Development of spectrophotometric determination method for Au(III) and Ag(I)

Year 2017, Volume: 21 Issue: 2, 319 - 329, 01.04.2017

Gülbin Erdoğan , Emre Dölen Hilmi İbar

https://doi.org/10.12991/marupj.300811

Abstract

In this research, a potentiometric and spectrophotometric method

was developed to determine Ag(I) and Au(III) based on their

reaction with m and p-phenylenediamine. As a result reactions

between Ag(I) and Au(III) and m- and p-phenylenediamine

mixtures was revealed that, there is an oxidation by means of

complexation via oxidation, a diazo compound occured from

amines and Ag(I) was reducted to elementel form, Au(III) was

reducted to Au(I). Also the formation conditions of the reactions

of these metals with amines were investigated, the pH range that

the reactions took place, time needed for the formation of the

reactions and the mol ratios needed for the complete reaction of

the metals with amines. Mole ratios were determined as follows:

Ag(I) / (m+p)phenylenediamine= 1;

Au(III) / (m+p)phenylenediamine= 1/2

Keywords

Spectrophotometer, potentiometer, m- ve pphenylenediamine, Ag(I) and Au(III)

Au(III) için Ag(I) kullanılarak spektrofotometrik bir tayin yönteminin geliştirilmesi

Abstract

Bu araştırmada m- ve p-fenilendiaminlerin tedavi amaçlı

olarak da kullanılan Ag(I) ve Au(III) ile verdiği tepkimeler

spektrofotometrik ve potansiyometrik yöntemler kullanılarak

bir tayin yönteminin geliştirilmesi amaçlanmıştır. m- ve

p-fenilendiamin karışımlarıyla Ag ve Au(III)’ün verdiği

reaksiyonlar sonucunda kompleksleşme üzerinden yürüyen

bir oksidasyon olduğu, bu oksidasyona bağlı olarak aminler

arasında bir diazo bileşiği oluşurken Ag(I)’in elementel hale

Au(III) ün ise Au(I) basamağına indirgendiği görülmüştür.

Ayrıca Ag(I) ile aminlerin verdiği reaksiyonların oluşum

koşulları incelenerek, reaksiyonun meydana geldiği pH aralığı,

reaksiyonların oluşum süreleri ve bu metallerle aminlerin tam

olarak reaksiyona girebilmesi için gerekli olan mol oranları

bulunmuştur. Deney sonuçlarına göre Ag(I) ve Au(III)’ün

aminlerle oluşturdukları oksidatif bağlanma ürünlerinin mol

oranları belirlenmiştir.

Ag(I)/(m+p)fenilendiamin=1 ;

Au(III)/ (m+p)fenilendiamin= 1/2

Anahtar kelimeler: Spektrofotometre,

Keywords

Spektrofotometre, potansiyometre, m- ve p-fenilendiamin, Ag(I), Au(III)

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