Original scientific paper
Validation of analitical method for determination of iron ions on cotton materials
Petra Mihovilović
; University of Zagreb Faculty of Textile Technology, Zagreb, Croatia
*
Branka Vojnović
; University of Zagreb Faculty of Textile Technology, Zagreb, Croatia
* Corresponding author.
Abstract
Metal ion that remain on cotton materials during the production and finishing process of textiles cause damage. This is particulary pronounced if textile comes into contect with oxidising agents, such as hydrogen peroxide. The residual iron ions lead to the catalytic decomposition of H2O2 and the formation of hydroxyl radicals, which cause the cellulose to break down. The textile material loses its strength and dimensional stability resulting in degradation. To minimise the undesirable effects, it is necessary to monitor the concentration of iron ions on the textile material. The quantification of iron ions can be carried out using various instrumental techniques (UV/Vis spectrophotometry, ICP-OES, ICP-MS, AAS, GF-AAS, etc.). In this research, the advantage was given to UV/Vis spectrophotometry as a fast, simple and economically viable method. The content of iron ions on textiles after wet digestion was monitored spectrophotometrically using 3-(2-pyridyl)-5,6-bis-(phenylsulfonic acid)1,2,4-triazine disodium salt (Spectroquant®) as a specific reagent whose complex absorbs at 565 nm. The selected method was developed as an in-house method. Therefore, the validation was performed by determining the following performance characteristics: linearity, working range, sensitivity, selectivity, precision, accuracy, limit of quantification and detection, robustness and the cost of the method was estimated.
Keywords
iron; cotton; wet digestion; UV/Vis spectrophotometry; method development; validation
Hrčak ID:
346767
URI
Publication date:
4.12.2024.
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