqiang JIN Yaqiu FANG Wei GUO Shuailong FENG Lu REN Chuanting DAI Yunsheng and TANG Chun |
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| Affiliation: | Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China,Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China and Kunming Institute of Precious Metals, State Key Laboratory of Advanced Technologies for Comprehensive Utilization of Platinum Metals, Sino-Platinum Metals Co. Ltd., Kunming 650106, China |
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| Abstract: | Photochemical reduction-silicon molybdenum blue spectrophotometry, a new analytical method, was used to measure silicon content in Pd/Al2O3 catalyst. The conditions for photo-reducingβ-silicon molybdenum yellow into silicon molybdenum blue with ethanol were investigated. The results showed that the changes in absorbance complied with Beer-Lambert law when the silicon content was in 0~2 μg/mL concentration range. The method applied to the determination of 0.1%~1% silicon contents in Pd/Al2O3 catalyst with satisfactory results. The recovery was between 98.5%~101% with aRSDof 1.43% (n=9). |
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| Keywords: | analytical chemistry silicon photochemical reduction silicon-molybdenum blue spectro- photometry Pd/Al2O3catalyst |
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