Abstract：The mass fraction of copper in industrial nickel sulfate of the by-product in copper smelting was 1%-5%. If the content of nickel was determined by dimethylglyoxime gravimetry, which was specified in chemical industrial standard method of HG/T 2824-2009 Industrial nickel sulfate, the determination would be interfered by copper. The analysis method of nickel in copper-containing industrial nickel sulfate was modified. After copper was firstly masked with sodium thiosulfate, the content of nickel was determined by dimethylglyoxime gravimetry. Consequently, a determination method of nickel in copper-containing industrial nickel sulfate was established by dimethylglyoxime gravimetry after masking copper by sodium thiosulfate. The optimum experimental conditions were obtained: the pH for masking of copper by sodium thiosulfate was 5-6, and the pH for dimethylglyoxime precipitation was 8.5. The content of nickel in two industrial nickel sulfate samples was determined according to the experimental method, and the relative standard deviation (RSD, n=10) was 0.63% and 0.28%, respectively. The results were basically consistent with those obtained by standard method of YS/T 252.1-2007.
王亚秦,付海阔.工业硫酸镍生产技术进展[J].化工进展,2015,34(8):3085-3104.WANG Ya-qin,FU Hai-kuo.Progresses in the preparation technologics of nickel sulfate for industrial use[J].Chemical Industry and Enineering Progress,2015,34(8):3085-3104.
[3]
戴学谦,胡建春,王珺,等.电解重量法测定烧结镍中镍[J].冶金分析,2008,28 (8):27-31.DAI Xue-qian,HU Jian-chun,WANG Jun,et al.Determination of nickel in nickel sinter by electrolytic gravimetry[J].Metallurgical Analysis,2008,28(8):27-31.
[4]
胡建春,赵琎,张瑞霖,等.电解重量法和电感耦合等离子体原子发射光谱法在测定氧化镍中镍钴铜锌铁锰中的应用[J].冶金分析,2015,35(11):28-33.HU Jian-chun,ZHAO Jin,ZHANG Rui-lin,et al.Application of electrolytic gravimertry and inductively coupled plasma atomic emission spectrometry in the determination of nickel,cobalt,copper,zinc,iron and manganese in nickel oxide[J].Metallurgical Analysis,2015,35(11):28-33.
[5]
刘宪彬,罗辉,路宁宁,等.丁二酮肟分光光度法测定高炉冶炼镍基体料中镍[J].冶金分析,2012,32(增:化学分册):428-431.LIU Xian-bin,LUO Hui,LU Ning-ning,Determination of nickel in blast furnace smelting nickel matrix material by dimethylglyoxime spectrophotometry[J].Metallurgical Analysis,2012,32(Supplement:Chemistry):428-431.
[6]
王永利.过硫酸铵-丁二酮肟示差分光光度法测定镍铁中的镍[J].东北林业大学学报,2001,29(4):82-83.WANG Yong-li.Determination of Ni in nickel errite by ammonium persulfate-dimethyloxime differential spectrophotometry method[J].Journal of Northeast Forestry University,2001,29(4):82-83.
[7]
吴诚,李茂奎,张平建,等.丁二酮肟沉淀分离-络合滴定法测定镍铁中镍[J].莱钢科技,2008,32(2):51-53.WU Cheng,LI Mao-kui,ZHANG Ping-jian,et al.Determination of nickel in nickel iron with dimethylglyoxime preclpitate separation-compleximetry[J].Laigang Science & Technology,2008,32(2):51-53.
