YS/T 581.2-2006 English PDF (YST581.2-2006)

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YS/T 581.2-2006: Determination of chemical contents and physical properties of aluminium fluoride. Part 2: Determination of ignition loss
YS/T 581.2-2006
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.10
H 21
Determination of chemical contents and physical
properties of aluminium fluoride - Part 2:
Determination of ignition loss
ISSUED ON: MARCH 07, 2006
IMPLEMENTED ON: AUGUST 01, 2006
Issued by: National Development and Reform Commission
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Method principle
 ... 5
3 Instruments and equipment... 5
4 Test samples ... 5
5 Analytical procedure ... 5
6 Calculation of analysis results ... 6
7 Precision ... 6
8 Quality assurance and control ... 7
Foreword
YS/T 581 "Determination of chemical contents and physical properties of
aluminium fluoride" is divided into 15 parts:
- Part 1: Determination of moisture content by gravimetric method
- Part 2: Determination of ignition loss
- Part 3: Determination of fluoride content distillation-thorium nitrate titration
volumetric method
- Part 4: Determination of aluminium by the EDTA volumetric 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 orthophenanthroline photometric
method
- Part 8: Determination of sulphate content by barium sulphate gravimetric
method
- Part 9: Determination of phosphorous content by molybdophoshoric lieu
photometric method
- Part 10: Determination of sulphur content by X-ray fluorescence
spectrometric method
- Part 11: Preparation and storage of test samples
- Part 12: Determination of size distribution - Sieving method
- Part 13: Measurement of the angle of repose
- Part 14: Determination of untamped density
- Part 15: Free alumina content
This Part is Part 2.
This Part was proposed by and shall be under the jurisdiction of National
Technical Committee 243 on Nonferrous Metals of Standardization
Administration of China.
Fushun Aluminium Factory and China Nonferrous Metals Industry Standard and
Determination of chemical contents and physical
properties of aluminium fluoride - Part 2:
Determination of ignition loss
1 Scope
This Part specifies the determination method for ignition loss of aluminium
fluoride.
This Part applies to the determination of ignition loss of aluminium fluoride.
Determination range: 0.20%~8.00%.
2 Method principle

The test portion is burned at 550°C±5°C for 30 min. From the difference
between the mass of the test portion before and after burning, calculate the
ignition loss.
3 Instruments and equipment
3.1 High-temperature furnace: The temperature can be controlled at
550°C±5°C.
3.2 Platinum crucible: Diameter is 30 mm; height is 40 mm; with lid.
4 Test samples
It shall meet the requirements of 3.2 in YS/T 581.11.
5 Analytical procedure
5.1 Test portion
When the ignition loss is not more than 1%, weigh 5 g of test sample (4). When
the ignition loss is more than 1%, weigh 2.5 g of test sample (4). The mass of
the test portion is recorded as m0.
5.2 Number of determinations