イオン選択性電極によるセラミックス中のナトリウムの定量

概要

論文の詳細を見る
A method has been developed for the determination of sodium content of ceramics using a sodium-ion responsive glass electrode.Procedure: Transfer about 0.05-0.5g ground samples into a platinum dish. Add 0.5ml water as a wetting agent. Then add 2ml HClO4 and 10ml hydrofluoric acid, and heat the dish on a sand bath. Cool the dish add 5ml HCl and water, and warm it on a steam bath to dissolve salts. Transfer to a 100ml volumetric flask and made it up to 100ml with water.To ensure that the ionic strength and pH of the solution remained constant, 20ml of sample solution were mixed with 20ml of the buffer solution. The electrodes were placed into the solution and the sodium ion activity was measured.The concentration of sodium ion was determined from the calibration curve obtained previously and the percentage of sodium oxide in ceramics was calculated.The results of the developed method for various ceramics were compared with the results of flame-photometric method and these two results were in good agreement.The standard deviation of determination was 0.04% for the content of Na2O 13.7%.
社団法人日本セラミックス協会の論文
1972-11-01