YS/T 509.11-2008 English PDF (YST509.11-2008)

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YS/T 509.11-2008: Methods for chemical analysis of spodumene and lepidolite concentrates. Determination of loss on ignition. Gravimetric method
YS/T 509.11-2008
YS
NONFERROUS METALS INDUSTRY STANDARD
OF THE PEOPLE’S REPUBLIC OF CHINA
ICS 77.120.99
H 64
Replacing YS/T 509.12-2006
Methods for Chemical Analysis of Spodumene and
Lepidolite Concentrates - Determination of Loss on
Ignition - Gravimetric Method
ISSUED ON: MARCH 12, 2008
IMPLEMENTED ON: SEPTEMBER 01, 2008
Issued by: National Development and Reform Commission of China
Table of Contents
Foreword ... 3
1 Scope ... 5
2 Summary of Method ... 5
3 Instrument ... 5
4 Specimen ... 5
5 Analysis Procedures ... 5
6 Calculation of the Analysis Results ... 6
7 Precision ... 6
8 Quality Assurance and Control ... 7
Foreword
YS/T 509 Methods for chemical analysis of spodumene and lepidolite concentrates
consists of the following 11 parts:
--- Part 1: Determination of lithium oxide sodium oxide and potassium oxide
contents - Flame atomic absorption spectrometric method;
--- Part 2: Determination of rubidium oxide and caesium oxide contents - Flame
atomic absorption spectrometric method;
--- Part 3: Determination of silicon dioxide content - Gravimetric-molybdenum blue
photometric method;
--- Part 4: Determination of aluminium oxide content - EDTA compleximetric method;
--- Part 5: Determination of ferric oxide content - O-phenanthroline photometric
method and EDTA compleximetric method;
--- Part 6: Determination of phosphorus pentoxide content - The molybdenum blue
photometric method;
--- Part 7: Determination of beryllium oxide content – Chromazurol S and
cetyltrimethyl ammonium bromide spectrophotometric met;
--- Part 8: Determination of calcium oxide and magnesium oxide content - Flame
atomic absorption spectrometric method;
--- Part 9: Determination of fluorine content - Ion selective electrode method;
--- Part 10: Determination of manganous oxide content-Persulfate oxidation
photometric method;
--- Part 11: Determination of loss on ignition - Gravimetric method.
This Part is Part 11.
This Part replaced YS/T 509.12-2006 Methods for Chemical Analysis of Spodumene
and Lepidolite Concentrates - The Gravimetric Method for the Determination of Loss
on Ignition (original GB/T 3885.12-1983).
Compared with YS/T 509.12-2006, the major changes of this Part are as follows:
--- Re-edit the text format;
--- Supplement the quality assurance and control clauses; and add the repeatability
clause.
Methods for Chemical Analysis of Spodumene and
Lepidolite Concentrates - Determination of Loss on
Ignition - Gravimetric Method
1 Scope
This Part specifies the method for determining loss on ignition in spodumene and
lepidolite concentrates.
This Part is applicable to the determination of loss on ignition in spodumene and
lepidolite concentrates.
2 Summary of Method
The test material is placed in a high-temperature furnace and burned repeatedly at
900°C~950°C to a constant weight.
3 Instrument
High-temperature furnace: Equipped with thermocouple for temperature measurement
and millivoltmeter.
4 Specimen
4.1 Spodumene concentrates shall pass through a sieve with a mesh of 0.074mm; and
lepidolite concentrates shall pass through a sieve with a mesh of 0.105mm.
4.2 The specimen is pre-baked at 105°C~110°C for 2h; and then placed in a desiccator
to cool to room temperature.
5 Analysis Procedures
5.1 Test material
Weigh 2.0g of spodumene concentrate specimen, accurate to 0.0001g. Weigh 0.50g