GB/T 3286.12-2023Methods for chemical analysis of limestone and dolornite—Part 12: Determination of potassium oxide and sodium oxide contents—Flame atomic absorption spectrometry method (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 12 of GB/T 3286 "Chemical Analysis Methods for Limestone and Dolomite". GB/T 3286 has released the following part.

---Part 1: Determination of calcium oxide and magnesium oxide content by complex titration and flame atomic absorption spectrometry;

---Part 2: Determination of silica content by silicon-molybdenum blue spectrophotometry and perchloric acid dehydration gravimetric method;

---Part 3: Determination of aluminum oxide content by chromium azure S spectrophotometry and complexometric titration;

---Part 4: Determination of iron oxide content by phenanthroline spectrophotometry and flame atomic absorption spectrometry;

---Part 5: Determination of manganese oxide content by periodate oxidation spectrophotometry;

---Part 6: Determination of phosphorus content by phosphorus molybdenum blue spectrophotometry;

---Part 7: Determination of sulfur content in tube furnace combustion-potassium iodate titration method, high-frequency combustion infrared absorption method and barium sulfate gravimetric method;

---Part 8: Gravimetric method for determination of loss on ignition;

---Part 9: Determination of carbon dioxide content by caustic soda asbestos absorption gravimetric method;

---Part 10: Determination of titanium dioxide content by diantipyridine methane spectrophotometry;

---Part 11: Determination of calcium oxide, magnesium oxide, silica, aluminum oxide and iron oxide content wavelength dispersive X-ray fluorescence light Spectral method (cast glass plate method);

---Part 12: Determination of potassium oxide and sodium oxide content by flame atomic absorption spectrometry;

Introduction

GB/T 3286 "Chemical Analysis Methods for Limestone and Dolomite" specifies the chemical analysis of specified characteristics or indicators of limestone and dolomite.

The method aims to provide a basis for the analysis of the chemical composition of limestone and dolomite. In order to ensure the usability of the documents, the documents are compiled into several parts.

It is divided into parts and is intended to be composed of the following parts.

---Part 1: Determination of calcium oxide and magnesium oxide content by complex titration and flame atomic absorption spectrometry. The purpose is to determine the stone Calcium oxide and magnesium oxide content in limestone and dolomite;

---Part 2: Determination of silica content by silicon molybdenum blue spectrophotometry and perchloric acid dehydration gravimetric method. The purpose is to measure lime Silica content in stone and dolomite;

---Part 3: Determination of aluminum oxide content by chromium azure S spectrophotometry and complexometric titration. The purpose is to measure limestone and white Aluminum oxide content in marble;

---Part 4: Determination of iron oxide content by phenanthroline spectrophotometry and flame atomic absorption spectrometry. The purpose is to measure Iron oxide content in limestone and dolomite;

---Part 5: Determination of manganese oxide content by periodate oxidation spectrophotometry. The purpose is to measure the oxygen in limestone and dolomite Manganese content;

---Part 6: Determination of phosphorus content by phosphorus molybdenum blue spectrophotometry. The purpose is to determine the phosphorus content in limestone and dolomite;

---Part 7: Determination of sulfur content in tube furnace combustion-potassium iodate titration method, high-frequency combustion infrared absorption method and barium sulfate gravimetric method. The purpose is to determine the sulfur content in limestone and dolomite;

---Part 8: Gravimetric method for determination of loss on ignition. The purpose is to determine the ignition loss of limestone and dolomite;

---Part 9: Determination of carbon dioxide content by caustic soda asbestos absorption gravimetric method. The purpose is to determine the dioxide content in limestone and dolomite Carbon content;

---Part 10: Determination of titanium dioxide content by diantipyridine methane spectrophotometry. The purpose is to measure limestone and dolomite Medium titanium dioxide content;

---Part 11: Determination of calcium oxide, magnesium oxide, silica, aluminum oxide and iron oxide content wavelength dispersive X-ray fluorescence light Spectral method (cast glass plate method). The purpose is to determine the calcium oxide, magnesium oxide, silica, alumina and oxygen in limestone and dolomite. Iron content;

---Part 12: Determination of potassium oxide and sodium oxide content by flame atomic absorption spectrometry. The purpose is to measure limestone and dolomite Medium potassium oxide and sodium oxide content;

---Part 13: Determination of silicon, manganese, phosphorus, aluminum, titanium, iron and magnesium content by inductively coupled plasma atomic emission spectrometry. Purpose It is used to measure the content of silicon, manganese, phosphorus, aluminum, titanium, iron and magnesium in limestone and dolomite.

Warning - Personnel using this document should have regular laboratory work experience. All possible security issues not addressed in this document It is the user's responsibility to take appropriate safety and health measures and ensure compliance with the conditions stipulated in relevant national laws and regulations.

1 Scope

This document describes a method for the determination of potassium oxide and sodium oxide in limestone and dolomite by flame atomic absorption spectrometry.

This document is applicable to the determination of potassium oxide and sodium oxide content in limestone and dolomite. Measuring range (mass fraction): potassium oxide content 0.005%~1.00%, sodium oxide content 0.005%~0.50%.

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 2007.2 General principles for sampling and preparation of bulk mineral products, manual sample preparation methods

GB/T 6379.1 Accuracy of measurement methods and results (correctness and precision) Part 1: General principles and definitions

GB/T 6379.2 Accuracy of measurement methods and results (correctness and precision) Part 2: Determination of repeatability of standard measurement methods Basic methods of sex and reproducibility

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

GB/T 7728 General rules for flame atomic absorption spectrometry for chemical analysis of metallurgical products

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

GB/T 12806 Laboratory glassware single-marked volumetric flasks

GB/T 12807 Graduated pipettes for laboratory glass instruments

GB/T 12808 Single-marked pipette for laboratory glass instruments

3 Terms and definitions

There are no terms or definitions to be defined in this document.

4 Principles

Decompose the sample with hydrochloric acid, hydrofluoric acid and perchloric acid, evaporate to nearly dryness, dissolve the salts with hydrochloric acid, and dilute to constant volume. In atomic absorption spectrometer Above, an air-acetylene flame was used to measure the absorbance of potassium and sodium at wavelengths of 766.5nm and 589.0nm respectively, and the calibration curve method was used to analyze Don't calculate the mass fraction of potassium and sodium.