GB/T 4698.26-2024Methods for chemical analysis of titanium sponge, titanium and titanium alloys—Part 26: Determination of tantalum and tungsten content—Inductively coupled plasma atomic emission spectrometry (English PDF)

Foreword

This document is in accordance with the provisions of GB/T 1.1-2020 "Guidelines for standardization work Part 1: Structure and drafting rules for standardization documents" Drafting.

This document is part 26 of GB/T 4698 "Chemical analysis methods for titanium sponge, titanium and titanium alloys". GB/T 4698 has been published. The following parts.

— Part 1: Determination of copper content - Flame atomic absorption spectrometry;

— Determination of iron content (GB/T 4698.2);

— Part 3: Determination of silicon content - Molybdenum blue spectrophotometric method;

— Part 4: Determination of manganese content - Periodate spectrophotometry and inductively coupled plasma atomic emission spectrometry;

— Part 5: Determination of molybdenum content - Thiocyanate spectrophotometry and inductively coupled plasma atomic emission spectrometry;

— Part 6: Determination of boron content - Methylene blue spectrophotometric method and inductively coupled plasma atomic emission spectrometric method;

— Determination of oxygen and nitrogen content (GB/T 4698.7);

— Part 8: Determination of aluminum content - Alkali separation-EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry;

— Part 9: Determination of tin content - Potassium iodate titration and inductively coupled plasma atomic emission spectrometry;

— Part 10.Determination of chromium content by ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry (containing vanadium);

— Determination of chromium content (excluding vanadium) by titration with ammonium ferrous sulfate (GB/T 4698.11);

— Part 12.Determination of vanadium content by ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry;

— Part 13.Determination of zirconium content - EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry;

— Determination of carbon content (GB/T 4698.14);

— Determination of hydrogen content (GB/T 4698.15);

— Part 17.Determination of magnesium content - Flame atomic absorption spectrometry;

— Part 18.Determination of tin content - Flame atomic absorption spectrometry;

— Part 19.Determination of molybdenum content - Thiocyanate differential photometry;

— Part 21.Determination of manganese, chromium, nickel, aluminium, molybdenum, tin, vanadium, yttrium, copper and zirconium content - Atomic emission spectrometry;

— Part 22.Determination of niobium content - 5-Br-PADAP spectrophotometry and inductively coupled plasma atomic emission spectrometry;

— Part 23.Determination of palladium content - Stannous chloride-potassium iodide spectrophotometric method and inductively coupled plasma atomic emission spectrometric method;

— Part 24.Determination of nickel content - Dimethylglyoxime spectrophotometric method and inductively coupled plasma atomic emission spectrometric method;

— Part 25.Determination of chlorine content - Silver chloride spectrophotometric method;

— Part 26.Determination of tantalum and tungsten content - Inductively coupled plasma atomic emission spectrometry;

— Part 27.Determination of neodymium content - Inductively coupled plasma atomic emission spectrometry;

— Part 28.Determination of ruthenium content - Inductively coupled plasma atomic emission spectrometry;

— Part 29.Determination of aluminum, carbon, chromium, copper, iron, manganese, molybdenum, nickel, silicon, tin, vanadium and zirconium content - Photoelectric direct reading spectrometry.

Please note that some of the contents of this document may involve patents. The issuing organization of this document does not assume the responsibility for identifying patents.

This document is proposed by China Nonferrous Metals Industry Association.

This document is under the jurisdiction of the National Technical Committee on Standardization of Nonferrous Metals (SAC/TC243).

This document was drafted by: Baoji Titanium Co., Ltd., Baoti Group Co., Ltd., Xi'an Han Tang Analysis and Testing Co., Ltd., and National Standard (Beijing) Inspection and Certification Co., Ltd., Pangang Group Research Institute Co., Ltd., Chengde Tianda Vanadium Industry Co., Ltd., National Nuclear Zirconium and Hafnium Physical and Chemical Testing Co., Ltd.

Co., Ltd., Xinjiang Xiangrun New Material Technology Co., Ltd., and Shaanxi Yichuang Titanium Zirconium Testing Co., Ltd.

The main drafters of this document are: Li Jian, Li Zhenqian, Lu Fan, Li Xiaolong, Liu Leilei, Yue Xu, Bai Huanhuan, Zhang Tianguang, Luo Feng, Zhang Xiaoyan, Liu Jiayu, Cheng Yong, Xie Xiaoxue, Jiang Mingyue, Liu Liwei, Li Ting, and Wang Qiang.

Introduction

Titanium alloys have the characteristics of high specific strength, good corrosion resistance, heat resistance, low temperature resistance, etc., and are widely used in aviation, aerospace, nuclear energy, weapons and equipment, and marine applications.

Inductively coupled plasma atomic emission spectrometry (ICP-AES) is a method for the analysis of the molecular weight of a substance in a given volume, with high sensitivity, good precision, wide linear range, and It can perform multiple element analyses simultaneously and has high detection efficiency, and has been widely used in the determination of element content in titanium and titanium alloys.

GB/T 4698 aims to establish the chemical analysis methods for titanium sponge, titanium and titanium alloys and consists of the following parts.

— Part 1: Determination of copper content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of copper content.

— Part 2: Determination of iron content. The purpose is to establish a method for the determination of iron content.

— Part 3: Determination of silicon content - Molybdenum blue spectrophotometric method. The purpose is to establish a method for the determination of silicon content.

— Part 4: Determination of manganese content - Periodate spectrophotometry and inductively coupled plasma atomic emission spectrometry.

To establish a method for the determination of manganese content.

