YS/T 273.13-2006 English PDF (YST273.13-2006)

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YS/T 273.13-2006: Chemical analysis methods and physical properties of cryolite. Part 13: Preparation and storage of test samples
YS/T 273.13-2006
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.10
H 21
Replacing YS/T 272-1994
Chemical analysis methods and physical properties of
cryolite - Part 13: Preparation and storage of test samples
ISSUED ON: MAY 25, 2006
IMPLEMENTED ON: DECEMBER 1, 2006
Issued by: Ministry of Industry and Information Technology of the PRC
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Normative references ... 5
3 Preparation and storage of test samples ... 5
4 Container markings ... 6
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
3.1 Laboratory samples
Laboratory samples shall be prepared and stored using the methods specified in GB/T
4291.
3.2 Preparation of raw test samples
For the determination of certain geometric properties, for the testing of certain physical
and physicochemical properties, and for the determination of moisture content.
Take about 300 g of laboratory samples (3.1) and place them in a sealed container. The
container should be almost filled with the sample.
3.3 Preparation of dry test samples
For the determination of chemical tests, and certain geometric properties as well as
certain physical and physicochemical tests.
3.3.1 Test sample grinding
Grind and sieve the test samples until all pass through a sieve with an aperture of 0.125
mm. Thoroughly mix the sieved samples and dry them at about 110 °C.