| 铜离子选择电极测定磁钢中钴 |
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| 引用本文： | 阎锋,李华为,吴旭东.铜离子选择电极测定磁钢中钴[J].辽宁大学学报(自然科学版),1994(4). |
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| 作者姓名： | 阎锋 李华为 吴旭东 |
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| 作者单位： | 沈阳师范学院，沈阳电冰箱厂 |
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| 摘 要： | 钴加入钢铁中可以提高高速钢的高温硬度、耐热钢的高温强度等，其含量从百分之几至百分三十几不等，磁钢便是一种含钴、镍量较高的新型钢材．本文以Ｃｕ－ＥＤＴＡ为指示剂，铜离子选择电极指示滴定终点，用ＥＤＴＡ标准溶液络合滴定磁钢中的钴．在强酸性条件下，对大量铁及部分镍进行萃取分离，消除干扰，以ＫＮＯ＿３为离子强度调节剂，ＨＡｃ－ＮａＡｃ为缓冲液，在ｐＨ６．５的条件下进行测定，取得较好结果，且方法简便、快速．
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| 关 键 词： | 铜离子选择电极 磁钢 钴． |
Determination of Cobalt in Magnetic Steel by Copper ion Selective Electrode |
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| Yan Feng.Determination of Cobalt in Magnetic Steel by Copper ion Selective Electrode[J].Journal of Liaoning University(Natural Sciences Edition),1994(4). |
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| Authors: | Yan Feng |
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| Institution: | Yan Feng Department of Chemistry,Liaoning University Li Huawei Shenyang Teachers College Wu Xudong Shenyang Refrigerator Factory |
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| Abstract: | This paper reports a complexometric titration of cobalt in magnetic steel by EDTA,Cu-EDTA is used as indicatiir,copper ion selective electrode indica-ting titration end point.At high acidity,the interference of large quaiitities of iron and a portion of nickel is eliminated by extractive separation.The determina-tion is carried out at pH6.5 using KNO_3 as ionic strength adjustor,HAc-NaAcas buffer solution.The result is most satisfactory.The method is simple convenient and speedy. |
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| Keywords: | Copper ion selective electrode Magnetic steel Cobalt |
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