Chemical composition analysis of germanate glass by alkalimetric titration of germanate mannitol complex

Analytical Chemistry Section, Central Glass and Ceramic Research Institute, Kolkata-700 032, India

E-mail : dipali@cgcri.res.in

Manuscript received 16 September 2005, accepted 22 November 2005

A titrimetric method has been developed for the determination of germanium in glass. Germanium anion in aqueous solution combine with two molecules of mannitol to form a germanate mannitol complex in presence or sufficient mannitol.The complex Is moderately strong acid and germanium can be determined by alkalimetrlc titration. The proposed method is simple, rapid and selective and the method is successfully applied for the determination of germanium in glass.