Three green (eco-friendly), inexpensive and simple spectrophotometric methods for quetiapine fumarate (QTF) analysis have been developed and validated.Method I is based on the measurement of the oxidation product of QTF at 610 nm after the reaction with potassium permanganate.Potassium permanganate was used as oxidant.Method II depends on oxidation of the cited drug with ceric ammonium sulfate whe...