Assay for KANKOH-SO No. 401 by Titration Method by Tetraphenylboron with Bromophenol Blue as an Indicator Reagent

Abstract

A simple and rapid titration method for KANKOH-SO No. 401 has been developed. KANKOH-SO No. 401 reacted with bromophenolblue (BPB) and formed a complex, which was extacted to chloroform. When tetraphenylborone (TPB) was added to this solution, TPB and KANKOH-SO No. 401 interacted quantitatively and BPB was found to be released from chloroform phase to water.
Therefore, condition were established to determine KANKOH-SO No. 401 by titration method with TPB in the presence of small amounts of BPB as an indicator reagent.