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
DIRECT SPECTROPHOTOMETRIC METHOD FOR THE DETERMINATION OF ALKYLBENZENESULFONATE WITH 1-(4-<i>N</i>-METHYLPYRIDINIUMAZO)-4-(4-AMINOPHENYLAZO) NAPHTHALENE IODIDE
A new reagent, 1-(4-N-methylpyridiniumazo)-4-(4-aminophenylazo) naphthalene iodide, can react with sodium alkylbenzenesulfonate to show a color change in an aqueous medium. The calibration graph is straight line over the range from 8×10−6 to 3.0×10−5 M of sodium dodecylbenzenesulfonate. The practical molar absorptivity is 1.8×104 1 mol−1 cm−1 at 594 nm.
Spectrophotometric Determination of Sodium 4-Dodecylbenzenesulfonate with 1-(<i>N</i>-Methylpyridinium-4-yl-azo)-4-(4-diethylaminophenylazo)naphthalene Iodide
A new reagent, 1-(N-methylpyridinium-4-yl-azo)-4-(4-diethylaminophenylazo)naphthalene iodide, can react with sodium 4-dodecylbenzenesulfonate to show a color change in an aqueous phase in the presence of iodide ion. The calibration graph is straight line up to 1.2×10−5 M (1 M=1 mol dm−3); ε=3.25×104 1 mol−1 cm−1 at 580 nm.