| 碘离子选择性电极测定海带、紫菜中碘及碘的浸出率 |
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| 引用本文： | 秦汉明.碘离子选择性电极测定海带、紫菜中碘及碘的浸出率[J].化学世界,2002,43(11):572-573. |
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| 作者姓名： | 秦汉明 |
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| 作者单位： | 江汉大学城建环保系,湖北,武汉,430019 |
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| 摘 要： | 提出了用碘离子选择性电极测定海带、紫菜中碘的方法。在 0 .2 0 mol/L KNO3 ,1 .0× 1 0 -3mol/L Na2 SO3 ,p H 5 .0～ 6.0溶液中 ,碘离子浓度对数值在 5 .0× 1 0 -7～ 1 .0× 1 0 -1mol/L范围内与电位呈良好线性关系 ,检出限为 3× 1 0 -7mol/L,准确测定了海带、紫菜中碘的含量 ,对浸泡时间与海带中碘的浸出率关系进行了研究。回收率 95 %～ 98% ,相对标准偏差小于 2 .6%。
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| 关 键 词： | 海带 紫菜 碘 离子选择性电极 浸出率 |
| 文章编号： | 0367-6358(2002)11-0572-02 |
Determination of Iodine in Kelp and Porphyra Capensi with Ion-selective Electrode |
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| QIN Han,ming.Determination of Iodine in Kelp and Porphyra Capensi with Ion-selective Electrode[J].Chemical World,2002,43(11):572-573. |
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| Authors: | QIN Han ming |
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| Abstract: | A method for the ISE determination of iodine in kelp and porphyra capensi is proposed. A mixed solution of 0.20 mol/L KNO 3 and 1.0×10 -3 mol/L Na 2SO 3 with pH 5.0~6.0 is used as the electrolyte. The change of potential with log c F - is linear in the range of 5.0×10 -7 ~1.0×10 -1 mol/L, and the detection limit is 3×10 -7 mol/L. The recovery is 95%~98% and the RSD is less than 2.6%. |
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| Keywords: | kelp porphyra capensi iodine ion selective electrode extraction percentage |
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