Sequential spectrophotometric determination of paracetamol and p-aminophenol with 2,2 '-(1,4-phenylenedivinylene) bis-8-hydroxyquinoline as a novel coupling reagent after microwave assisted hydrolysis

Filik H., Hayvali M., Kilic E.

ANALYTICA CHIMICA ACTA, cilt.535, sa.1-2, ss.177-182, 2005 (SCI-Expanded) identifier identifier

  • Yayın Türü: Makale / Tam Makale
  • Cilt numarası: 535 Sayı: 1-2
  • Basım Tarihi: 2005
  • Doi Numarası: 10.1016/j.aca.2004.11.058
  • Dergi Adı: ANALYTICA CHIMICA ACTA
  • Derginin Tarandığı İndeksler: Science Citation Index Expanded (SCI-EXPANDED), Scopus
  • Sayfa Sayıları: ss.177-182
  • Anahtar Kelimeler: paracetamol, p-aminophenol, spectrophotometry, 8-hydroxyquinoline, 2,2-(1,4-phenylenedivinylene) bis-8-hydroxyquinoline, FLOW-INJECTION, DRUG FORMULATIONS, ACETAMINOPHEN, SALICYLAMIDE, PHARMACEUTICALS, NITROSATION, OXIDATION
  • Ankara Üniversitesi Adresli: Evet

Özet

A new method to determine paracetamol and p-aminophenol in pharmaceutical products is presented. The purpose of this work is to introduce 2,2'-(1,4-phenylenedivinylene) bis-8-hydroxyquinoline (PBHQ) as a novel coupling agent. This developed method is based on the microwave assisted alkaline hydrolysis of paracetarnol to p-aminophenol, which reacts in mildly alkaline medium with 2,2-(1,4-phenylenedivinylene)bis-8-hydroxyquinoline (PBHQ) as a novel coupling reagent. The formed product shows maximum absorbance at 650 nm with molar absorptivity = 3.4 x 10(4) 1 mol(-1) cm(-1) and the method was linear in the 0.44-5.5 mg l(-1) concentration range. The detection limit value was found to be 0.09 mu g ml(-1). The stoichiometric composition of the dye is 2:1 (PAP:PBHQ). The effect of concentration of reactants and temperature on the coupling reaction was investigated. The proposed method is successfully adopted for the determination of paracetarnol and p-aminophenol in various pharmaceutical preparations. (c) 2004 Elsevier B.V. All rights reserved.