GB/T 40312-2021Ferrophosphorus—Determination of phosphorus, silicon, manganese and titanium content—Wavelength dispersive X-ray fluorescence spectrometry method (fused cast bead 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" Drafting.

1 Scope

This document describes the method for determining the content of phosphorus, silicon, manganese and titanium in ferrophosphorus by wavelength dispersive X-ray fluorescence spectrometry.

This document is applicable to the determination of phosphorus, silicon, manganese and titanium content in ferrophosphorus. See Table 1 for the determination range of each analysis element.

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 4010 Collection and preparation of samples for chemical analysis of ferroalloys

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

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

GB/T 6682 Analytical laboratory water specifications and test methods

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

GB/T 16597 General Rules of X-ray Fluorescence Spectrometry for Analysis Methods of Metallurgical Products

JJG810 Wavelength Dispersive X-ray Fluorescence Spectrometer

3 Terms and definitions

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

4 Principle

After the sample is subjected to a special pre-oxidation treatment, it is melted into a flat and smooth glass sample, and the primary X-rays generated by the X-ray tube are irradiated to the glass. On the surface of the glass sample, the characteristic X-rays generated are split by the crystal, and the detector measures the X at the 2theta angle corresponding to the selected characteristic wavelength.