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GB/T 38216.9-2026Steel slag — Determination of sodium oxide and potassium oxide content (English PDF)

钢渣　氧化钠和氧化钾含量的测定

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Issued by

SAMR; SAC

Level / Type

National · Recommended

Issue date

July 30, 2026

Implementation date

February 1, 2027

Scope

GB/T 38216.9-2026 is the English-translated version of 钢渣　氧化钠和氧化钾含量的测定.

GB/T 38216.9-2026 is the Chinese standard "Steel slag — Determination of sodium oxide and potassium oxide content". Its scope clause reads: This document describes methods for determining the sodium oxide and potassium oxide content in steel slag using flame photometry and flame atomic absorption spectrometry.

This document applies to the determination of sodium oxide and potassium oxide content in steel slag. The sodium oxide content determination range (mass fraction) is 0.010%~ 1.60%, and the potassium oxide content determination range (mass fraction) is 0.010%~1.30%. Its clauses include terms and definitions.

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Document preview — GB/T 38216.9-2026

National Standard of the People's Republic of China

ICS: 77.140.99
Classification: H 34

Issued by: State Administration for Market Regulation; Standardization Administration of the PRC

Foreword
1 Scope
2 Edition and transition
3 Classification and status
4 Structure of the document
5 The English edition

1 Scope

This document describes methods for determining the sodium oxide and potassium oxide content in steel slag using flame photometry and flame atomic absorption spectrometry.

This document applies to the determination of sodium oxide and potassium oxide content in steel slag. The sodium oxide content determination range (mass fraction) is 0.010%~

1.60%, and the potassium oxide content determination range (mass fraction) is 0.010%~1.30%.

2 Normative references

The contents of the following documents, through normative references within the text, constitute essential provisions of this document. Dated citations are not included.

For references to documents, only the version corresponding to that date applies to this document; for undated references, the latest version (including all amendments) applies.

This document.

GB/T 2007.1 General Rules for Sampling and Sample Preparation of Bulk Mineral Products - Manual Sampling Method

GB/T 2007.2 General Rules for Sampling and Sample Preparation of Bulk Mineral Products - Manual Sample Preparation Method

GB/T 6379.1 Accuracy (Correctness and Precision) of Measurement Methods and Results - Part 1.General Principles and Definitions

GB/T 6379.2 Accuracy (correctness and precision) of measurement methods and results - Part 2.Determining the repeatability of standard measurement methods

Basic methods of sex and representation

GB/T 7728 General Rules for Chemical Analysis of Metallurgical Products by Flame Atomic Absorption Spectrometry

GB/T 8170 Rules for rounding off numerical values and the representation and determination of limiting values

GB/T 12806 Laboratory Glassware - Single-mark volumetric flasks

GB/T 12807 Graduated Pipettes for Laboratory Glassware

GB/T 12808 Laboratory Glassware - Single-mark Pipettes

3 Terms and Definitions

This document does not contain any terms or definitions that need to be defined.

4 Method 1.Flame Photometry

4.1 Principle

Silicon was removed by evaporation of the sample with hydrofluoric acid and sulfuric acid, and the residue was leached with hot water. Iron, aluminum, calcium, and magnesium were separated by ammonia and ammonium carbonate, respectively.

The emission intensity of sodium at 589.0 nm and the emission intensity of potassium at 766.5 nm of the filtrate were measured using a flame photometer and compared with the corresponding calibration curve.

Compare the emission intensity of the lines and calculate the content of sodium oxide and potassium oxide in the sample.

4.2 Reagents

Unless otherwise specified, only reagents of approved analytical grade or higher and reagents conforming to GB/T 6682 or higher shall be used in the analysis.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 15 pages — is available in the English PDF.

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