| 氧弹燃烧-氟离子选择电极法测定蔬菜中的氟 |
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| 引用本文： | 果秀敏,杨秀敏,解晓东,方正.氧弹燃烧-氟离子选择电极法测定蔬菜中的氟[J].河北农业大学学报,2009,32(5). |
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| 作者姓名： | 果秀敏 杨秀敏 解晓东 方正 |
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| 作者单位： | 1. 河北农业大学,河北省生物无机化学重点实验室,河北,保定,071001
2. 故城县郑口中学,河北,衡水,053800 |
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| 基金项目： | 河北省教育厅资助项目"华北地区主要蔬菜营养品质评价" |
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| 摘 要： | 本试验建立了一种测定蔬菜中氟含量的新方法。蔬菜经氧弹燃烧处理后在一定浓度的高氯酸和柠檬酸钠的介质中利用氟离子选择性电极法测定其微量氟。菠菜、卷心菜、油菜、生菜、香麦、白菜中氟的测定结果表明,氟离子浓度为1.0×10-2~1.0×10-6mol/L范围内呈现良好线性关系,线性相关系数r为0.999 3,相对标准偏差(RSD)为0.93%~1.91%(n=6),不同添加水平中回收率均在96.4%~105.7%之间。
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| 关 键 词： | 氧弹 高氯酸 氟离子选择电极 |
Determination of fluoride in vegetables by using oxygen bombfluoride ion-selective electrode method |
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| GUO Xiu-min,YANG Xiu-min,XIE Xiao-dong,FANG Zheng.Determination of fluoride in vegetables by using oxygen bombfluoride ion-selective electrode method[J].Journal of Agricultural University of Hebei,2009,32(5). |
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| Authors: | GUO Xiu-min YANG Xiu-min XIE Xiao-dong FANG Zheng |
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| Institution: | GUO Xiu-min1,YANG Xiu-min1,XIE Xiao-dong2,FANG Zheng1(1.Key laboratory Bio-inorganic Chemistry of Hebei,Agricultural University of Hebei,Baoding 071001,China,2.Zhengkou Middle School of Gucheng,Hengshui 053800,China) |
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| Abstract: | A new method for determination of trace fluoride in such vegetables as spinach, cabbage, rape, lettuce, xiangmai, Chinese cabbage was developed. The vegetables were burned in the oxygen bomb with high pressure and pure oxygen and then determined in HClO_4 and NaC_6H_5O_7 · 2H_2O media. The method was linear in the range of 1.0× 10~(-2)～1.0×10~(-6) mol/ L (r=0. 999 3). Excellent recovery and reproducibility values were achieved. The proposed method proved simple, sensitive and suitable for the determination of fluoride in vegetables. |
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| Keywords: | oxygen bomb HClO4 fluoride ion-selective electrode |
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