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| 光化学还原-硅钼蓝光度法测定Pd/Al2O3催化剂中的硅 |
| Determination of Silicon in Pd/Al2O3 Catalyst by Photochemical Reduction-Silicon Molybdenum Blue Spectrophotometry |
| 投稿时间：2016-03-15 |
| DOI： |
| 中文关键词: 分析化学 硅 光化学还原 硅钼蓝光度法 Pd/Al2O3催化剂 |
| 英文关键词: analytical chemistry silicon photochemical reduction silicon-molybdenum blue spectro- photometry Pd/Al2O3catalyst |
| 基金项目: |
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| 摘要点击次数: 3067 |
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| 中文摘要: |
| 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0~2 μg/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%。 |
| 英文摘要: |
| Photochemical reduction-silicon molybdenum blue spectrophotometry, a new analytical method, was used to measure silicon content in Pd/Al2O3 catalyst. The conditions for photo-reducing β-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 a RSD of 1.43% (n=9). |
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