GENERAL METHODS...........................................................................................................35
Appearance and Physical Properties............................................................................35
Boiling Point and Distillation Range ...............................................................35
Determination of pH (Potentiometric Method)................................................36
Melting Range/Melting Point ..........................................................................38
Refractive Index...............................................................................................38
Solidification Point ..........................................................................................39
Solubility..........................................................................................................41
Specific Gravity ...............................................................................................41
Specific Rotation..............................................................................................43
Identification Tests.......................................................................................................45
Inorganic Ions ..................................................................................................45
Organic Ions and Compounds..........................................................................48
Inorganic Components ................................................................................................51
Acid-Insoluble Matter .....................................................................................51
Arsenic Limit Test ..........................................................................................51
Ash ..................................................................................................................53
Total Ash..............................................................................................53
Acid-insoluble Ash ..............................................................................54
Sulfated Ash ........................................................................................54
Chlorides Limit Test .......................................................................................54
Chromium Limit Test ......................................................................................55
Cyclic Phosphate Determination......................................................................55
Fluoride Limit Test .........................................................................................57
Method I – Thorium Nitrate Colorimetric Method .............................57
Method II – Ion-Selective Electrode Method, Method A ...................58
Method III – Ion-Selective Electrode Method, Method B ..................59
Method IV – Ion-Selective Electrode Method, Method C...................59
Iron Limit Test ................................................................................................61
Loss on Drying.................................................................................................61
Loss on Ignition ..............................................................................................61
Metallic Impurities ..........................................................................................62
Measurement of Antimony, Barium, Cadmium, Chromium, Copper,
Lead and Zinc by Atomic Absorption Flame Technique...............65
Measurement of Antimony, Barium, Cadmium, Chromium, Copper,
Lead and Zinc by Inductively Coupled Plasma Technique ...........66
Measurement of Lead and Cadmium by Atomic Absorption
Electro-Thermal (Furnace) Atomization Technique......................67
Measurement of Arsenic and Antimony by Atomic Absorption
Hydride Technique...............................................................................68
Determination of Mercury by Cold Vapour Atomic Absorption
Technique.......................................................................................68