Spectrophotometric Determination of Hydrogen Peroxide with 2-(5-Bromo-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol-molybdenum(VI), or 2-(5-Nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol-vanadium(V) in the Presence or Absence of Surfactant

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Abstract
A spectrophotometric determination of hydrogen peroxide (H2O2) was proposed with 2-(5-bromo-2-pyridylazo)-5-(N-pro-pyl-N-sulfopropylamino)phenol(5-Br.PAPS)-molybdenum(VI) complex at pH 1.9, 2-(5-nitro-2-pyridylazo)-5-(N-propyl-N-sulfopropylamino)phenol (5-NO2. PAPS)-vanadium(V) complex at pH 0.9 or 6.2 in the presence of anionic or cationic surfactant, sodium dodecylbenzenesulfonate (SDBS) or hexadecyltrimethylammonium chloride (HTAC). The calibration curves were linear in the range of 0–2.5 × 10−5 M(0–8.5 μg/10 ml) H2O2 or 0–2.0 × 10−5 M(0–6.8 μg/10 ml) H2O2 with apparent molar absorptivities (∊) 4.6 × 10−4 1 mol−1 cm−1 at 640 nm(5-Br.PAPS-molybdenum(VI) complex), 7.7 × 10−4 1 mol−1 cm−1 at 600 nm(5-NO2. PAPS-vanadium(V)-SDBS complex) and 9.2 × 10−4 1 mol−1 cm−1 at 605 nm(5-NO2 PAPS-vanadium(V)-HTAC complex), respectively.