GB/T 8152.11-2023Methods for chemical analysis of lead concentrates—Part 11: Determination of mercury content—Atomic fluorescence spectrometry and direct mercury determining with solid injection method (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 11 of GB/T 8152 "Methods for Chemical Analysis of Lead Concentrates". GB/T 8152 has released the following parts.

--- Part 1. Determination of lead content acid dissolution-EDTA titration method;

--- Part 2. Determination of lead content - lead sulfate precipitation - EDTA back titration method;

--- Part 3. Determination of the amount of aluminum oxide - Chromazurin S spectrophotometric method;

--- Part 4. Determination of zinc content EDTA titration method;

--- Part 5. Determination of the amount of arsenic atomic fluorescence spectrometry;

--- Part 6. Determination of bismuth content by polarography;

--- Part 7. Determination of copper content by flame atomic absorption spectrometry;

--- Part 8. Determination of bismuth content by dithiodiantipyrine methane spectrophotometry;

--- Part 9. Determination of magnesium oxide by flame atomic absorption spectrometry;

--- Part 10. Determination of silver and gold content lead precipitation or pyrolysis gold and flame atomic absorption spectrometry;

--- Part 11. Determination of mercury content atomic fluorescence spectrometry and direct solid injection method;

--- Part 12. Determination of the amount of cadmium flame atomic absorption spectrometry;

--- Part 13. Determination of the amount of thallium by inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry;

--- Part 14. Determination of silica content Molybdenum blue spectrophotometry;

--- Part 15. Determination of soluble lead content by flame atomic absorption spectrometry;

--- Part 16. Determination of calcium oxide content by flame atomic absorption spectrometry;

--- Part 17. Determination of aluminum, magnesium, iron, copper, zinc, cadmium, arsenic, antimony, bismuth, calcium content Inductively coupled plasma atomic emission light spectral method.

This document replaces GB/T 8152.11-2006 "Methods for Chemical Analysis of Lead Concentrates - Determination of Mercury by Atomic Fluorescence Spectrometry". and Compared with GB/T 8152.11-2006, except for structural adjustment and editorial changes, the main technical changes are as follows:

a) Changed the range, changing "measurement range. 0.0001%~0.50%" to "method 1 measurement range. 0.00010%~0.500%;

Method 2 Measuring range. 0.0000010%~0.0250%" (see Chapter 1, Chapter 1 of the 2006 edition);

b) Added the requirements for reagents and changed the requirements for water (see 4.2, Chapter 3 of the 2006 edition);

c) Increased sample drying conditions (see 4.4);

d) Changed the drawing of the working curve (see 4.5.5, 5.4.1 of the 2006 edition);

e) Added method 2 direct method of solid sampling (see Chapter 5).

Introduction

Lead concentrate is the main raw material for the production of metallic lead, lead alloys, lead compounds, etc. Lead is second only to copper, aluminum, and zinc in the consumption of non-ferrous metals in my country.

GB/T 8152 "Chemical Analysis Methods of Lead Concentrates" stipulates the chemical analysis methods for the content of each element in lead concentrates, aiming to meet the quality requirements of lead concentrates. Arbitration and inspection needs.

GB/T 8152 consists of 17 parts.

--- Part 1. Determination of lead content acid dissolution-EDTA titration method;

--- Part 2. Determination of lead content - lead sulfate precipitation - EDTA back titration method;

--- Part 3. Determination of the amount of aluminum oxide - Chromazurin S spectrophotometric method;

--- Part 4. Determination of zinc content EDTA titration method;

--- Part 5. Determination of the amount of arsenic atomic fluorescence spectrometry;

--- Part 6. Determination of bismuth content by polarography;

--- Part 7. Determination of copper content by flame atomic absorption spectrometry;

--- Part 8. Determination of bismuth content by dithiodiantipyrine methane spectrophotometry;

--- Part 9. Determination of magnesium oxide by flame atomic absorption spectrometry;

--- Part 10. Determination of silver and gold content lead precipitation or pyrolysis gold and flame atomic absorption spectrometry;

--- Part 11. Determination of mercury content atomic fluorescence spectrometry and direct solid injection method;

--- Part 12. Determination of the amount of cadmium flame atomic absorption spectrometry;

--- Part 13. Determination of the amount of thallium by inductively coupled plasma mass spectrometry and inductively coupled plasma-atomic emission spectrometry;

--- Part 14. Determination of silica content Molybdenum blue spectrophotometry;

--- Part 15. Determination of soluble lead content by flame atomic absorption spectrometry;

--- Part 16. Determination of calcium oxide content by flame atomic absorption spectrometry;

--- Part 17. Determination of aluminum, magnesium, iron, copper, zinc, cadmium, arsenic, antimony, bismuth, calcium content Inductively coupled plasma atomic emission light spectral method.

GB/T 8152.11-2006 Determination of mercury content in lead concentrate by atomic fluorescence spectrometer. This revision adds the direct Law. The sample decomposition and determination of the direct method of solid sampling are completed in a fully closed system, which overcomes the disadvantages of mercury element volatilization and loss.

At the end, this method has high sensitivity, low detection limit, short sample analysis time, high degree of automation, and reduces the use of corrosive reagents.

Advanced, more environmentally friendly detection technology. The newly added direct method of solid sample injection is a powerful supplement to atomic fluorescence spectrometry.

1 Scope

This document describes a method for the determination of mercury content in lead concentrates.

This document applies to the determination of mercury content in lead concentrate. Method 1 is atomic fluorescence spectrometry, measuring range (mass fraction).

0.00010%~0.500%; method 2 is the direct method of solid sample injection, the measurement range (mass fraction). 0.0000010%~0.0250%.

For lead concentrates with mercury content (mass fraction) ranging from 0.00010% to 0.0250%, method 2 is used as the arbitration method.

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

3 Terms and Definitions

This document does not have terms and definitions that need to be defined.

4 Method 1 Atomic Fluorescence Spectrometry