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Abstract
A liquid chromatographic-atmospheric pressure ionization ion spray method for the determination of anatoxin-a, microcystin desmethyl-3-RR, LR, RR and YR in water, is described. The method involves no sample pre-filtration to separate cyanobacteria from the water. The water sample was added to sodium 1-heptanesulfonate and cleaned-up using LMS solid phase extraction columns. The method is simple, specific, and requires small quantities of chemical reagents. The lower limits of quantification were 0.4 μg/L for anatoxin-a, microcystin desmethyl-3-RR and RR, and 0.5 μg/L for LR and YR.
ACKNOWLEDGEMENT
We are grateful to Dr. Hans Utkilen, National Institute of Public Health, for providing the D-3 standard.