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GB/T 15076.5-2017 English PDF

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GB/T 15076.5-2017: Methods for chemical analysis of tantalum and niobium -- Part 5: Determination of molybdenum and tungsten contents -- Inductively coupled plasma atomic emission spectrometry
Status: Valid

GB/T 15076.5: Evolution and historical versions

Standard IDContents [version]USDSTEP2[PDF] delivered inStandard Title (Description)StatusPDF
GB/T 15076.5-2017English119 Add to Cart 3 days [Need to translate] Methods for chemical analysis of tantalum and niobium -- Part 5: Determination of molybdenum and tungsten contents -- Inductively coupled plasma atomic emission spectrometry Valid GB/T 15076.5-2017
GB/T 15076.5-1994English239 Add to Cart 3 days [Need to translate] Methods for chemical analysis of tantalum and niobium. Determination of molybdenum and tungsten contents Obsolete GB/T 15076.5-1994

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Basic data

Standard ID GB/T 15076.5-2017 (GB/T15076.5-2017)
Description (Translated English) Methods for chemical analysis of tantalum and niobium -- Part 5: Determination of molybdenum and tungsten contents -- Inductively coupled plasma atomic emission spectrometry
Sector / Industry National Standard (Recommended)
Classification of Chinese Standard H14
Classification of International Standard 77.120.99
Word Count Estimation 6,633
Date of Issue 2017-10-14
Date of Implementation 2018-05-01
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 15076.5-2017: Methods for chemical analysis of tantalum and niobium -- Part 5: Determination of molybdenum and tungsten contents -- Inductively coupled plasma atomic emission spectrometry



---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.
Methods for chemical analysis of tantalum and niobium - Part 5. Determination of molybdenum and tungsten contents - Inductively coupled plasma atomic emission spectrometry ICS 77.120.99 H14 National Standards of People's Republic of China Replacing GB/T 15076.5-1994 Tantalum and niobium chemical analysis methods Part 5. Determination of molybdenum content and tungsten content Inductively coupled plasma atomic emission spectrometry Methods for chemical analysis of dental Umnniobium- Part 5.Determinationofmolybdenumandtungstencontents- 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 15076 "tantalum and niobium chemical analysis method" is divided into 16 parts. --- Part 1. Determination of tantalum in niobium content Inductively coupled plasma atomic emission spectrometry; --- Part 2. Determination of niobium in tantalum, extraction, chromatography - DSPCF spectrophotometry and chromatography - gravimetric method; --- Part 3. Determination of copper content CTC extraction and separation of sodium diethyl dithiocarbamate spectrophotometry; --- Part 4. Determination of iron content 1,10-phenanthroline spectrophotometry; --- Part 5. Determination of molybdenum content and tungsten content Inductively coupled plasma atomic emission spectrometry; --- Part 6. Determination of silicon content in tantalum anion exchange separation molybdenum silicate blue spectrophotometry and 4-methyl-pentanone - [2] extraction separation Silicon molybdenum blue spectrophotometry; --- Part 7. Determination of the amount of phosphorus in niobium 4 - methyl - pentanone - [2] extraction and separation of phosphomolybdate blue spectrophotometry; --- Part 8. Determination of carbon and sulfur content High-frequency combustion infrared absorption method; - Part 9. Determination of iron, chromium, nickel, manganese, titanium, aluminum, copper, tin, lead and zirconium in tantalum by direct current arc atomic emission spectrometry; --- Part 10. Determination of iron, nickel, chromium, titanium, zirconium, aluminum and manganese in niobium; DC arc carrier fractionation atomic emission spectrometry; --- Part 11. Determination of arsenic, antimony, lead, tin and bismuth in niobium; DC arc carrier fractionation atomic emission spectrometry; --- Part 12. Determination of phosphorus in tantalum; Ethyl acetate extraction; Phosphomolybdate blue spectrophotometry; --- Part 13. Determination of nitrogen; inert gas melting heat conduction method; --- Part 14. Determination of oxygen; inert gas melting infrared absorption method; --- Part 15. Determination of hydrogen content inert gas melting heat conduction method; --- Part 16. Determination of sodium and potassium content by flame atomic absorption spectrometry. This section GB/T 15076 Part 5. This section drafted in accordance with GB/T 1.1-2009 given rules. This Part replaces GB/T 15076.5-1994 "Determination of molybdenum content and tungsten content of tantalum and niobium chemical analysis methods." This section compared with GB/T 15076.5-1994, the main technical content changes are as follows. --- Change the determination method, by spectrophotometry to inductively coupled plasma atomic emission spectrometry; --- Determination range from 0.0003% ~ 0.10% modified to 0.0005% ~ 3.00%; --- Complement the precision and test report terms. This part is proposed by China Nonferrous Metal Industry Association. This part of the National Non-ferrous Metal Standardization Technical Committee (SAC/TC243) centralized. This part of the drafting unit.Ningxia Dongfang Tantalum Industry Co., Ltd., Northwest Rare Metal Materials Research Institute, Western Metal Materials Co., Ltd. the company. The main drafters of this section. Hao Hongmei, Li Xun, Sun Hongtao, Hao Wenting, Yang Junhong, Voltsun wins, Chen Rui, Zhang Jing. This part replaces the standards previously issued as. --- GB/T 15076.5-1994. Tantalum and niobium chemical analysis methods Part 5. Determination of molybdenum content and tungsten content Inductively coupled plasma atomic emission spectrometry

