An Evaluation Of The Problem Of The Chemical Analysis Of Trace Colouring Oxides In Optical Glasses

On the basis of actual experience with glass analysis and a realistic appraisal of the total problem the practical detection limits obtainable by different methods of analysis for titanium, vanadium, chromium, manganese, iron, cobalt, nickel, copper, rhodium, palladium, platinum, neodymium and praseodymium are estimated and are found to be higher than desirable in most glasses. In spite of the attendant hazards of recovery and contamination, chemical modification is essential or desirable to achieve satisfactory detection limits by most of the methods considered.