GB/T 4734-2022Test methods of chemical analysis for domestic ceramic materials and articles (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 replaces GB/T 4734-1996 "Chemical Analysis Methods for Ceramic Materials and Products". Compared with GB/T 4734-1996, except the knot In addition to structural adjustments and editorial changes, the main technical changes are as follows.

--- Changed the scope (see Chapter 1, Chapter 1 of the 1996 edition);

--- Added terms and definitions (see Chapter 3);

--- Changed the general rules (see Chapter 4, Chapter 3 of the 1996 edition);

--- Increased the determination of alumina content by multi-element combined titration subtraction method (see 6.3.3);

--- Increased the determination of lithium oxide (see 6.8);

--- Increased the determination of boron trioxide (see 6.9);

--- Increased the determination of zinc oxide (see 6.10);

--- Increased the content of phosphorus pentoxide by the quinoline phosphomolybdate gravimetric method (see 6.12.2);

--- Increase the determination of potassium oxide, sodium oxide, lithium oxide, calcium oxide, magnesium oxide, iron trioxide (atomic absorption spectrometry) (see 6.14);

--- Added X-ray fluorescence spectroscopy (see 6.15);

--- Increased quality assurance and control (see Chapter 7);

--- Added test report (see Chapter 8);

--- Added the corresponding wavelength of each element in atomic absorption spectrophotometry (see Appendix A);

--- Added the X-ray fluorescence spectrometry measurement conditions for the amount of primary and secondary components in daily-use ceramic materials and products (see Appendix B);

--- Increased the measurement range of X-ray fluorescence spectrometry for the amount of primary and secondary components in daily-use ceramic materials and products (see Appendix C);

--- Changed the measurement range and analytical value tolerance (see Appendix D, Table 1 of the 1996 edition);

--- Increased the acceptance analysis value procedure (see Appendix E).

1 Scope

This document specifies the ignition loss, silicon dioxide, aluminum oxide, iron oxide, titanium dioxide, oxygen Calcium oxide, magnesium oxide, potassium oxide, sodium oxide, lithium oxide, boron trioxide, zinc oxide, manganese monoxide, phosphorus pentoxide, sulfur trioxide, dioxide Method for the determination of primary and secondary components such as zirconium, strontium, and copper.

This document applies to household ceramic materials and products.

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 1871.1 Determination of phosphorus pentoxide content in phosphate ores and phosphate concentrates - Quinoline phosphomolybdate gravimetric and volumetric methods

GB/T 5000 Terminology of Ceramics for Daily Use

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 9721 General Rules for Molecular Absorption Spectrophotometry of Chemical Reagents (Ultraviolet and Visible Light Parts)

GB/T 12810 Volume calibration and use method of glass measuring instruments for laboratory glass instruments

GB/T 21187 Atomic Absorption Spectrophotometer

JJG630 Flame Photometer Verification Regulations

3 Terms and Definitions

Terms and definitions defined in GB/T 5000 apply to this document.

4 General

4.1 The test water specified in this document shall conform to the specifications of grade 3 water in GB/T 6682.

4.2 The reagents should be of analytical grade or above, and the reagents required for the preparation and calibration of standard solutions should be standard reagents or superior grade.

4.3 Silica, alumina, ferric oxide, titania, calcium oxide, magnesium oxide, potassium oxide, sodium oxide and nine items listed on ignition loss It is included in the routine full analysis items, and should be specified when other items need to be determined.

4.4 The constant weight during the analysis (the difference between the two times before and after the treatment) should not be greater than 0.0002g.

4.5 Parallel tests should be carried out during the analysis.

4.6 The obtained result shall be rounded up according to GB/T 8170, with 2 decimal places; when the content is less than 0.1%, 2 significant figures shall be reserved;

If the contract of the trustee or the relevant standards requires otherwise, the contract shall be revised according to the required number of digits.

5 Samples