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Unveiling New Degradation Intermediates/Pathways from the Photocatalytic Degradation of Microcystin-LR
Citation:
Antoniou, M. G., J. A. SHOEMAKER, A. A. DELACRUZ, AND D. D. Dionysiou. Unveiling New Degradation Intermediates/Pathways from the Photocatalytic Degradation of Microcystin-LR. ENVIRONMENTAL SCIENCE AND TECHNOLOGY. John Wiley & Sons, Ltd., Indianapolis, IN, 42(23):8877-8883, (2008).
Impact/Purpose:
The objectives of this study are the following: 1) to determine passive binding of Dynal magnetic beads to natural organic matters 2) to characterize covalently coupled monoclonal antibodies against MC-LR with a solid phase matrix and determine reuse capability 3) to optimize binding and determine recovery rates of MC-LR in spiked water samples using different sample volumes 4) to determine loading capacity of individual variants of MC and mixture of MCs 5) to compare recovery rates of immunomagnetic beads (IMB) and traditional solid phase extraction (SPE) in drinking and surface waters by HPLC with PDA and MS detection
Description:
This study focuses on the identification of reaction intermediates formed during the photocatalytic degradation of the cyanotoxin microcystin-LR with immobilized TiO2 Tphotocatalysts at neutral pH. To differentiate between impurities already existing in the MC-LR standard (assay 96.4%) and the “true” intermediates, the peak criteria as described in a previous publication were applied (peaks must have a signal to noise ratio of 3 and twice the peak area in the treated sample when compared to initial sample) (1).