| 罗丹明6G荧光猝灭法测定痕量次氯酸根 |
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| 引用本文： | 梁爱惠,章表明.罗丹明6G荧光猝灭法测定痕量次氯酸根[J].桂林工学院学报,2008,28(2). |
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| 作者姓名： | 梁爱惠 章表明 |
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| 作者单位： | 桂林工学院,材料与化学工程系,广西,桂林,541004 |
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| 摘 要： | 在稀盐酸介质中,ClO-与过量的I-反应生成I3-,I3-分别与罗丹明6G(RhG)、罗丹明S(RhS)、罗丹明B(RhB)及丁基罗丹明B(b-RhB)形成缔合微粒而导致各体系的荧光分别在550、550、580和580 nm处发生猝灭。ClO-浓度分别在0.015~0.43、0.020~0.35、0.020~0.51、0.020~0.35 mg/L范围内与各体系的荧光猝灭强度具有线性关系。各体系的检出限分别为0.010、0.016、0.028和0.029 mg/L ClO-。据此建立了测定次氯酸根的荧光猝灭分析法,其中RhG-ClO--KI体系不仅灵敏度高而且稳定性较好,用于漂渍液和漂白粉中ClO-的测定,结果满意。
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| 关 键 词： | ClO- 罗丹明6G 缔合微粒 荧光猝灭法 |
Determination of Trace Hypochlorite with Rhodamine 6G by Fluorescence Quenching Method |
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| LIANG Ai-hui,ZHANG Biao-ming.Determination of Trace Hypochlorite with Rhodamine 6G by Fluorescence Quenching Method[J].Journal of Guilin University of Technology,2008,28(2). |
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| Authors: | LIANG Ai-hui ZHANG Biao-ming |
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| Abstract: | ClO-oxidizes excess I-to form I-3 in HCl medium.I-3combines respectively with rhodamine 6G(RhG),rhodamine S(RhS),rhodamine B(RhB) and butyl-rhodamine B(b-RhB) to form association particles,exhibiting fluorescence quenching at 550,550,580 and 580 nm.The fluorescence quenching intensity for the RhG,RhS,RhB and b-RhB systems is proportional to ClO-concentration within the range of 0.015~0.43,0.020~0.35,0.020~0.51 and 0.020~0.35 mg/L,and detection limit of 0.010,0.016,0.028 and 0.029 mg/L,respectively.The RhG system has high sensitivity and good stability.It is used for the determination of ClO-in bleaching powder and liquid with satisfactory result. |
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| Keywords: | ClO- rhodamine 6G association particles fluorescence quenching method |
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