| A Scheme for Rapid Analysis of
Enamels and Frits |
S. K. ROY, S. DASGUPTA AND B. C. SINHA
Pages : 107-134
DOI : 10.1080/0371750X.1976.10840873 |
| Abstract |
| A scheme has been worked out for rapid and accurate analysis
of enamels and frits. The scheme enables the determination
of seventeen different constituents from a stock
solution of single decomposition. The stock solution was
prepared by decomposing the sample with hydrofluoric and
sulphuric acids. Lead and barium were separated as sulphates
prior to the determination of other constituents and
then lead sulphate was separated from barium sulphate for
the first time with EDTA at pH 4.3. Different aliquots were
used for determination of sodium and potassium by flame
photometry; cadmium and zinc by polarography and traces
of iron, chromium, nickel, copper, cobalt and manganese
by spectrophotometry. From another aliquot of the stock
solution interfering elements were removed by mercurycathode
electrolysis and then zirconium, aluminium, calcium
and magnesium were determined by complexometric
methods and titanium by the spectrophotometric or polarographic
method. Separate samples were decomposed for
determination of silica by titrimetric potassium silico
fluoride method; boron by indirect complexometric method
and fluorine by lead chlorofluoride or colorimetric method.
The selectivity, applicability and limitations of each
method have been discussed. |
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