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Extraction-spectrophotometric study of the system tetrazolium violet(TV)-periodate- water-chloroform

The extraction equilibria in the system tetrzolium violet (TV)-periodate-water-chloroform have been studied by a spectrophotometric method. The distribution constant K D , the extraction constant K e x and the ion-association constant β have been determined. The extracted species has been found to be an ion-association complex containing TV + : IO 4 - = 1:1. The recovery factor has been determined to be R = 90.3%.