YS/T 509.11-2008Methods for chemical analysis of spodumene and lepidolite concentrates. Determination of loss on ignition. Gravimetric method (English PDF)

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

5 Analysis Procedures