1THE ACCURATE MEASUREMENT of oxalate concentration in urine presents considerable difficulties. The methods available in the literature are based upon either the direct formation of calcium oxalate precipitate and subsequent oxidimetric titration (1-3) or upon a preliminary ether extraction followed by a titrimetric procedure (4, .5). In a more elaborate method, the extraction with ether is com...

In this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of pH  .This constant range of pH was achieved by using concentrated soduim silicate solutions as pH adjusting solutions during titration.The sodium silicate solutions  having a variety of...

in this study, alkaline colloidal silica was prepared by titration of an alkaline solution such as sodium silicate with silicic acid in constant range of ph  .this constant range of ph was achieved by using concentrated soduim silicate solutions as ph adjusting solutions during titration.the sodium silicate solutions  having a variety of concentrations were passed  through ion-exchange resin to...

INTRODUCTION The combination of sodium hypochlorite (NaOCl) and chlorhexidine (CHX) results in the formation of a precipitate. In a previous study, we demonstrated the formation of 4-chloraniline (PCA) in the precipitate in an amount directly related to the concentration of NaOCl used. AIMS AND METHODS The aim of the present study was to use a diazotization technique to confirm the presence o...

In a comparative study of urinary calcium methods, many of the recently proposed procedures proved either impractical or invalidin our hands. A preliminary isolation of the calcium as the oxalate, followed by perchloric acid oxidation of the oxalate seemed to be the simplest procedure whereby urinary calcium could be put in a state suitable for chelometric titration. The isolated calcium could ...