GB/T 8152.16-2022Methods for chemical analysis of lead concentrates—Part 16: Determination of calcium oxide content—Flame atomic absorption spectrometric 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 of Standardization Documents" drafted.

This document is Part 16 of GB/T 8152 "Methods for Chemical Analysis of Lead Concentrates", GB/T 8152 "Methods for Chemical Analysis of Lead Concentrates" has been The following sections were published.

--- Part 1: Determination of the amount of lead acid dissolution-EDTA titration;

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

--- Part 3: Determination of the amount of aluminum oxide chrome azure S spectrophotometry;

--- Part 4: Determination of zinc content by EDTA titration;

--- Part 5: Determination of Arsenic Atomic Fluorescence Spectrometry;

--- Part 6: Polarographic determination of bismuth content;

--- 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 content by flame atomic absorption spectrometry;

--- Part 10: Determination of silver content and gold content by lead precipitation or ash-blown fire test and flame atomic absorption spectrometry;

--- Part 11: Determination of mercury content by atomic fluorescence spectrometry;

--- Part 12: Determination of cadmium content by flame atomic absorption spectrometry;

--- Part 13: Determination of thallium content 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.

Introduction

This document is Part 16 of GB/T 8152 "Methods for Chemical Analysis of Lead Concentrates", which is a supplement and improvement to this series of standards.

GB/T 8152 "Methods for Chemical Analysis of Lead Concentrates" revised and released 10 methods in.2006 (2 methods for the determination of bismuth in the 1987 edition continued Reservation, a total of 12 methods), and then considering the needs of environmental protection and production control, in.2017, the 13th part of the method for determination of thallium was released, in In.2019, Part 14 for the determination of silica content was published, and in May 2021, Part 15 for the determination of soluble lead content was published.

In addition, the release of the new method for the determination of calcium oxide content and the subsequent inductively coupled plasma emission spectrometry to be added are more Elemental determination methods will improve the ease of use and applicability of the standard. In addition, the determination of antimony content in lead concentrates can refer to the national regulations issued in 2020.

National standardization guiding technical document GB /Z 39124-2020 "Determination of Antimony Content in Lead Concentrate Chemical Analysis Method" Cerium Sulfate Titration Method.

Methods for chemical analysis of lead concentrates Part 16: Determination of calcium oxide content flame atomic absorption spectrometry Caution - Persons using this document should have practical experience in formal laboratory work. This document does not address all possible security issues question. It is the user's responsibility to take appropriate safety and health measures and to ensure compliance with the conditions stipulated by relevant national regulations.

1 Scope

This document specifies a method for the determination of calcium oxide content in lead concentrates.

This document applies to the determination of calcium oxide content in lead concentrates. The measurement range is. 1.00%~5.00%.

2 Normative references

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

GB/T 6682 Analysis Laboratory Water Specifications and Test Methods

3 Terms and Definitions

There are no terms and definitions that need to be defined in this document.

4 Method summary

The sample is dissolved with hydrochloric acid, nitric acid, hydrofluoric acid and perchloric acid. In the dilute hydrochloric acid medium, a certain amount of strontium chloride is added to suppress interfering elements.

Air-acetylene flame, at the wavelength of 422.7nm atomic absorption spectrometer, measure the absorbance of calcium, and calculate the content of calcium oxide by working curve method.

5 Reagents

Unless otherwise specified, only analytical grade reagents were used.

5.1 Water, GB/T 6682, Class II.

5.2 Hydrofluoric acid (rho=1.15g/mL).

5.3 Hydrochloric acid (rho=1.19g/mL).

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

5.5 Hydrobromic acid (rho=1.50g/mL).

5.6 Perchloric acid (rho=1.76g/mL).

5.7 Hydrochloric acid (1 1).

5.8 Strontium solution (20g/L). Weigh 30.43g of strontium chloride (SrCl2·6H2O) in a 250mL beaker, dissolve it in water, and transfer it to In a 500mL volumetric flask, dilute to the mark with water and mix well.