GB/T 12690.18-2017 English PDF

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GB/T 12690.18-2017: Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 18: Determination of zirconium content
Status: Valid

GB/T 12690.18: Historical versions

Standard ID	USD	BUY PDF	Lead-Days	Standard Title (Description)	Status
GB/T 12690.18-2017	159	Add to Cart	3 days	Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 18: Determination of zirconium content	Valid
GB/T 12690.18-1990	199	Add to Cart	2 days	Rare-earth metals and their oxides--Determination of chlorine content--Mercury sulphoeyanie-iron nitrate spectrophotometric method	Obsolete

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Basic data

Standard ID: GB/T 12690.18-2017 (GB/T12690.18-2017)
Description (Translated English): Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 18: Determination of zirconium content
Sector / Industry: National Standard (Recommended)
Classification of Chinese Standard: H14
Classification of International Standard: 77.120.99
Word Count Estimation: 8,874
Date of Issue: 2017-10-14
Date of Implementation: 2018-05-01
Regulation (derived from): National Standard Announcement 2017 No. 26
Issuing agency(ies): General Administration of Quality Supervision, Inspection and Quarantine of the People's Republic of China, Standardization Administration of the People's Republic of China

GB/T 12690.18-2017: Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides -- Part 18: Determination of zirconium content

---This is a DRAFT version for illustration, not a final translation. Full copy of true-PDF in English version (including equations, symbols, images, flow-chart, tables, and figures etc.) will be manually/carefully translated upon your order.
Chemical analysis methods for non-rare earth impurity of rare earth metals and their oxides-Part 18. Determination of zirconium content ICS 77.120.99 H14 National Standards of People's Republic of China Rare earth metals and oxides Non - rare earth impurities chemistry Methods of analysis Part 18. Determination of zirconium content Chemicalanalysis methods for non-rareearthimpurity of eartharthmetals theiroxides-Part 18. Determination of zirconium content 2017-10-14 Published 2018-05-01 implementation General Administration of Quality Supervision, Inspection and Quarantine of People's Republic of China China National Standardization Administration released

Foreword

GB/T 12690 "rare earth metals and oxides non-rare earth impurities chemical analysis method" is divided into 18 parts. --- Part 1. Determination of carbon, sulfur content High-frequency - infrared absorption method; --- Part 2. Determination of ignition loss in rare earth oxides gravimetric method; --- Part 3. Determination of water content in rare earth oxides gravimetric method; --- Part 4. Determination of oxygen and nitrogen content Pulsed - infrared absorption and pulse - thermal conductivity method; --- Part 5. Determination of cobalt, manganese, lead, nickel, copper, zinc, aluminum, chromium, magnesium, cadmium, vanadium and iron content; --- Part 6. Determination of iron content potassium thiocyanate, 1,10-phenanthroline spectrophotometry; --- Part 7. Determination of silicon content molybdenum blue spectrophotometry; --- Part 8. Determination of sodium content; Flame atomic absorption spectrometry; --- Part 9. Determination of chlorine content silver nitrate turbidimetric method; --- Part 10. Determination of phosphorus content molybdenum blue spectrophotometry; --- Part 11. Determination of magnesium content by flame atomic absorption spectrometry; --- Part 12. Determination of thorium content; --- Part 13. Determination of molybdenum and tungsten content; --- Part 14. Determination of titanium content; --- Part 15. Determination of calcium content; --- Part 16. Determination of fluorine content ion selective electrode method; --- Part 17. Determination of niobium and tantalum in rare earth metals; --- Part 18. Determination of zirconium content. This section GB/T 12690 Part 18. This section drafted in accordance with GB/T 1.1-2009 given rules. This part of the National Rare Earth Standardization Technical Committee (SAC/TC229) and focal point. This part of the drafting unit. Beijing Nonferrous Metal Research Institute, China Nonferrous Metals Industry Standards Institute of Metrology, Baotou Rare Earth Research Hospital, Jiangyin Jiahua New Materials Co., Ltd., Ganzhou dawn Rare Earth New Materials Co., Ltd., Jiangxi Golden Century New Materials Co., Ltd. Division, Qigong Rare Earth Group Co., Ltd. The main drafters of this section. Bowen Lin, Liu Pengyu, Shao Rongzhen, Liu Bing, Zhou Kaihong, Zhao Jing, Li Jianting, Zhao Pinghong, Zhang Jian, Chen Yan, Xie Yali, Xie Baoping, Tian Ronghua, Wen Bin, Yao Nanhong, Liu Zhuying. Rare earth metals and oxides Non - rare earth impurities chemistry Methods of analysis Part 18. Determination of zirconium content

1 Scope

This part of GB/T 12690 specifies the determination of zirconium content of rare earth metals and their oxides. This section applies to the determination of zirconium in rare earth metals and oxides, including two methods, method 1 inductively coupled plasma Emission spectrometry, Method 2 Inductively coupled plasma mass spectrometry. Measurement range for Method 1 > 0.010% to 0.20%; Method 2 Determination Range .0.0005% ~ 0.010%. 2 Method 1 Inductively coupled plasma atomic emission spectrometry 2.1 method principle Sample with nitric acid, sulfuric acid dissolved in dilute acid medium, measured by inductively coupled plasma atomic emission spectrometry. Matrix matching method Correct the influence of matrix on the determination of elements. 2.2 Reagents and materials 2.2.1 Hydrogen peroxide (30%). 2.2.2 Nitric acid (1 1). 2.2.3 Sulfuric acid (1 1). 2.2.4 zirconium standard stock solution Accurately weigh 1.0000g metal zirconium [w (Zr) ≥99.9%] in a Teflon beaker, add 20mL Water, add 3mL hydrofluoric acid (ρ = 1.14g/mL), heat, and add a small amount of nitric acid (2.2.2) dropwise until completely dissolved. After boiling the solution, take Beaker, cooled to room temperature, transferred to 1000mL volumetric flask, diluted with nitric acid (1 19) to the mark, and mix. This solution contains 1mL 1 mg zirconium. 2.2.5 zirconium standard solution Pipette 10.00mL zirconium standard stock solution (2.2.4) in.200mL volumetric flask, add 10mL nitric acid (2.2.2), diluted with water to the mark, mix well. This solution 1 mL contains 50 μg zirconium. 2.2.6 Rare Earth Base Solution Weigh 1.0000g of single rare earth oxide [w (REO) ≥99.5% after burning at 950 ℃ for 1h, rare earth phase For purity ≥ 99.9%, w (Zr) < 0.001%], placed in 100mL beaker, add 20mL of nitric acid (2.2.2), low temperature heating until complete dissolution, Remove the cooling. Into a 100mL volumetric flask, diluted with water to the mark, mix well. 1 mL of this solution contains 10 mg of a single rare earth oxide. 2.2.7 Argon [φ (Ar) ≥99.99%]. 2.3 equipment Inductively Coupled Plasma Spectrometer with resolution < 0.006 nm (at.200 nm). 2.4 sample 2.4.1 Preparation of rare earth oxide sample at 105 ℃ drying 1h, placed in a desiccator, cooled to room temperature. 2.4.2 Preparation of rare earth metal sample. Remove the surface oxide layer, immediately after sampling, weighing. 2.5 Analysis steps 2.5.1 Sample Weigh 0.10g sample (2.4), accurate to 0.0001g. ......

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