| 沈淑君.核固红-亮绿双指示剂催化光度法测定痕量Pb(Ⅱ)[J].井冈山大学自然版,2016,(3):30-34 |
| 核固红-亮绿双指示剂催化光度法测定痕量Pb(Ⅱ) |
| Dual-indicator catalytic spectrophotometric determination of trace lead(Ⅱ) with nuclear fast red-brilliant green system |
| 投稿时间：2016-01-12 修订日期：2016-02-26 |
| DOI：10.3969/j.issn.1674-8085.2016.03.007 |
| 中文关键词: 光度法 核固红 亮绿 双指示剂 铅 |
| 英文关键词: catalytic spectrophotometry nuclear fast red brilliant green dual-indicator lead |
| 基金项目: |
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| 摘要点击次数: 1900 |
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| 中文摘要: |
| 研究了1.0 mol/L硫酸介质中,痕量铅能同时催化溴酸钾氧化核固红和亮绿。通过测定455 nm和595 nm下吸光度值的变化及其与铅浓度的线性关系,建立了双波长双指示剂测量痕量铅的新方法。其线性范围是0.025~2.0 μg/25 mL,其检出限为9.6×10-11 g/mL。本方法灵敏度高,可用于水样及土壤样品的测定,结果比较满意。 |
| 英文摘要: |
| Lead (Ⅱ) was determined by dual-indicator catalytic spectrophotometric method which was based on the lead (Ⅱ) catalyzing oxidation of nuclear fast red (NFR) and brilliant green by potassium bromate in the sulfuric acid medium. A new catalytic spectrophotometric method for the determination of trace lead (Ⅱ) was established by the absorbance system at 455 and 595 nm. The linear range of the determination was 0.025~2.0 μg/25mL, the detection limit for lead (Ⅱ) was 9.6×10-11 g/mL. It is a highly sensitive and effective method for the determination of trace lead (Ⅱ) in water and soil samples. |
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