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GB/T 18882.1-2023 PDF English


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GB/T 18882.1-2023English380 Add to Cart 0-9 seconds. Auto-delivery. Chemical analysis methods of mixed rare earth oxide of ion-absorption rare earth ore - Part 1: Determination of fifteen rare earth oxides composition Valid
GB/T 18882.1-2008English150 Add to Cart 0-9 seconds. Auto-delivery. Chemical analysis methods of mixed rare earth oxide of ion-absorbed type RE ore -- Determination of fifteen REO relative content Obsolete
GB/T 18882.1-2002English239 Add to Cart 2 days Chemical analysis methods for mixed rare earth oxide of ion-absorbed type RE ore -- Determination of total rare earth contents -- Oxalate gravimetric method Obsolete
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GB/T 18882.1-2023: PDF in English (GBT 18882.1-2023)

GB/T 18882.1-2023 GB NATIONAL STANDARD OF THE PEOPLE’S REPUBLIC OF CHINA ICS 77.120.99 CCS H 14 Replacing GB/T 18882.1-2008 Chemical analysis methods of mixed rare earth oxide of ion- absorption rare earth ore - Part 1: Determination of fifteen rare earth oxides composition ISSUED ON: SEPTEMBER 07, 2023 IMPLEMENTED ON: APRIL 01, 2024 Issued by: State Administration for Market Regulation; Standardization Administration of the People’s Republic of China. Table of Contents Foreword ... 3 Introduction ... 5 1 Scope ... 6 2 Normative references ... 7 3 Terms and definitions ... 7 4 Method 1: X-ray fluorescence spectrometry ... 7 5 Method 2: Inductively coupled plasma optical emission spectroscopy ... 21 Chemical analysis methods of mixed rare earth oxide of ion- absorption rare earth ore - Part 1: Determination of fifteen rare earth oxides composition Warning – Personnel using this document shall have practical experience in formal laboratory work. This document does not address all possible security issues. Users shall have certain professional knowledge and skills and fully realize that improper operation may cause gas leakage, current leakage, fire or other serious consequences. 1 Scope This document describes the method for determining the fifteen rare earth oxides composition in mixed rare earth oxides, carbonates, oxalates, and rare earth chloride feed solutions of ion-absorption rare earth ore. This document applies to the determination of fifteen rare earth oxides composition in mixed rare earth oxides, carbonates, oxalates, and rare earth chloride feed solutions of ion-absorption rare earth ore. It contains two methods: Method 1: X-ray fluorescence spectrometry, whose measurement range is shown in Table 1. Method 2: Inductively coupled plasma emission spectrometry, whose measurement range is shown in Table 2. When the measurement ranges of the two methods overlap, Method 1 is recommended as the arbitration method. 4.2.16 Lutetium oxide w (REO) ≥ 99.50%, w (Lu2O3/REO) > 99.99%, calcined at 950 ℃ for 1 h, cooled to room temperature. 4.2.17 Hydrochloric acid (ρ = 1.19 g/mL). 4.2.18 Nitric acid (ρ = 1.42 g/mL). 4.2.19 Hydrogen peroxide [w (H2O2) ≥ 30%]. 4.2.20 Hydrochloric acid solution (1+1). 4.2.21 Hydrochloric acid solution (1+19). 4.2.22 Standard stock solution A: Weigh 0.100 0 g of cerium oxide (4.2.4) into a 100 mL beaker; use a small amount of water (4.2.1) to moisten; add 5 mL of nitric acid (4.2.18); add 5 ~ 10 drops of hydrogen peroxide (4.2.19); heat and dissolve until clear (if not clear, repeat the operation); add 5 mL of hydrochloric acid solution (4.2.20) and evaporate to nearly dryness; repeat once to convert the nitrate into chloride; cool and transfer to a 500 mL volumetric flask; use hydrochloric acid solution (4.2.21) to dilute to the mark; mix well. This solution contains 0.2 mg of cerium oxide in 1 mL. 4.2.23 Standard stock solution B: Weigh 0.100 0 g of praseodymium oxide (4.2.5) in a 100 mL beaker; use a small amount of water (4.2.1) to moisten; add 10 mL of hydrochloric acid solution (4.2.20); heat and dissolve until clear; cool and transfer to a 200 mL volumetric flask; use hydrochloric acid solution (4.2.21) to dilute to the mark; mix well. This solution contains 0.5 mg of praseodymium oxide in 1 mL. 4.2.24 Standard stock solution C~O: Weigh each single rare earth oxide according to Table 3 into a 200 mL beaker; use water (4.2.1) to moisten; add 10 mL of nitric acid (4.2.18) and 5 ~ 10 drops of hydrogen peroxide (4.2.19); heat and decompose until clear (if not clear, repeat the operation); then, add 5 mL of hydrochloric acid solution (4.2.20) and evaporate until nearly dry; repeat once to convert nitrate into chloride; cool and transfer to a 250 mL volumetric flask; use hydrochloric acid solution (4.2.21) to dilute to the mark; mix well. The content of each single rare earth oxide contained in 1 mL of this solution is shown in Table 4. 4.5.3 Preparation of test material sample 4.5.3.1 Mixed rare earth oxide of ion-absorption rare earth ore: Place the test material (4.5.1) in a 100 mL beaker; add 5 mL of hydrochloric acid (4.2.20) [add 5 mL of nitric acid (4.2.18) for samples with high cerium content]; add 0.5 mL of hydrogen peroxide (4.2.19); heat to decompose and evaporate to near dryness. After cooling to room temperature, add 5.00 mL of scandium internal standard solution (4.2.25) or vanadium internal standard solution (4.2.26); dissolve to clear; mix well. 4.5.3.2 Mixed rare earth oxalate of ion-absorption rare earth ore: Calcine the test material (4.5.1) at 950 ℃ for 1 h; then cool it to room temperature in a desiccator. Follow the subsequent steps as in 4.5.3.1. 