Determining five oxides in manganese ores using inductively coupled plasma-optical emission spectroscopy
ZHANG Peng-peng1,2(), XU Bing-xu3(), HU Meng-ying1,2, Xu Jin-li1,2, LIU Bin1,2, ZHANG Ling-huo1,2, BAI Jin-feng1,2
1. Institute of Geophysical and Geochemical Exploration, Chinese Academy of Geological Sciences, Langfang 065000, China 2. Key Laboratory of Geochemical Exploration, Ministry of Natural Resources, Langfang 065000, China 3. Institute of Comprehensive Utilization of Mineral Resources, Chinese Academy of Geological Sciences, Chengdu 610041, China
Manganese ores are significant raw materials in the iron and steel industry. Accurately determining their major components is critical for the analysis of manganese ore composition. Based on three acid dissolution systems, i.e., aqua regia (HNO3+HC), tetracid (HNO3+HF+HClO4+HCl), and pentaacid (HNO3+HF+H2SO4+HClO4+HCl) solutions, and three extraction conditions, i.e., hydrochloric acid, nitric acid, and aqua regia, this study determined five oxides in manganese ores using inductively coupled plasma-optical emission spectroscopy (ICP-OES). The results indicate that the pentaacid or pentaacid solution and the extraction with hydrochloric acid achieved encouraging determination results. Spectral lines with wavelengths of 766.490 nm (K), 184.006 nm (Ca), 589.592 nm (Na), 279.553 nm (Mg), and 396.152 nm (Al) were analyzed. The possible interference in the determination process was eliminated based on the standard solution matrix matching principle. The detection limits of Na, Mg, K, Ca, and Al were 0.000 27%, 0.000 21%, 0.000 15%, 0.000 17%, and 0.000 23%, respectively. The determination results of all five oxides in two national primary reference materials for manganese ores showed relative standard deviations (RSD) not exceeding 5.0%, suggesting fair precision. The verification results of all five oxides in five reference materials showed relative errors (RE) below 10%, demonstrating high accuracy, with the measured values roughly consistent with the recommended values. The spiked determination of five oxides in five manganese ores with unknown content yielded recovery rates ranging from 90% to 110%, suggesting that the accuracy met the analytical requirements. Therefore, the ICP-OES method simplifies sample pretreatment, improves efficiency, and reduces costs, thereby applying to batch sample analysis. The verification using reference materials demonstrates that its accuracy and precision meet industrial standards, establishing the ICP-OES method as an effective approach for determining the five oxides in manganese ore samples.
Standardization Administration of the People's Republic of China. GB/T1511—2016Manganeseores—Determinationofcalciumandmagnesiumcontents—EDTAtitrimetricmethod[S]. Beijing: Standards Press of China, 2016.
Standardization Administration of the People's Republic of China. GB/T1513—2006Manganeseores—Determinationofcalciumandmagnesiumcontents—Flameatomicabsorptionspectrometricmethod[S]. Beijing: Standards Press of China, 2007.
Standardization Administration of the People's Republic of China. GB/T1510—2016Manganeseores—Determinationofaluminiumcontent—EDTAtitrimetricmethod[S]. Beijing: Standards Press of China, 2016.
China Iron and Steel Association. GB/T14949.7—1994Manganeseores—Determinationofsodiumandpotassiumcontents[S]. Beijing: Standards Press of China, 1994.
[5]
Chen T, Dai J R. Determination of calcium oxide and magnesium oxide in manganese ore by EDTA titration[J]. Chinese Journal of Analysis Laboratory, 2008, 27(S2):311-313.
Zhang W Y, Xu X H. Determination of major components in aluminum ore,iron ore,calcium ore,magnesium ore and manganese ore by X-ray fluorescence spectrometry with fusion sample preparation[J]. Metallurgical Analysis, 2022, 42(4):83-89.
Xie X Y, Wu W Q, Li F, et al. Determination of thallium in manganese ore by inductively coupled plasma atomic emission spectrometry after ion exchange separation[J]. Metallurgical Analysis, 2015, 35(8):61-65.
Jiang S J, Gao Y H, Hu X G, et al. Determination of minor elements in manganese ore by lithium metaborate melting ICP-AES[J]. Gansu Science and Technology, 2012, 28(14):35-37.
Liu L Z, Deng Q D, Xu G, et al. ICP-AES determination of aluminum,magnesium and phosphorus in manganese ores with microwave assisted sample digestion[J]. Physical Testing and Chemical Analysis,Part B:Chemical Analysis, 2011(11):1283-1285.
Jin X Z, Chen J G, Liang F, et al. Determination of major,minor and trace elements in manganese ores by alkali fusion-ICP-AES[J]. Journal of Instrumental Analysis, 2009, 28(2):150-156.
Zhang G, Liu Y N, Duan N, et al. Determination of titanium,vanadium and strontium in manganese ore by inductively coupled plasma mass spectrometry with high-pressure closed digestion[J]. Metallurgical Analysis, 2014, 34(12):39-43.
Wu L, Liu Y B, Wang J S, et al. Sample treatment methods for determination of rare earth elements in manganese ore by high-pressure closed digestion-inductively coupled plasma-mass spectrometry[J]. Rock and Mineral Analysis, 2018, 37(6):637-643.
