Tetrabutylammonium hydroxide in nearly anhydrous isopropyl alcohol solution has a number of advantages over more conventional titrants for very weak acids in nonaqueous solvents. The tetrabutylammonium salts of most weak acids are more soluble in organic solvents than are the corresponding sodium or potassium salts; thus, difficulties due to precipitation are minimized.The titrant can be used with the glass electrode without the pronounced loss in sensitivity in the highly alkaline region which is encountered with titrants containing sodium and potassium. The titrant can be prepared by passing a solution of tetrabutylammonium iodide in isopropyl alcohol through an anion exchange column which has been converted to the hydroxide form with potassium hydroxide.

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