4.5.3.3 Mixed rare earth carbonate of ion-absorption rare earth ore: Place the test material (4.5.1) in a 100 mL beaker; add 20 mL of water (4.2.1), 20 mL of hydrochloric acid (4.2.20) and 1 mL of hydrogen peroxide (4.2.19); heat to decompose until clear; after cooling, transfer it to a 200 mL volumetric flask; use water (4.2.1) to dilute to the mark; mix well. Transfer 0.10 g of the test solution equivalent to the mass of rare earth oxide into a 100 mL beaker; proceed with the subsequent steps according to 4.5.3.1. 4.5.3.4 Mixed rare earth chloride feed solution of ion-absorption rare earth ore: Transfer the test solution (4.5.1) into a 50 mL volumetric flask; use water (4.2.1) to dilute to the mark; mix well. Transfer 0.10 g of the feed solution (4.4.4) equivalent to the mass of rare earth oxide into a 100 mL beaker; proceed with the subsequent steps according to 4.5.3.1. 4.5.3.5 Take 0.30 mL of the solution (see 4.5.3.1 ~ 4.5.3.4); drop it evenly on the filter paper (4.2.27) spread on the glass plate; leave it for 20 min; dry it under an infrared lamp before determination. 4.5.4 Preparation of series standard samples According to Table 6, respectively transfer the standard stock solution into 12 100 mL beakers; evaporate until almost dry; cool to room temperature; add 5.0 mL of scandium internal standard solution (4.2.25) or vanadium internal standard solution (4.2.26); dissolve to clear; mix well. Prepare standard samples according to the steps in 4.5.3.5. The distribution values of the series standard samples are shown in Table 7. and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of yttrium oxide in 1 mL. 5.2.21 Lanthanum oxide standard stock solution: Weigh 0.500 0 g of lanthanum oxide (5.2.3) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of lanthanum oxide in 1 mL. 5.2.22 Cerium oxide standard stock solution: Weigh 0.200 0 g of cerium oxide (5.2.4) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of nitric acid (5.2.18) and 1 mL of hydrogen peroxide (5.2.19); decompose at low temperature until clear (if not clear, repeat the operation); cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 2.00 mg of cerium oxide in 1 mL. 5.2.23 Praseodymium oxide standard stock solution: Weigh 0.500 0 g of praseodymium oxide (5.2.5) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of praseodymium oxide in 1 mL. 5.2.24 Neodymium oxide standard stock solution: Weigh 0.500 0 g of neodymium oxide (5.2.6) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of neodymium oxide in 1 mL. 5.2.25 Samarium oxide standard stock solution: Weigh 0.500 0 g of samarium oxide (5.2.7) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of samarium oxide in 1 mL. 5.2.26 Europium oxide standard stock solution: Weigh 0.100 0 g of europium oxide (5.2.8) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of europium oxide in 1 mL. 5.2.27 Gadolinium oxide standard stock solution: Weigh 0.500 0 g of gadolinium oxide (5.2.9) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of gadolinium oxide in 1 mL. 5.2.28 Terbium oxide standard stock solution: Weigh 0.100 0 g of terbium oxide (5.2.10) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of terbium oxide in 1 mL. 5.2.29 Dysprosium oxide standard stock solution: Weigh 0.300 0 g of dysprosium oxide (5.2.11) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 3.00 mg of dysprosium oxide in 1 mL. 5.2.30 Holmium oxide standard stock solution: Weigh 0.100 0 g of holmium oxide (5.2.12) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of holmium oxide in 1 mL. 5.2.31 Erbium oxide standard stock solution: Weigh 0.500 0 g of erbium oxide (5.2.13) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of erbium oxide in 1 mL. 5.2.32 Thulium oxide standard stock solution: Weigh 0.100 0 g of thulium oxide (5.2.14) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of thulium oxide in 1 mL. 5.2.33 Ytterbium oxide standard stock solution: Weigh 0.500 0 g of ytterbium oxide (5.2.15) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 5.00 mg of ytterbium oxide in 1 mL. 5.2.34 Lutetium oxide standard stock solution: Weigh 0.100 0 g of lutetium oxide (5.2.16) into a 100 mL beaker; use water (5.2.1) to moisten; add 5 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear; cool and transfer to a 100 mL volumetric flask; use water (5.2.1) to dilute to the mark; mix well. This solution contains 1.00 mg of lutetium oxide in 1 mL. 5.2.35 Standard stock solutions I ~ VIII: According to Table 11, weigh each single rare earth oxide (see 5.2.2 ~ 5.2.16) into a 200 mL beaker; use water (5.2.1) to moisten; add 10 mL of hydrochloric acid (5.2.17) and 1 mL of hydrogen peroxide (5.2.19); heat and decompose until clear (if not clear, repeat the operation); cool and transfer to a 200 mL ......
 
Source: Above contents are excerpted from the PDF -- translated/reviewed by: www.chinesestandard.net / Wayne Zheng et al.