| Indirect Complexometric Estimation of Boron
and Its Application in Glass, Enamel
and other Ceramic Materials |
B. C. SINHA AND S. K. RoY
Pages : 43-48
DOI : 10.1080/0371750X.1973.10840558 |
| Abstract |
| A simple method for indirect comp/exometric estimation of boron has been worked out
in which boron is precipitated as barium-bora-tartrate at pH 10.0 with excess barium and tartrate
ions and the excess barium is directly titrated at a temperature below 20°C with EDT A using a
sensitive mixed indicator comprising Eriochrome Black T, Titan yellow and Naphtha/green
B. Small amounts of sulphate (5 mg), phosphate (5 mg), chromate (6 mg), silica (3 mg), aluminate
(5 mg) and fluorine (10 mg) do not interfere hut presence of higher amounts of these ions cause
positil·e error due to precipitation of respective barium salts. The interference can, howerer, be
m·oided by precipitating them out with barium chloride prior to the precipitation of boron.
The method has been successfully applied for the estimation of boron in glass and other
complex silicate materials and the results agree well with the standard values. |
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