Peruri Veera Satyanarayana

[ 1 ] - Simple spectrophotometric methods for quantification of modafinil using 1,2-naphthoquinone-4-sulphonate and 2,4-dinitrophenol as analytical reagents

Two simple visible spectrophotometric methods are developed and validated for the quantification of modafinil using 1,2-naphthoquinone-4-sulphonic acid (NQS method) and 2,4-dinitrophenol (DNP method) as analytical reagents. The NQS method involves the reaction of modafinil with 1,2-naphthoquinone-4-sulphonate in alkaline medium at room conditions to form a yellow colored product exhibiting maxi...