YS/T 273.1-2020 English PDF (YST273.1-2020)

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YS/T 273.1-2020: Methods for chemical analysis and physical properties test of cryolite - Part 1: Determination of moisture content - Gravimetric method
YS/T 273.1-2020
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 71.100.10
H 30
Replacing YS/T 273.1-2006
Methods for chemical analysis and physical properties test of
cryolite - Part 1: Determination of moisture content -
Gravimetric method
ISSUED ON: DECEMBER 09, 2020
IMPLEMENTED ON: APRIL 01, 2021
Issued by: Ministry of Industry and Information Technology of PRC.
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Method summary ... 5
3 Instruments ... 5
4 Specimens ... 5
5 Analytical steps ... 5
6 Calculation of test results ... 6
7 Precision ... 6
8 Test report ... 7
Foreword
YS/T 273 "Methods for chemical analysis and physical properties test of cryolite" is
divided into 17 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 aluminum 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 sulfur 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;
- Part 14: X-ray fluorescence spectrometric method for the determination of elements
content;
- Part 15: X-ray fluorescence spectrometric method for the determination of elements
content using pressed powder tablets;
- Part 16: Determination of lithium content - Flame atomic absorption spectrometric
method;
- Part 17: Determination of elements content - Inductively coupled plasma atomic
emission spectrometric method.
This Part is Part 1 of YS/T 273.
Methods for chemical analysis and physical properties test of
cryolite - Part 1: Determination of moisture content -
Gravimetric method
1 Scope
This Part specifies the method for determination of moisture content in cryolite.
This Part applies to the determination of moisture content in cryolite. Measuring range:
≤ 1.50%.
2 Method summary
After the sample is dried in the oven, the difference in mass of the sample before and
after drying is calculated, which is the moisture content of the sample.
3 Instruments
3.1 Weighing bottle: The diameter is 45 mm; it is flat type, which has a lid.
3.2 Oven: It is capable of controlling the temperature at 110 °C ± 5 °C.
3.3 Dryer.
4 Specimens
The specimens shall be kept in a sealed container. It shall mixed thoroughly before
weighing.
5 Analytical steps
5.1 Sample
Weigh 5.0 g of specimen (4), accurate to 0.0001 g.
5.2 Parallel test
Do two tests in parallel. Take the average value.