GB/T 6150.15-2023Methods for chemical analysis of tungsten concentrates—Part 15: Determination of bismuth content—Hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry (English PDF)

Foreword

This document complies with the provisions of GB/T 1.1-2020 "Standardization Work Guidelines Part 1: Structure and Drafting Rules of Standardization Documents" Drafting.

This document is Part 15 of GB/T 6150 "Chemical Analysis Methods for Tungsten Concentrates". GB/T 6150 has released the following parts.

---Part 1: Determination of tungsten trioxide content by ammonium tungstate ignition gravimetric method;

---Part 2: Determination of tin content by potassium iodate titration and inductively coupled plasma atomic emission spectrometry;

---Part 3: Determination of phosphorus content by phosphomolybdenum yellow spectrophotometry and inductively coupled plasma atomic emission spectrometry;

---Part 4: Determination of sulfur content by high-frequency induction infrared absorption method and combustion-iodometric method;

---Determination of calcium content by EDTA volumetric method and atomic absorption spectrometry;

---Part 6: Gravimetric method for determination of wet water content;

---Determination of tantalum and niobium content by plasma emission spectrometry and spectrophotometry;

---Part 8: Determination of molybdenum content by thiocyanate spectrophotometry;

---Determination of copper content by flame atomic absorption spectrometry;

---Part 10: Determination of lead content by hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry;

---Determination of zinc content by flame atomic absorption spectrometry;

---Part 12: Determination of silica content by silicon-molybdenum blue spectrophotometry and gravimetric method;

---Part 13: Determination of arsenic content by atomic fluorescence spectrometry and DDTC-Ag spectrophotometry;

---Determination of manganese content by ferrous ammonium sulfate volumetric method and flame atomic absorption spectrometry;

---Part 15: Determination of bismuth content by hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry;

---Determination of iron content by sulfosalicylic acid spectrophotometry;

---Part 17: Determination of antimony content by atomic fluorescence spectrometry;

---Part 18: Determination of barium content by inductively coupled plasma atomic emission spectrometry.

This document replaces GB/T 6150.15-2008 "Method for chemical analysis of tungsten concentrate - Determination of bismuth content by flame atomic absorption spectrometry" and is consistent with Compared with GB/T 6150.15-2008, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) The measurement range of the method has been changed (see Chapter 1);

b) Added "Terms and Definitions" (see Chapter 3);

c) Added method 1.hydride generation atomic fluorescence spectrometry (see Chapter 4);

d) Changed the sample weight for flame atomic absorption method (see 5.5.1, 6.1 of the 2008 edition);

e) "Precision" has been changed (see 4.7, 5.7, Chapter 8 of the 2008 edition);

f) Added "Test Report" (see Chapter 6);

g) "Quality Assurance and Control" has been deleted (see Chapter 9 of the 2008 edition).

Introduction

Tungsten concentrate is an important strategic resource. Tungsten and tungsten alloys produced from tungsten concentrate as an important industrial raw material have high melting point, high specific Due to its heavy weight and high hardness, it is widely used in mechanical processing, metallurgy, mining, electronic telecommunications, construction industry, weapons industry, aerospace and other fields.

GB/T 6150 aims to establish through experimental research a complete set of chemical compositions that are practical and adaptable to the production and trade needs of tungsten concentrate products.

Methodological standards for analysis. Limited by the length of the document, usage requirements, scope of application, and technical independence between each analysis method, etc. Therefore, GB/T 6150 is planned to consist of 20 parts.

---Part 1: Determination of tungsten trioxide content. Ammonium tungstate ignition gravimetric method. The purpose is to establish the determination of tungsten trioxide content method.

---Part 2: Determination of tin content by potassium iodate titration and inductively coupled plasma atomic emission spectrometry. The purpose is to ensure Determination method of tin content.

---Part 3: Determination of phosphorus content by phosphomolybdenum yellow spectrophotometry and inductively coupled plasma atomic emission spectrometry. The purpose is To establish a method for determining phosphorus content.

---Part 4: Determination of sulfur content by high-frequency induction infrared absorption method and combustion-iodometric method. The purpose is to establish the determination of sulfur content method.

