Com three new silica gel modified with calix4arene

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Unformatted text preview: pectra showed the −1 presence of Tow band at 2941 and 2862 cm which assigned to stretching vibrations of the methyls and −1 methylenes. The bands at 1637, 1470 and 1418 cm refer to aromatic C-C stretch and C-CH bending. −1 The C-C stretching and C-CH bending vibrations observed at 1239 and 1207 cm . The bands at 752 and −1 730 cm are related to aromatic torsion vibrations. SEM and BET analysis have been done to get information about the sample's surface shape and area. ANA-O22 DESIGN OF A BIOSENSOR BASED ON THE FUNGUS LENTINUS SAJOR-CAJU FOR INSECTICIDE PERMETHRIN DETECTION IN TREATED WOOD 1 Mohamad Nasir Mat Arip, Lee Yook Heng, Musa Ahmad and Salmiah Ujang 2 2 1 1 2 Forest Products Division, Forest Research Institute of Malaysia 52110 Kepong, Selangor Malaysia School of Chemical Sciences, Faculty of Science and Technology, Universiti Kebangsaan Malaysia E-mail: mnasir@frim.gov.my The present work describes the development of a biosensor based on the fungus Lentinus Sajor-Caju immobilised in a alginate matrix for the determination of permethrin in treated wood. Fungal cells provide advantages in terms of sensitivity to various toxicants especially on permethrin insecticides as it can degrade specifically permethrin to produce acidic products that can be detected by potentiometric devices. The potentiometric biosensor developed was able to detect permethrin over the range of 1 100 mg/L and the slope of the response was close to theoretical Nernstian value of 51.2 mV/decade. The fungal cells are relatively easy to cultivate, manipulate for sensor configurations and are amenable to other transducer methodologies apart from potentiometric detection. 74 3rd ICYC 2010 Universiti Sains Malaysia ANA-O23 23rd-25th June 2010 STUDY OF THE ADSORPTION BEHAVIOUR OF Cu(II), Pb(II) AND Co(II) ONTO ETHYLENE VINYL ACETATE CLINOPTILOLITE NANOCOMPOSITES T.S. Mthombo, *B.B. Mamba, A.K. Mishra and S.B. Mishra Department of Chemical Technology, University of Johannesburg, P.O Box 17011, Johannesburg 2028, South Africa E-mail: bmamba@uj.ac.za Lead, C...
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