| 锂离子选择性电极的研究 |
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| 引用本文： | 张增荣 俞汝勤. 锂离子选择性电极的研究[J]. 高等学校化学学报, 1993, 14(12): 1658-1660 |
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| 作者姓名： | 张增荣 俞汝勤 |
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| 作者单位： | 湖南大学化学化工系, 长沙 410082 |
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| 摘 要： | 根据锂的萃取化学,以1-(苯基偶氮)萘酚-2(ST-I)及氧化三辛基膦(TOPO)为载体和协萃剂制备了PVC膜锂离子选择性电极.考察了增塑剂等因素对电极响应性能的影响,并对膜组成进行优化.以含4.5mgST-I,9.0mgTOPO及180mg磷酸三丁酯的膜制备的电极在pH8.5的tris缓冲底液中对锂呈线性电位响应,斜率为51.7mV/pC,线性范围为2.0×10-5～1.0×10-1mol/L,检测下限为4.0×10-6mol/L.电极用于碳酸锂片剂中锂含量测定,结果满意.
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| 关 键 词： | 1-(苯基偶氮)萘酚-2 氧化三辛基膦 锂 离子选择电极 |
| 收稿时间： | 1992-01-12 |
Lithium Ion-Selective Electrode |
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| ZHANG Zeng-Rong,YU Ru-Qin. Lithium Ion-Selective Electrode[J]. Chemical Research In Chinese Universities, 1993, 14(12): 1658-1660 |
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| Authors: | ZHANG Zeng-Rong YU Ru-Qin |
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| Affiliation: | Department of Chemistry and Chemical Engineering, Hunan University, Changsha, 410082 |
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| Abstract: | Making use of the extraction chemistry of lithium, a PVCmembrane lithium ion-selective electrode based on 1-phenylazonaphthol-2 (sutan Ⅰ) and tri-n-octylphosphine oxide (TOPO) was prepared.The membrane composition was optimized by orthogonal polynomial regression.Amembrane containing 4.5 mg sutan Ⅰ and 9.0 mg TOPOand 180 mg solvent mediator was obtained.The slope of the electrode was 51.7 mV/decade, with the linear range of 2.0 × 10-5-0.1 mol/Land the detection limit of 4.0× 10-6 mol/L.The electrode showed moderate selectivities for Li+ over Na+ and K+, and was applied to the assary of lithium in Li2CO3 tablets with satisfactory results. |
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| Keywords: | 1-Phenylazonaphthol-2 Tri-n-octylphosphine oxide Lithium Ion-selective elec-trode |
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