1 Scope

GB/T 15076 provisions of this part of tantalum, niobium molybdenum content and tungsten content of the determination. This section applies to tantalum, niobium and its hydroxides, oxides, carbides and potassium fluotitanate potassium molybdenum and tungsten content determination. Measurement range. 0.0005% ~ 3.00%.

2 method summary

The sample is dissolved with nitric acid and hydrofluoric acid. In a dilute acid medium, argon plasma is used as the ionization source, and the inductively coupled plasma Atomic Emission Spectrometry.

3 Reagents and materials

Unless otherwise indicated, the reagents used in this section are in line with national standards or industry standards excellent grade pure reagent, the water used for two water. 3.1 Nitric acid (p = 1.42 g/mL). Hydrofluoric acid (ρ = 1.14 g/mL). 3.3 sodium hydroxide solution (200g/L). 3.4 tantalum matrix. WTa ≥ 99.99%, wW ≤ 0.00001%, wMo ≤ 0.00001%. 3.5 niobium matrix .wNb≥99.99%, wW≤0.00001%, wMo≤0.00001%. 3.6 Tungsten standard stock solution Weigh 1.2611g of tungsten oxide pre-dried at 105 ℃ for 1h and placed in a desiccator to cool to room temperature (wWO3 ≥ 99.99%) in 250mL Teflon beaker, add 20mL sodium hydroxide solution (3.3), heated to dissolve, cooled, Into a 1000mL volumetric flask, diluted with water to the mark, mix well. 1 mL of this solution contains 1 mg of tungsten. Store in polyethylene volumetric flask. 3.7 Tungsten standard solution Pipette 10.00mL tungsten standard stock solution (3.6) In a 100mL volumetric flask, add 1.8mL sodium hydroxide solution Liquid (3.3), diluted with water to the mark, mix well. 1 mL of this solution contains 100 μg of tungsten. Store in polyethylene volumetric flask. 3.8 Molybdenum standard stock solution Weigh 1.8403g ammonium molybdate [w (NH4) Mo7O24 · 4H2O ≥ 99.99%] in a 250mL beaker with a small amount of water Dissolved, into 1000mL volumetric flask, diluted with water to the mark, mix well. 1 mL of this solution contains 1 mg of molybdenum. 3.9 Molybdenum standard solution Pipette 10.00mL molybdenum standard stock solution (3.8) in 100mL volumetric flask, diluted with water to the mark, and mix. This solution 1 mL contains 100 μg molybdenum. 3.10 Argon, the volume fraction of not less than 99.99%.

4 instruments

4.1 Inductively Coupled Plasma Atomic Emission Spectrometer with Hydrofluoric Acid Injection System, Resolution < 0.006 nm (at.200 nm). 4.2 Recommended elements of the line of choice in Table 1.

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