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痕量钴镍的催化极谱同时测定的研究
引用本文:梁禄,石教龙.痕量钴镍的催化极谱同时测定的研究[J].四川大学学报(自然科学版),1990,27(2):210-213.
作者姓名:梁禄  石教龙
作者单位:四川大学化系学,四川大学化学系84级分析班 毕业生
摘    要:钴(Ⅱ)镍(Ⅱ)在丁二酮肟、亚硝酸钠、磺基水杨酸和NH_4OH-NH_4CI的溶液中,均能产生相当灵敏的催化波,其峰电位分别为-1.27V(钴)和-1.08V(镍)(Vs,S.C.E).在浓度为1.0×10~(-10)~1.0 ×10~(-6)g/mL(钴)和1.0×10~(-9)~1.0×10~(-6)g/mL(镍)的范围内,峰高与浓度成线性关系.用该方法同时测定了水体中、头发中、高纯氧化铜及钴矿中的痕量钴和镍.还测定了维生素B_(12)和C中的痕量钴.

关 键 词:    痕量  测定  催化波  极谱法

CATALYTIC POLAROGRAPHIC SIMULTANEOUS DETERMINATION OF THE TRACE AMOUNT OF NICKEL AND COBALT
Liang Lu Shi Jiaoloiig.CATALYTIC POLAROGRAPHIC SIMULTANEOUS DETERMINATION OF THE TRACE AMOUNT OF NICKEL AND COBALT[J].Journal of Sichuan University (Natural Science Edition),1990,27(2):210-213.
Authors:Liang Lu Shi Jiaoloiig
Institution:Department of Chemistry
Abstract:Nickel and cobalt will produce the considerable sensitive catalytic waves in the solution of dimethyl-glyoxime, sodium nitrite, sulfosalicylic acid and NH4OH-NH4C1, and this peak potential will appear at -1.08V(\s, S. C. E. ) and -1.27V for Ni and Co respectively. The peak height is linearly relatec to the ion concentration in the range of l.0x 10-1.0x 10-6 g/mL (Co) and l.0X10-9 -1.0X1.0-6 g/mL (Ni). The polarographic behaviour of the catalytic waves has been studied. This method can be used for the simultaneous determination of the trace amount of Co and Ni in water, human hair, high pure cupric oxide and cobalt ore. It can be also used for the determination of the trace cobalt in vitmine E12 and C with satisfactory results.
Keywords:catalytic polarographic  simultaneous determination  trace amount of cobalt and Nickel  dimethylglyoxime  sodium nitrite  
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