---Part 5: Determination of calcium content by EDTA volumetric method and flame atomic absorption spectrometry. The purpose is to establish the measurement of calcium content Determine the method.

---Part 6: Gravimetric method for determination of wet water content. The purpose is to establish a method for determining wet water content.

---Part 7: Determination of tantalum and niobium content by plasma emission spectrometry and spectrophotometry. The purpose is to establish that tantalum and niobium contain Quantity measurement method.

---Part 8: Determination of molybdenum content by thiocyanate spectrophotometry. The purpose is to establish a method for determining molybdenum content.

---Part 9: Determination of copper content by flame atomic absorption spectrometry. The purpose is to establish a method for measuring copper content.

---Part 10: Determination of lead content by hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry. The purpose is to ensure Method for determination of vertical lead content.

---Part 11: Determination of zinc content by flame atomic absorption spectrometry. The purpose is to establish a method for determining zinc content.

---Part 12: Determination of silica content by silicon molybdenum blue spectrophotometry and gravimetric method. The purpose is to establish the silica content method of determination.

---Part 13: Determination of arsenic content by atomic fluorescence spectrometry and DDTC-Ag spectrophotometry. The aim was to establish the arsenic content method of determination.

---Part 14: Determination of manganese content by ferrous ammonium sulfate volumetric method and flame atomic absorption spectrometry. The aim is to establish the manganese content method of determination.

---Part 15: Determination of bismuth content by hydride generation atomic fluorescence spectrometry and flame atomic absorption spectrometry. The purpose is to ensure Method for determination of bismuth content.

---Part 16: Determination of iron content by sulfosalicylic acid spectrophotometry. The purpose is to establish a method for determining iron content.

---Part 17: Determination of antimony content by atomic fluorescence spectrometry. The purpose is to establish a method for determining antimony content.

---Part 18: Determination of barium content by inductively coupled plasma atomic emission spectrometry. The purpose is to establish the determination of barium content method.

---Part 19: Determination of fluorine content by ion selective electrode method. The purpose is to establish a method for measuring fluorine content.

---Part 20: Determination of mercury content by spectrophotometry. The purpose is to establish a method for measuring mercury content.

It has been more than ten years since GB/T 6150.15-2008 was released and implemented. During this period, its applicable product standards have been revised once in 2015.

(YS/T 231-2015), various technical indicators have undergone new changes, and upstream and downstream customers in the tungsten industry have also had new requirements for product testing.

In order to meet the demand, analysis and detection technology has also developed and improved, and the country has further strict requirements for environmental protection in various industries. In view of this, it is indeed necessary

GB/T 6150.15-2008 should be revised to ensure that the standard adapts to industry changes and market needs.

By improving and changing the analytical methods in existing standards, replacing them with new detection instruments or expanding the detection range, it is important to maintain The main ways to analyze the adaptability of method standards. This revision adds the hydride atomic fluorescence spectrometry method, which makes the detection limit of the method lower and can Increase the applicability of this document, thereby increasing the standard adoption rate and better serving and promoting production, trade and application needs.

1 Scope

This document specifies the method for determination of bismuth content in tungsten concentrate.

This document is applicable to the determination of bismuth content in tungsten concentrate, including hydride generation atomic fluorescence spectrometry (Method 1) and flame atomic absorption Spectroscopy (Method 2). Method 1 measurement range (mass fraction). 0.0010%~0.30%, method 2 measurement range (mass fraction).

0.050%~0.50%. When the measurement ranges overlap, Method 2 shall be used as the arbitration method.

2 Normative reference documents

The contents of the following documents constitute essential provisions of this document through normative references in the text. Among them, the dated quotations For undated referenced documents, only the version corresponding to that date applies to this document; for undated referenced documents, the latest version (including all amendments) applies to this document.

GB/T 6682 Specifications and test methods for water used in analytical laboratories

GB/T 8170 Numerical rounding rules and representation and determination of limit values

GB/T 17433 Basic terminology for chemical analysis of metallurgical products

3 Terms and definitions

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

4 Method 1.Hydride generation atomic fluorescence spectrometry