AS 1038.9.1-2000

1 - AS 1038.9.1-2000 COAL AND COKE-ANALYSIS AND TESTING - HIGHER RANK COAL AND COKE-PHOSPHORUS-ASH DIGESTION/MOLYBDENUM BLUE METHOD
4 - PREFACE
4 - CONTENTS
5 - 1 SCOPE
5 - 2 REFERENCED DOCUMENTS
5 - 3 DEFINITIONS
5 - 3.1 Higher rank coal
5 - 4 PRINCIPLE
6 - 5 SAFETY
6 - 6 REAGENTS
6 - 6.1 General
6 - 6.2 Solutions
6 - 6.2.1 Hydrofluoric acid, ( p20 1.15 g/mL), 40 percent m/m
6 - 6.2.2 Sulfuric acid solution (5 mol/L)
6 - 6.2.3 Sodium hydroxide solution (5 mol/L)
6 - 6.2.4 Phenolphthalein indicator
6 - 6.2.5 Ammonium molybdate solution (60 g/L)
6 - 6.2.6 Ascorbic acid solution (50 g/L)
6 - 6.2.7 Antimony potassium tartrate solution (1.36 g/L)
6 - 6.2.8 Reagent solution
7 - 6.3 Standard solutions
7 - 6.3.1 Standard phosphorus solution (1 mL = 100 µg P)
7 - 6.3.2 Dilute standard phosphorus solution (1 mL = 1 µg P)
7 - 7 APPARATUS
7 - 7.1 General
7 - 7.2 Platinum crucibles
7 - 7.3 Sand bath or hot plate
7 - 7.4 Spectrophotometer
7 - 7.5 Weighing device
7 - 7.6 Ashing dishes
7 - 8 SAMPLE
7 - 8.1 General
7 - 8.2 Equilibration
7 - 9 PROCEDURE
7 - 9.1 Number of determinations
8 - 9.2 Blank test
8 - 9.3 Mass of test portion
8 - 9.4 Ashing procedure
8 - 9.5 Decomposition of ash
8 - 9.6 Determination of phosphorus
8 - 9.6.1 Colour development and measurement
9 - 9.6.2 Calibration
9 - 10 CALCULATION
10 - 11 REPORTING OF RESULT
10 - 12 PRECISION
10 - 13 TEST REPORT

Sets out a method for the spectrophotometric determination of phosphorus in higher rank coal and coke, or in the ash of these materials, as molybdenum blue.

This Standard sets out a method for the determination of phosphorus in higher rank coal and coke or in the ash of these materials, as molybdenum blue, by spectrophotometry.This method is applicable also to the determination of phosphorus as phosphorus pentoxide in coal ash and coke ash.

First published as AS KI52.9-1965.Revised and redesigneted as AS 1038.9-1977.Revised and redesignated as AS 1038.9.1-1992.Second edition on 2000.Reconfirmed 2013. Originated as AS K152.9-1965. Previous edition AS 1038.9.1-1992. Second edition 2000.