YS/T 273.13-2006Chemical analysis methods and physical properties of cryolite. Part 13: Preparation and storage of test samples (English PDF)

Foreword

YS/T 273 Chemical analysis methods and physical properties of cryolite is divided into

13 parts:

- Part 1: Determination of moisture content - Gravimetric method;

- Part 2: Determination of ignition loss;

- Part 3: Determination of fluoride content by distillation-thorium nitrate titration;

- Part 4: Determination of aluminium content - EDTA titration method;

- Part 5: Determination of sodium by flame atomic absorption spectrometric method;

- Part 6: Determination of silica content by the molybdenum blue photometric;

- Part 7: Determination of iron content by orthophenantholine photometric method;

- Part 8: Determination of sulphate content - Barium sulphate gravimetric method;

- Part 9: Determination of phosphorous pentoxide content - Molybdenum blue

photometric method;

- Part 10: Determination of alumina content by gravimetric method;

- Part 11: Determination of sulphur content by X-ray fluorescence spectrometric

method;

- Part 12: The atomic absorption spectrophotometric method for the determination

of calcium oxide content;

- Part 13: Preparation and storage of test samples.

This Part is Part 13.

This Part is a revision of YS/T 272-1994. Except for editing and organization, other

contents are basically unchanged.

This Part replaces YS/T 272-1994.

This Part was proposed by and shall be under the jurisdiction of National Technical

Committee on Nonferrous Metal.

Fushun Aluminium Factory AND China Nonferrous Metals Industry Standard and

Metrology Quality Institute are responsible for the drafting of this Part.

Chemical analysis methods and physical properties of

cryolite - Part 13: Preparation and storage of test samples

1 Scope

This Part specifies the preparation and storage of raw and dry test samples of cryolite.

2 Normative references

The terms in the following documents become the terms of this Part by reference to this

Part. For dated references, all subsequent amendments (not including errata content) or

revisions do not apply to this Part. However, parties to agreements that are based on

this Part are encouraged to study whether the latest versions of these documents can be

used. For undated references, the latest edition applies to this Part.

GB/T 4291, Synthetic cryolite

3 Preparation and storage of test samples