Soda-lime-silica glass, aqueous

Aqueous corrosion profiles have also been measured on soda-lime-silica glasses using SIMS.(18) Both negative and positive oxygen primary ions were used for sputtering in combination with a metal diaphragm to minimize charging. 

EP Soda-lime silica glass with high hydrolytic resistance resulting from suitable treatment of the surface. These containers are suitable for acidic and neutral aqueous preparations for parenteral use. ... 

The alkali silicate glasses are easily corroded by aqueous acids and the main reaction is an exchange between H3O+ of the solution with the alkali M+ of the glass the corrosion rate increaseswith the ionic radii ofM+, that is, K > Na" " > Li" ". The chemical durability is greatly increased by addition of divalent CaO or trivalent AI2O3 oxides, leading to commercial soda-lime-silica compositions. 

Open-tubular column Soda-lime glass capillaries were treated with a sodium hydroxide aqueous solution at 45-50 "C for 2 days and washed with methanol until the effluent became neutral. The capillaries were then dried under helium at 120 "C for a few hours and washed with methanollc 0.01 H hydrochloric acid, water and methanol. Finally, the capillaries were dried mder helium at 120 °C for a few hours. Chemically and physically stable silica gel layer was formed on the glass surface with above pretreatments. An orgwic solution of octadecyltriethoxysilane was filled into the pretreated capillaries and the reaction weis carried out at elevated temperature. After the reaction, columns were washed with orgcuiic solvents and the mobile phase. Both ends of columns were inserted into narrow-bore(ca. 0.2 mm i.d.) PTFE tubing for small dead-volume connection. 

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