“…Various analytical methods have been reported for the determination of phenothiazines. Available techniques include titrimetry (Issa and Mahrous, ; Walash et al ., ), spectrophotometry (Revanasiddappa and Ramappa, ; Kitamura et al ., ; Basavaiah, ), spectrofluorimetry (White et al ., ; Mohamed et al ., ), chemiluminescence (Kojlo et al ., ; Shi et al ., ), electrochemistry (Razola et al ., ; Daniel and Gutz, ; Huang et al ., ), capillary electrophoresis (Wang et al ., ), flow injection (Daniel and Gutz, ; Zhang et al ., ) and HPLC combined with other techniques (Hayen and Karst, ; Pelander et al ., ; Decaestecker et al ., ).…”