GB/T 6150.18-2023Methods for chemical analysis of tungsten concentrates—Part 18: Determination of barium 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 18 of GB/T 6150 "Methods for Chemical Analysis of Tungsten Concentrates". GB/T 6150 has issued the following parts.

--- Determination of the amount of tungsten trioxide ammonium tungstate ignition gravimetric method;

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

--- Determination of phosphorus content Phosphomolybdenum yellow spectrophotometry;

---Determination of sulfur content High-frequency infrared absorption method;

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

--- Gravimetric method for the determination of wet water storage;

--- Determination of the amount of tantalum and niobium plasma emission spectrometry and spectrophotometry;

--- Determination of molybdenum content thiocyanate spectrophotometric method;

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

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

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

--- Determination of the amount of silicon dioxide silicon molybdenum blue spectrophotometry and gravimetric method;

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

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

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

--- Determination of iron content sulfosalicylic acid spectrophotometric method;

--- Part 17. Determination of antimony content atomic fluorescence spectrometry;

--- Part 18. Determination of barium content Inductively coupled plasma atomic emission spectrometry.

Introduction

Tungsten concentrate is an important strategic resource. Tungsten and tungsten alloys produced with it as an important industrial raw material have high melting point, high specific With the characteristics of heavy and high hardness, it is widely used in mechanical processing, metallurgy, mining, electronic telecommunications, construction industry, weapon industry, aerospace and other fields.

GB/T 6150 aims to establish a complete, feasible and suitable for the production and trade needs of tungsten concentrate products through experimental research.

Methodological standards for sub-analysis. GB/T 6150 is proposed to consist of 18 parts.

--- Part 1. Determination of tungsten trioxide content Ammonium tungstate ignition gravimetric method. The purpose is to establish a gravimetric method for the determination of three Method for tungsten oxide content.

--- Part 2. Determination of tin content Potassium iodate titration and inductively coupled plasma atomic emission spectrometry. purpose is to build A method for the determination of tin content in tungsten concentrate by vertical titration and inductively coupled plasma atomic emission spectrometry.

--- Part 3. Determination of phosphorus content Phosphomolybdenum yellow spectrophotometric method. The purpose is to establish a spectrophotometric method for the determination of phosphorus content in tungsten concentrate Quantitative method.

--- Part 4. Determination of sulfur content High frequency infrared absorption method. The purpose is to establish a high-frequency-infrared absorption method for the determination of sulfur in tungsten concentrate content method.

--- Part 5. Determination of calcium content EDTA volumetric method and flame atomic absorption spectrometry. The purpose is to establish the capacity method and the original Method for determining calcium content in tungsten concentrate by sub-absorption spectroscopy.

--- Part 6. Gravimetric method for the determination of wet storage water content. The purpose is to establish a gravimetric method for the determination of wet water content in tungsten concentrate method.

--- Part 7. Determination of tantalum and niobium content Plasma emission spectrometry and spectrophotometry. The purpose is to establish inductive coupling, etc.

A method for determining the content of tantalum and niobium in tungsten concentrate by plasma emission spectrometry and spectrophotometry.

--- Part 8. Determination of molybdenum content thiocyanate spectrophotometric method. The purpose is to establish a spectrophotometric method for the determination of molybdenum in tungsten concentrate content method.

--- Part 9. Determination of copper content flame atomic absorption spectrometry. The purpose is to establish flame atomic absorption spectrometry for the determination of tungsten Method for copper content in concentrates.

--- Part 10. Determination of lead content flame atomic absorption spectrometry. The purpose is to establish atomic fluorescence spectrometry and flame atomic Absorption spectroscopy is a method for determining the lead content in tungsten concentrate.

--- Part 11. Determination of zinc content flame atomic absorption spectrometry. The purpose is to establish flame atomic absorption spectrometry for the determination of tungsten Method for zinc content in concentrates.

--- Part 12. Determination of silica content Silicon molybdenum blue spectrophotometric and gravimetric method. The purpose is to establish spectrophotometric and Gravimetric method for determining the content of silica in tungsten concentrate.

--- Part 13. Determination of arsenic content atomic fluorescence spectrometry and DDTC-Ag spectrophotometry. The purpose is to establish atomic fluorescent A method for the determination of arsenic content in tungsten concentrate by optical spectroscopy and spectrophotometry.

--- Part 14. Determination of manganese content ferrous ammonium sulfate volumetric method and flame atomic absorption spectrometry. volumetric approach and flame atomic absorption spectrometry for the determination of manganese content in tungsten concentrates.

--- Part 15. Determination of bismuth content Flame atomic absorption spectrometry. The purpose is to establish flame atomic absorption spectrometry for the determination of tungsten Method for Bismuth Content in Concentrates.

--- Part 16. Determination of iron content sulfosalicylic acid spectrophotometric method. The purpose is to establish a spectrophotometric method for the determination of tungsten concentrate method of iron content.

--- Part 17. Determination of antimony content atomic fluorescence spectrometry. The purpose is to establish atomic fluorescence spectrometry for the determination of antimony in tungsten concentrate content method.

--- Part 18. Determination of barium content Inductively coupled plasma atomic emission spectrometry. The purpose is to create an inductively coupled plasma A method for the determination of barium content in tungsten concentrate by daughter atomic emission spectrometry.

Barium is a toxic and harmful element that is harmful to human health, and its content directly affects whether the tungsten slag produced by tungsten smelting is hazardous waste. object identification. In production, barium will form insoluble precipitates with tungsten, which will directly reduce the recovery rate of tungsten and greatly increase the production cost of the enterprise.

The formulation of this document can meet the market's demand for quality inspection of tungsten concentrates, and the establishment of new detection methods is conducive to a unified analysis method Carrying out product quality testing is conducive to the formation of a fair trading environment in the market.

1 Scope

This document specifies the method for the determination of barium content in tungsten concentrates.

This document is applicable to the determination of barium content in tungsten concentrate. Measuring range (mass fraction). 0.050%~5.00%.

2 Normative references

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

GB/T 6682 Analytical laboratory water specifications and test methods

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

GB/T 17433 Basic Terms for Chemical Analysis of Metallurgical Products

3 Terms and Definitions

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

4 Principles

The sample was melted with anhydrous sodium carbonate, sodium hydroxide, sodium peroxide and strontium chloride, filtered with water leaching, and the filter residue was dissolved with nitric acid and perchloric acid.

In the dilute nitric acid medium, the sample is brought into the plasma torch by argon (5.11), after gasification, ionization, excitation and emission of characteristic spectral lines, in a Within a certain concentration range, the intensity of the characteristic spectral line of the barium element is proportional to its concentration, and the concentration of the barium element is calculated according to the working curve method, and the mass fraction Indicates the measurement result.

5 Reagents and Materials

Unless otherwise stated, only reagents confirmed to be of analytical grade were used in the analysis.

5.1 Water, GB/T 6682, Class II.

5.2 Anhydrous sodium carbonate.

5.3 Sodium hydroxide.

5.4 Sodium peroxide.

5.5 Strontium chloride, superior grade.

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

5.7 Perchloric acid (rho=1.68g/mL).