| 刘晓颖，龙先良.连续流动分析法测定蔬菜中氟化物含量[J].广东农业科学,2013,40(13):104-105 |
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连续流动分析法测定蔬菜中氟化物含量 |
| Continuous-flow-injection analysis of fluoride in vegetables |
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| DOI： |
| 中文关键词: 连续流动分析法(CFA) 蔬菜 氟化物 |
| 英文关键词: continuos-flow-injection analysis vegetables fluoride |
| 基金项目: |
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| 中文摘要: |
| 根据蔬菜中氟化物在酸性条件下馏出后，在乙酸盐介质中与氟试剂、硝酸镧反应生成蓝紫色三元络合物的原理，采用连续流动分析法(CFA)测定蔬菜中的氟化物含量。该方法线性范围为0~20 mg/L，线性关系为0.9998，检出限为0.5 mg/kg，加标回收率为95%~102% ，该方法操作方便、精密度和准确度高、分析速度快，特别适合大批样品的测定。 |
| 英文摘要: |
| The determination of fluoride is based on the alizarin fluorine blue method. After distillation at 150℃, fluoride reacts with alizarin fluorine blue/ lanthanum reagent to form a lilac - blue complex, which is measured colorimetrically when the complex absorbs at 620 nm.Determination of fluoride in Vegetables by Continuous Flow Analyzer (CFA), the linear range was 0~20 mg/L, the correlative coefficient was 0.9998, the detection limit was 0.5 mg/kg,the recovery rates were in the range 95%~102%. The method has been applied to the determination of fluoride in vegetables with satisfactory results. |
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