| 催化荧光法测定痕量亚硝酸根 |
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| 引用本文： | 唐宁莉. 催化荧光法测定痕量亚硝酸根[J]. 桂林工学院学报, 2005, 25(4): 552-555 |
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| 作者姓名： | 唐宁莉 |
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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： | 在稀磷酸介质中，痕量亚硝酸根能催化溴酸钾氧化荧光桃红并使其荧光猝灭，且荧光猝灭程度与亚硝酸根加入量成比例关系，据此建立了催化荧光法测定痕量亚硝酸根的新方法．其激发波长λex=435．8nm，发射波长λem=560nm，测定亚硝酸根的线性范罔为0．0-11ng／mL，检出限为0．37ng／mL．将拟定的方法用于水样、蔬菜、粮食中亚硝酸根含量的测定，结果与Griss法一致．
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| 关 键 词： | 亚硝酸根 荧光桃红 催化荧光法 |
| 文章编号： | 1006-544X(2005)04-0552-04 |
| 收稿时间： | 2004-07-26 |
| 修稿时间： | 2004-07-26 |
Catalytic Fluorimetric Determination of Trace Nitrite |
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| TANG Ning-li. Catalytic Fluorimetric Determination of Trace Nitrite[J]. Journal of Guilin University of Technology, 2005, 25(4): 552-555 |
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| Authors: | TANG Ning-li |
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| Affiliation: | Department of Materials and Chemistry Engineering , Guilin University of Technology , Guilin 541004, China |
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| Abstract: | A new sensitive kinetic method is proposed for the determination of nitrite. The method is based on catalytic effect on the reaction of potassium bromate oxidation of tetraehlorotetrabromo - fluororescein sodium salt in dilute phosphoric acid . The detection limit of this method is 0. 37 ng/mL and the linear response is with in the range of 0. 0 - 11 ng/mL. The proposed method is applied to the determination of nitrite in water samples, vegetables with satisfactory results. |
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| Keywords: | nitrite tetrachloro-tetrabromo-fluororescein sodium salt(TCTBF) catalytic fluorimetry |
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