Determination of sulfate in purification liquid for cobalt productionby inductively coupled plasma atomic emission spectrometry
XU Yan-yan1,2, ZHU Guo-zhong1,2, CHAI Jin-yu3, YAN Ke-yu1,2 PANG Yan1,2, HAO Feng-mei1,2
1. National Nickel and Cobalt Advanced Materials Engineering Research Center, Lanzhou 730101, China; 2. Gansu Jingpu Testing Technology Co., Ltd., Lanzhou 730101, China; 3. Jinchuan Group Co.,Ltd., Jinchang 737100, China
Abstract：In order to accurately determine the content of sulfate (SO2-4) in purification liquid for cobalt production [CoCl2 and Co(NO3)2], the determination method and influencing factors by inductively coupled plasma atomic emission spectrometry (ICP-AES) were studied. S 180.669nm was selected as the analytical line. The effect of radio frequency generation power, atomizing gas flow, auxiliary gas flow, solution acidity and cobalt matrix on determination was investigated. The matrix effect could be eliminated by matrix matching method to prepare the calibration curve. When the mass concentration of cobalt in sample solution was 20.0g/L, the detection limit of SO2-4 was 0.0008g/L. The proposed method was applied to the determination of SO2-4 in purification liquid for cobalt production. The relative standard deviation (RSD, n=11) was 8.4% and 6.7%, respectively. The spiked recoveries were between 93% and 107%. The experimental method was used for the determination of S (in SO2-4) in nickel protoxide and cobaltosic oxide. The found results were basically consistent with those obtained by standard method YS/T 710.3-2009.
赵声兰,陈朝银.湿法磷酸中硫酸根含量的测定[J].理化检验:化学分册,1999,35(3):27-28.ZHAO Sheng-lan,CHEN Chao-yin.Determination of SO2-4 in wet process phosphoric acid[J].Physical Testing and Chemical Analysis Part B:Chemical Analysis,1999,35(3):27-28.
[2]
张科翠,张新涛,潘丽娟,等.吸光比浊法测定硝酸钴溶液中硫酸根[J].冶金分析,2013,33(11):63-66.ZHANG Ke-cui,ZHANG Xin-tao,PAN Li-juan,et al.Determination of sulfate in cobalt nitrate solution by turbidimetric method[J].Metallurgical Analysis,2013,33(11):63-66.
[3]
蒋快良,龙桂花,谭群英,等.分光比浊法测定氯化钴中硫酸根[J].冶金分析,2012,32(11):72-75.JIANG Kuai-liang,LONG Gui-hua,TAN Qun-ying,et al.Determination of sulfate radical in cobalt chloride by spectroturbidimetry[J].Metallurgical Analysis,2012,32(11):72-75.
[4]
李建,计辉,钱玉萍.电感耦合等离子体发射光谱法(ICP-OES)同时测定活性炭中铝、钴、镉、铜、铁、镁、锰、钠、磷、硫10种元素[J].中国无机分析化学,2012,2(1):58-60.LI Jian,JI Hui,QIAN Yu-ping.Simultaneous determination of Al,Co,Cr,Cu,Fe,Mg,Mn,Na,P and S in activated carbon by inductively coupled plasma atomic emission spectrometry[J].Chinese Journal of Inorganic Analytical Chemistry,2012,2(1):58-60.
[5]
王凌,冉文生,张辽生,等.电感耦合等离子体原子发射光谱法测定电解钴中杂质元素[J].福建分析测试,2011,20(6):27-29.WANG Ling,RAN Wen-sheng,ZHANG Liao-sheng,et al.Inductively coupled plasma atomic emission spectrometry determination of impurity elements in electrolytic cobalt[J].Fujian Analysis & Testing,2011,20(6):27-29.
[6]
龚琦.对电感耦合等离子体发射光谱法中一些问题的认识[J].冶金分析,2018,38(9):26-30.GONG Qi.Understanding of some issues about inductively coupled plasma optical emission spectrometry[J].Metallurgical Analysis,2018,38(9):26-30.