— Part 5: Determination of molybdenum content by thiocyanate spectrophotometry and inductively coupled plasma atomic emission spectrometry.

To establish a method for the determination of molybdenum content.

— Part 6: Determination of boron content Methylene blue spectrophotometry and inductively coupled plasma atomic emission spectrometry.

To establish a method for determining boron content.

— Part 7: Determination of oxygen and nitrogen content. The purpose is to establish the determination method of oxygen and nitrogen content.

— Part 8: Determination of aluminum content - Alkali separation-EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry.

The purpose is to establish a method for determining aluminum content.

— Part 9: Determination of tin content Potassium iodate titration and inductively coupled plasma atomic emission spectrometry. The purpose is to establish Method for determination of tin content.

— Part 10.Determination of chromium content - Ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry (containing vanadium).

The purpose is to establish a method for determining chromium content.

— Part 11.Determination of chromium content (excluding vanadium) by titration with ammonium ferrous sulfate. The purpose is to establish a method for the determination of chromium content.

— Part 12.Determination of vanadium content by ammonium ferrous sulfate titration and inductively coupled plasma atomic emission spectrometry.

Establish a method for the determination of vanadium content.

— Part 13.Determination of zirconium content EDTA complexometric titration and inductively coupled plasma atomic emission spectrometry.

To establish a method for the determination of zirconium content.

— Part 14.Determination of carbon content. The purpose is to establish a method for the determination of carbon content.

— Part 15.Determination of hydrogen content. The purpose is to establish a method for the determination of hydrogen content.

— Part 17.Determination of magnesium content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of magnesium content.

— Part 18.Determination of tin content - Flame atomic absorption spectrometry. The purpose is to establish a method for the determination of tin content.

— Part 19.Determination of molybdenum content - Thiocyanate differential photometry. The purpose is to establish a method for the determination of molybdenum content.

— Part 21.Determination of the amount of manganese, chromium, nickel, aluminum, molybdenum, tin, vanadium, yttrium, copper and zirconium by atomic emission spectrometry.

Method for determination of gold element.

— Part 22.Determination of niobium content by 5-Br-PADAP spectrophotometry and inductively coupled plasma atomic emission spectrometry.

The purpose of this study is to establish a method for determining niobium content.

— Part 23.Determination of palladium content - Stannous chloride-potassium iodide spectrophotometric method and inductively coupled plasma atomic emission spectrometric method.

The purpose is to establish a method for the determination of palladium content.

— Part 24.Determination of nickel content - Dimethylglyoxime spectrophotometry and inductively coupled plasma atomic emission spectrometry.

To establish a method for the determination of nickel content.

— Part 25.Determination of chlorine content - Silver chloride spectrophotometric method. The purpose is to establish a method for the determination of chlorine content.

— Part 26.Determination of tantalum and tungsten content - Inductively coupled plasma atomic emission spectrometry. The purpose is to establish the content of tantalum and tungsten Method for measuring quantity.

— Part 27.Determination of neodymium content - Inductively coupled plasma atomic emission spectrometry. The purpose is to establish the determination of neodymium content method.

— Part 28.Determination of ruthenium content Inductively coupled plasma atomic emission spectrometry. The purpose is to establish the determination of ruthenium content method.

— Part 29.Determination of aluminum, carbon, chromium, copper, iron, manganese, molybdenum, nickel, silicon, tin, vanadium and zirconium content by direct reading spectrometry.

To establish the method for determining the content of alloying and impurity elements.

This document improves the production industry chain of titanium and titanium alloys, and has great significance for improving the quality of titanium and titanium alloy products, expanding their application areas, and opening up product markets.

The field is of great significance.

Chemical analysis methods for titanium sponge, titanium and titanium alloys Part 26.Determination of tantalum and tungsten content Inductively coupled plasma atomic emission spectrometry

1 Scope

This document describes the method for the determination of tantalum and tungsten content in titanium sponge, titanium and titanium alloys.

This document is applicable to the determination of tantalum and tungsten content in titanium sponge, titanium, and titanium alloys. Determination range. 0.005%~2.50%.

2 Normative references

GB/T 6682

GB/T 8170

GB/T 17433

3 Terms and Definitions

The terms and definitions defined in GB/T 17433 apply to this document.

4 Principles

The sample was dissolved in nitric acid and hydrofluoric acid and determined by inductively coupled plasma atomic emission spectrometry at the selected wavelengths of tantalum and tungsten.

The emission intensity is measured. The mass concentration of each element is calculated using the working curve method and the results are expressed as mass fraction.

5 Reagents or materials

Unless otherwise stated, only reagents of confirmed high-grade purity were used in the analyses.

5.1 Water, GB/T 6682, Grade 2.

5.2 Hydrofluoric acid (rho = 1.13 g/mL).

5.3 Nitric acid (rho=1.42 g/mL).

5.4 Titanium metal (mass fraction greater than 99.99%, and mass fraction of tantalum and tungsten not greater than 0.001%).

5.5 Argon (volume fraction not less than 99.99%).

5.6 Tantalum standard storage solution. Weigh 1.0000g of metallic tantalum (wTa>=99.95%) into a 100mL polytetrafluoroethylene beaker and add 10mL nitric acid (5.3), then add 5mL hydrofluoric acid (5.2) in portions, cover with a polytetrafluoroethylene watch glass, heat at low temperature to dissolve, cool, and transfer In a 1000mL plastic volumetric flask, add 90mL nitric acid (5.3) and 15mL hydrofluoric acid (5.2), dilute to the mark with water, and mix well.

1 mL contains 1.0 mg of tantalum.