Analysis of Some Aromatic Amines by Means of Derivative Spectrophotometry

Abstract

Derivative spectrophotometry (DS) was applied for the determination of selected aromatic amines in two-compound mixtures. Following pairs were analysed: o- and m-toluidine, o- and p-toluidine, m- and p-toluidine; o- and m-phenylenediamine (PDA), o- and p-PDA, m- and p-PDA; p,p'-diaminodiphenylmethane (DADPMe) and p-toluidine. The developed method of DS was used as a complementary technique to HPLC with DAD detector as it allows the determination of compounds, which give a common peak in a chromatographic system.

Adsorption and photodegradation of Procion yellow H-EXL dye in textile wastewater over TiO2 suspension

“…Reactive dyes, including azo dyes, are extensively used in the last few years due to their superior performance, but they are environmentally extremely hazardous because of the toxicity that many of them exhibit. They are representing a class of organic pollutants which are proven to be potentially carcinogenic (Baranowska et al 2002;Garcia-Montano et al 2006). The traditional treatment technologies applied in dye wastewaters treatment, such as coagulation/flocculation, membrane separation or activated carbon adsorption, only do a phase transfer of the pollutant (Vandevivere et al 1998).…”

Photocatalytic decoloration of water-soluble azo dyes by reduction based on bisulfite-mediated borohydride

“…Tighter restrictions on wastewater discharges are forcing textile processors to reuse process water. Azo dyes representing a class of organic pollutants whose associated color in wastewater is quite noticeable to the public, and some azo dyes are proven to be potentially carcinogenic and/or teratogenic on public health [1,2]. Water-soluble azo dyes are generally considered as the most difficult to remove or degrade from the dyeing effluent, due to their high stability and composition ratio of aromatic rings present in their molecule structure.…”

Comparison of continuous‐flow microextraction and static liquid‐phase microextraction for the determination of p‐toluidine in Chlamydomonas reinhardtii

“…In the study of environmental behavior, it is necessary that simple and sensitive methods be developed to determine aromatic amines in environmental matrices [2 -5]. HPLC [6], GC [7,8], colorimetry [9], TLC [10], and spectrophotometry [11] are often used for the analysis of aromatic amines. Among them, HPLC can offer high sensitivity and selectivity to detect aromatic amines in complicated environmental samples.…”