Iodometric microgram determination of Mn(II) in aqueous media by an indirect chemical amplification reaction.
A rapid, simple and highly sensitive iodometric amplification method is described for the determination of microgram amounts of Mn(II). The method is based on oxidation of Mn(II) with an excess of periodate in acetate buffer (pH 2.8-3.0), masking of the unreacted periodate with molybdate, and after addition of iodide, titration of the liberated iodine is with thiosulphate. The proposed method offers 20-fold amplification for Mn(II) and was found suitable for the determination of Mn(II) in the presence of permanganate ions. Mn(II) in tap water and an industrial waste water has been successfully determined by the proposed method.
El-Wakil
A M
AM
Department of Chemistry, Faculty of Science, Mansoura University, Mansoura, Egypt.
Farag
A B
AB
El-Shahawi
M S
MS