GB/T 5686.1-2022Ferromanganese，ferromanganese-silicon，nitrogen-bearing ferromanganese and manganese metal—Determination of manganese content—Potentiometric method， titrimetric method after ammonium nitrate oxidation and titrimetric method after perchloric acid oxidation (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 1 of GB/T 5686.GB/T 5686 has released the following parts.

--- Part 1: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese manganese content by potentiometric titration, ammonium nitrate oxidative titration method and perchloric acid oxidative titration;

--- Part 2: Determination of ferromanganese, manganese-silicon alloys, ferromanganese nitride and metal manganese-silicon content molybdenum blue photometric method, potassium fluorosilicate titration method and perchloric acid gravimetric method;

--- Part 4: Determination of ferromanganese, manganese-silicon alloys, ferromanganese nitride and metallic manganese phosphorus content Molybdenum blue spectrophotometry and bismuth phosphorus molybdenum blue Spectrophotometry;

--- Part 5: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese carbon content infrared absorption method, gas volume method, Gravimetric and Coulomb methods;

--- Part 7: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese sulfur content by infrared absorption method and combustion neutralization drop statute.

This document replaces GB/T 5686.1-2008 "Determination of content of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese manganese by potentiometric titration method, ammonium nitrate oxidative titration and perchloric acid oxidative titration", compared with GB/T 5686.1-2008, except for structural adjustment and editorial changes In addition, the main technical changes are as follows.

a) Changed the scope of application (see Chapter 1, Chapter 1 of the 2008 edition);

b) Method 1 replaces the saturated sodium pyrophosphate solution with potassium pyrophosphate solution (see 4.2.10, 3.2.7 of the 2008 edition);

c) Added the content of standard titration solution of potassium permanganate with manganese standard solution in Method 1 (see 4.2.13, 2008 edition 3.2.9.2);

d) Added the description of potentiometric titrator and acidity meter in Method 1 (see 4.3.4 and 4.3.5, 3.3.4 and 3.3.5 of the 2008 edition);

e) Changed the pH value of solution acidity before titration in Method 1 (see 4.5.4.5, 3.5.3.5 of the 2008 edition);

f) Changed the tolerance content (see 4.7, 5.7, 6.7, 3.7, 4.7, 5.7 of the 2008 edition);

g) Added the normative appendix "Procedure Flowchart for Acceptance of Sample Analysis Results" (see Appendix A).

Introduction

Since there are many detection elements involved in the detection process of manganese-based ferroalloys such as ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese, the The scope of application and the method of application vary. In order to ensure the convenience and accuracy of testing standards for ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese Indeed, analytical methods for different elements of ferromanganese, manganese-silicon alloys, ferromanganese nitrides and metal manganese have been established to support ferromanganese, manganese-silicon alloys, nitrides National standard system for the detection of ferromanganese and manganese metal. GB/T 5686 ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese series analysis methods are The basic standard for the detection of ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese in my country consists of the following five parts.

--- Part 1: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese manganese content by potentiometric titration, ammonium nitrate oxidative titration method and perchloric acid oxidative titration. The purpose is to measure the manganese content in ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese.

Potentiometric titration, ammonium nitrate oxidative titration and perchloric acid oxidative titration.

--- Part 2: Determination of ferromanganese, manganese-silicon alloys, ferromanganese nitride and metal manganese-silicon content molybdenum blue photometric method, potassium fluorosilicate titration method and perchloric acid gravimetric method. The purpose is to measure the silicon content in ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese, using molybdenum blue light degree method, potassium fluorosilicate titration method and perchloric acid gravimetric method.

--- Part 4: Determination of ferromanganese, manganese-silicon alloys, ferromanganese nitride and metallic manganese phosphorus content Molybdenum blue spectrophotometry and bismuth phosphorus molybdenum blue Spectrophotometry. The purpose is to measure the phosphorus content in ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese, using molybdenum blue spectrophotometer Spectrophotometry and Bismuth Phosphomolybdenum Blue Spectrophotometry.

--- Part 5: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese carbon content infrared absorption method, gas volume method, Gravimetric and Coulomb methods. The purpose is to measure the carbon content in ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese, using infrared Absorption, gas volumetric, gravimetric and coulometric methods.

--- Part 7: Determination of ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese sulfur content by infrared absorption method and combustion neutralization drop statute. The purpose is to measure the sulfur content in ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese, using infrared absorption method and combustion method. Burn neutralization titration.

Ferromanganese, manganese silicon alloy, ferromanganese nitride and metal manganese Determination of Manganese Content Potentiometric Titration, Ammonium Nitrate Oxidation Titration and perchloric acid oxidative titration Caution - Persons using this document should have formal laboratory work experience. This document does not address all possible security issues 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 describes the use of potentiometric titration, ammonium nitrate oxidative titration, and perchloric acid oxidative titration for the determination of ferromanganese, manganese-silicon alloys, nitrided Method for manganese content in ferromanganese and metallic manganese.

This document is applicable to the determination of manganese content in ferromanganese, manganese-silicon alloy, ferromanganese nitride and metal manganese. The range of determination (mass fraction).

50.00%~98.00%. Method 1 is not applicable to ferromanganese, manganese-silicon alloy, ferromanganese nitride and gold with chromium and vanadium content (mass fraction) greater than 0.4% Determination of manganese content in manganese.

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 4010 Collection and preparation of samples for chemical analysis of ferroalloys

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

GB/T 6379.2 Accuracy (correctness and precision) of measurement methods and results - Part 2: Determining repetition of standard measurement methods Basic Methods of Reproducibility and Reproducibility

GB/T 6682 Analysis Laboratory Water Specifications and Test Methods

GB/T 8170 Numerical Rounding Rules and Representation and Judgment of Limit Values

GB/T 12806 Laboratory glass instrument single-line volumetric flask

GB/T 12807 Laboratory glass instrument indexing pipette

GB/T 12808 Laboratory glass instrument single reticle pipette

3 Terms and Definitions

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

4 Method - potentiometric titration