DIRECT SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF ALKYLBENZENESULFONATE WITH 1-(4-N-METHYLPYRIDINIUMAZO)-4-(4-AMINOPHENYLAZO) NAPHTHALENE IODIDE
DIRECT SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF ALKYLBENZENESULFONATE WITH 1-(4-N-METHYLPYRIDINIUMAZO)-4-(4-AMINOPHENYLAZO) NAPHTHALENE IODIDE