YS/T 535.8-2009Chemical analysis methods of sodium fluoride. Part 8: Determination of water insoluble matter content. Gravimetric method (English PDF)

Foreword

YS/T 535 "sodium fluoride chemical analysis method" is divided into 10 parts.

- Part 1. Determination of wet water content - Weight method;

- Part 2. Determination of fluorine content - Distillation - thorium nitrate titration capacity method;

- Part 3. Determination of silicon content - Molybdenum blue spectrophotometric method;

- Part 4. Determination of iron content - o - phenanthroline spectrophotometric method;

- Part 5. Determination of soluble sulfate content - Turbidimetric method;

- Part 6. Determination of carbonate content - Gravimetric method;

- Part 7. Determination of acidity and neutral method;

- Part 8. Determination of water insoluble content - Gravimetric method;

- Part 9. Determination of chlorine content - Turbidimetric method;

- Part 10. Preparation and storage of specimens.

This section is part 8.

This part replaces YS/T 535.8-2006 (original GB/T 8158.8-1987).

This part is the revision of YS/T 535.8-2006 "Determination of water insoluble content by gravimetric method for chemical analysis of sodium fluoride" YS/T 535.8-2006 compared to increase the precision and quality assurance and control and so on.

This part of the National Nonferrous Metals Standardization Technical Committee proposed and centralized.

1 Scope

This section specifies the determination of the amount of water insoluble in sodium fluoride.

This part is applicable to the determination of the amount of water insoluble in sodium fluoride. Determination range (mass fraction). <=15.0%.

2 Normative reference documents

The terms of this document are incorporated by reference in this section and become part of this section. Whichever is the date of the reference file, which is followed by all (Excluding corrigenda) or revisions do not apply to this part, however, encourage parties to reach an agreement under this section Whether you can use the latest version of these files. For undated references, the latest edition applies to this section.

Methods for chemical analysis of sodium fluoride - Part 10. Preparation and storage of samples YS/T 535.10-2009

3 Method summary

Dissolve the sample with water, filter out insoluble matter, dry weighing.

4 Instruments and equipment

4.1 General laboratory equipment.

4.2 glass filter crucible (G3).

4.3 blast oven. can control at 110 °C ± 8 °C.

5 Samples

The specimen shall comply with the requirements of 4.2 of YS/T 535.10-2009.

6 Analysis steps