The chromatographic conditions were as follows: 21 mobile phase, pure water; flow-rate, 1.0 ml min ; column temperature, 35 8C; FID temperature, 350 8C.
The chromatographic conditions were as follows: 21 mobile phase, pure water; flow-rate, 1.0 ml min ;column temperature, 35 8C; FID temperature, 350 8C.