YS/T 820.26-2012 English PDF (YST820.26-2012)

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YS/T 820.26-2012: Methods for chemical analysis of laterite nickel ores. Part 26: Determination of loss on ignition. Gravimetric method
YS/T 820.26-2012
YS
NONFERROUS METAL INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 73.060
D 04
Methods for chemical analysis of laterite nickel ores -
Part 26: Determination of loss on ignition -
Gravimetric method
ISSUED ON: NOVEMBER 7, 2012
IMPLEMENTED ON: MARCH 1, 2013
Issued by: Ministry of Industry and Information Technology of PRC
Table of Contents
Foreword ... 3
1 Scope ... 6
2 Method summary ... 6
3 Instruments ... 6
4 Samples ... 6
5 Analysis steps ... 6
6 Calculation of analysis results ... 7
7 Precision... 7
8 Test report ... 8
Foreword
This part is drafted in accordance with the provisions of GB/T 1.1-2009.
YS/T 820-2012 "Methods for chemical analysis of lateritic nickel ore" is divided
into 26 parts:
- Part 1: Determination of nickel content. Flame atomic absorption
spectrometry;
- Part 2: Determination of nickel content. Dimethylglyoxime
spectrophotometry;
- Part 3: Determination of total iron content. Potassium dichromate titration;
- Part 4: Determination of phosphorus content. Phosphorus molybdenum
blue spectrophotometry;
- Part 5: Determination of cobalt content. Flame atomic absorption
spectrometry;
- Part 6: Determination of copper content. Flame atomic absorption
spectrometry;
- Part 7: Determination of calcium and magnesium content. Flame atomic
absorption spectrometry;
- Part 8: Determination of silica content. Potassium silico-fluoride titrimetric
method;
- Part 9: Determination of scandium and cadmium contents. Inductively
coupled plasma mass spectrometry;
- Part 10: Determination of calcium, cobalt, copper, magnesium, manganese,
nickel, phosphate and zinc content. Inductively coupled plasma atomic
emission spectrometry;
- Part 11: Determination of fluorine and chlorine contents. Ion
chromatography;
- Part 12: Determination of manganese content. Flame atomic absorption
spectrometry;
- Part 13: Determination of lead content. Flame atomic absorption
spectrometry;
Methods for chemical analysis of laterite nickel ores -
Part 26: Determination of loss on ignition -
Gravimetric method
1 Scope
This part of YS/T 820 specifies the gravimetric method for the determination of
loss on ignition (LOI) in laterite nickel ore.
This part applies to the determination of loss on ignition in laterite nickel ore.
The measurement range is 6.00%~14.00%.
2 Method summary
Ignite the pre-dried sample to a constant weight at 1000 °C; calculate the loss
on ignition (LOI) according to the reduced mass of the sample.
3 Instruments
3.1 High-temperature furnace: the temperature can be controlled at
1000 °C±50 °C.
3.2 Porcelain crucible: make its weight constant at 1000 °C before use.
4 Samples
The particle size of the samples shall be less than 160 μm; bake them in an
oven at 105 °C~110 °C for 2 h, and cool them to room temperature in a
desiccator.
5 Analysis steps
5.1 Sample
Weigh 1.00 g sample; the weight shall be accurate to 0.0002 g.
5.2 Number of measurements