Table of Contents
Conference Papers in Materials Science
Volume 2013, Article ID 253913, 5 pages
http://dx.doi.org/10.1155/2013/253913
Conference Paper

A Qualitative Study of Residual Pesticides on Cotton Fibers

1Department of Textile Materials, Technical University of Liberec, Studentská 2, 46117 Liberec, Czech Republic
2BVT Technologies, a.s., Hudcova 78c, 61200 Brno, Czech Republic

Received 1 August 2013; Accepted 16 September 2013

Academic Editors: R. Fangueiro and H. Hong

This Conference Paper is based on a presentation given by Syed Zameer Ul Hassan at “International Conference on Natural Fibers—Sustainable Materials for Advanced Applications 2013” held from 9 June 2013 to 11 June 2013 in Guimarães, Portugal.

Copyright © 2013 Syed Zameer Ul Hassan et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Two different methods are utilized for this study. The first method covers the measurement of bioelectrical signals caused by enzymatic inhibition of acetyl cholinesterase (AChE) for the detection of pesticides. Biosensor toxicity analyzer (BTA) was used for the testing and the monitoring of changes in bioelectrical signals caused by the interaction of biological substances, and residues were evaluated. The second method is based on measurement of the oxygen level caused by photosynthetic inhibition of residual pesticides by the interaction with green algae, Scenedesmus (Chlorophyta). Algae growth analyzer (AGA) equipped with miniature sensitive oxygen electrode, a light source and cover to model light and dark phases was used enabling us to follow the lifecycle of algae producing oxygen. The test, conducted under the guideline of faster analogy of DIN 863 toxicity test, alga growth inhibition test (OECD TG 201) was and ISO standard (ISO: 8692). Two samples of cotton were analyzed. Cryogenic homogenization was carried out for sample pretreatment. Soxhlet extraction method (SOX) and ultrasound assisted extraction (USE) were used for extraction. Both methods show reasonable results and can successfully be utilized for the detection of residual pesticides on different types of cotton and especially to compare the classical conventional and organic cotton.