The degradation patterns of different toxic organic compounds
were analyzed on HPLC (Shimadzu) with an SPD-10AV UV/Vis
detector at 277 nm and Shim-pack VP-ODS column
(4.5 150 mm diameter, particle size 5 lm; Shimadzu, Kyoto,
Japan). Samples collected for HPLC analysis were acidified with
phosphoric acid (10%, wv1) to stop the biological reaction,
extracted with an equal volume of 1:1 (v v1) ethyl acetate, shaken
for 3 min, and centrifuged at 8000g for 10 min. The organic layer
was filtered and then analyzed directly by HPLC. Filtered and
degassed mobile phase mixture composed of acetonitrile: water
(4:1) was used as mobile phase at a flow rate of 1.0 ml/min. The
column was maintained at a temperature of 40 C in a thermostat
chamber.