GB/T 20899.5-2021Methods for chemical analysis of gold ores—Part 5: Determination of lead content (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 of Standardization Documents" Drafting.

This document is part 5 of GB/T 20899 "Methods for Chemical Analysis of Gold Ore". GB/T 20899 has published the following 14 part.

---Part 1: Determination of the amount of gold;

---Part 2: Determination of silver content by flame atomic absorption spectrometry;

---Part 3: Determination of arsenic content;

---Part 4: Determination of copper content;

---Part 5: Determination of lead content;

---Part 6: Determination of the amount of zinc;

---Part 7: Determination of iron content;

---Part 8: Determination of sulfur content;

---Part 9: Determination of carbon content;

---Part 10: Determination of the amount of antimony;

---Part 11: Determination of the amount of arsenic and bismuth;

---Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth content by atomic fluorescence spectrometry;

---Part 13: Determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury content inductively coupled plasma atomic emission spectrometry;

---Part 14: Determination of the amount of thallium inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry.

This document replaces GB/T 20899.5-2007 "Methods for Chemical Analysis of Gold Ore Part 5: Determination of Lead Content", and Compared with GB/T 20899.5-2007, in addition to structural adjustments and editorial changes, the main technical changes are as follows.

a) In Method 1, the measurement range is adjusted from "0.50%~5.00%" to "0.10%~5.00%" (see Chapter 1, Chapter 2 of the 2007 edition) chapter);

b) Deleted the "allowable difference" requirement (see.2007 version of 2.7, 3.6);

c) Added "repeatability" and "reproducibility" requirements (see 4.7, 5.7);

d) In Method 2, the sample digestion and interference elimination methods are changed (see 5.5.3, 2007 version 3.4.3);

e) In Method 2, the correction of the lead content in the filtrate has been added (see 5.5.3.6).

Introduction

GB/T 20899 "Gold Ore Chemical Analysis Method" aims to help gold industrial and mining enterprises accurately understand the valuable elements and impurity content of gold ore.

It is beneficial to optimize the control parameters of the dressing and smelting process, accurately control the consumption of reagents, reduce the interference of impurity elements on the smelting and purification process, and improve the The comprehensive recovery rate of price elements can contribute to the efficient recycling of resources of the entire gold industry, sustainable green and healthy development, and the construction of smart mines.

Provide technical support. GB/T 20899 is proposed to be composed of 15 parts.

---Part 1: Determination of the amount of gold and silver. The purpose is to specify the fire test weight method and fire test for the determination of the amount of gold and silver in gold ore.

Gold enrichment-flame atomic absorption spectrometry, activated carbon enrichment-flame atomic absorption spectrometry, activated carbon enrichment-iodometric method and various methods Applicable measurement range.

---Part 2: Determination of the amount of silver flame atomic absorption spectrometry. The purpose is to specify the flame atom for the determination of silver content in gold ore Absorption spectroscopy and applicable measurement range.

---Part 3: Determination of arsenic content. The purpose is to specify the silver diethyldithiocarbamate spectrophotometry for the determination of arsenic in gold ore Degree method and potassium dichromate titration method and the applicable measurement range of each method.

---Part 4: Determination of copper content. The purpose is to specify flame atomic absorption spectrometry and thiosulfuric acid for the determination of copper in gold ore Sodium titration method and the applicable measurement range of each method.

---Part 5: Determination of lead content. The purpose is to specify the flame atomic absorption spectrometry and ethylenediamine tetrachloride for the determination of lead in gold ore.

The disodium acetate titration method and the applicable measurement range of each method.

---Part 6: Determination of the amount of zinc. The purpose is to specify the flame atomic absorption spectrometry for the determination of zinc in gold ore and the applicable measurement Set range.

---Part 7: Determination of iron content. The purpose is to specify the potassium dichromate titration method for the determination of iron in gold ore and the applicable determination Scope.

---Part 8: Determination of sulfur content. The purpose is to specify the barium sulfate gravimetric method and the combustion-acid-base titration method for the determination of sulfur content in gold ore And the applicable measurement range of each method.

---Part 9: Determination of carbon content. The purpose is to specify the ethanol-ethanolamine-potassium hydroxide titration method for the determination of carbon in gold ore and Applicable measurement range.

---Part 10: Determination of the amount of antimony. The purpose is to specify the cerium sulfate titration method and the hydride generation method for the determination of antimony in gold ore. Sub-fluorescence spectroscopy and the applicable measurement range of each method.

---Part 11: Determination of the amount of arsenic and bismuth. The purpose is to specify the hydride generation for the determination of the amount of arsenic and bismuth in gold ore-atom Fluorescence spectroscopy and applicable measurement range.

---Part 12: Determination of arsenic, mercury, cadmium, lead and bismuth content by atomic fluorescence spectrometry. The purpose is to regulate arsenic, mercury, cadmium, Hydride generation-atomic fluorescence spectrometry for the determination of lead and bismuth content and the applicable measurement range.

--- Part 13: Determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury content inductively coupled plasma atomic emission spectrometry. Aim at Inductively coupled plasma atomic emission spectrometry for the determination of lead, zinc, bismuth, cadmium, chromium, arsenic and mercury in gold ores and its application The measurement range.

---Part 14: Determination of the amount of thallium inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry. Item It lies in inductively coupled plasma atomic emission spectrometry and inductively coupled plasma mass spectrometry for the determination of thallium in gold ore Method and the applicable measurement range of each method.

---Part 15: Determination of the amount of copper, lead, zinc, silver, iron, manganese, nickel, cobalt, aluminum, chromium, cadmium, antimony, bismuth, arsenic, mercury, selenium, barium and beryllium Combined plasma mass spectrometry. The purpose is to specify copper, lead, zinc, silver, iron, manganese, nickel, cobalt, aluminum, chromium, cadmium, antimony, bismuth, arsenic, Inductively coupled plasma mass spectrometry for the determination of mercury, selenium, barium and beryllium and its applicable measurement range.

1 Scope

This document specifies the method for determining the amount of lead in gold ore.

This document includes two measurement methods. Method 1 and Method 2.Method 1 is suitable for the determination of lead in gold ore, and the measurement range is.

0.10%~5.00%; Method 2 is suitable for the determination of lead in gold ores with barium content less than 1%, and the measurement range. >5.00%~15.00%.

2 Normative references

The contents of the following documents constitute the indispensable clauses of this document through normative references in the text. Among them, dated quotations Only the version corresponding to that date is applicable to this document; for undated reference documents, the latest version (including all amendments) is applicable to this document.

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.Flame atomic absorption spectrometry