Open AccessSpectrophotometric Determination of The Complexation of Heavy Metal Ion with Organic Reagent
Author(s) -
Shaimaa Hassan Mallah
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1294/5/052071
Subject(s) - molar absorptivity , reagent , copper , chemistry , metal ions in aqueous solution , calibration curve , stoichiometry , metal , absorption (acoustics) , yield (engineering) , inorganic chemistry , analytical chemistry (journal) , chromatography , detection limit , materials science , organic chemistry , physics , optics , metallurgy , composite material
A simple, accurate, sensitive, and rapid spectrophotometric method have been developed for the direct estimation of copper (II) using 3-(4′-Antipyriyl azo)-1-Nitroso-2-naphthol (APANN) as a new reagent. The methods are based on complexation reaction between copper (II) and APANN at pH 8.5. The complex has a maximum absorption at 430.5 nm. Various factors to yield maximum absorption and sensitivity have been studied and optimized. The calibration graph is linear over the concentration ranges of (0.1– 2.5 μg. mL −1 ) with apparent molar absorptivity values of 1.83 × 10 4 L. mol −1 . cm −1 . The stoichiometry between copper (II) and APANN was found as 1:2. The method developed was successfully applied to the analysis of tea leaves samples without any preliminary concentration or separation. The effect of interferences such as cations, anions was also studied.