MC-LR spiked in DD H2O (µg/L) (9 mL) Blank (DD H2O) (9 ml) MC-LR Recovery without liquid partitioning (µg/L) MC-LR Recovery after liquid partitioning (µg/L) Percentage difference in recovery efficiencies (%)
  15.0   ND 13.739 ± 0.125
(90.83%)
13.486 ± 0.107
(89.90%),
  0.93
  10.0   ND 9.185 ± 0.116
(91.85%)
9.468 ± 0.095
(94.68%)
  2.83
  5.0   ND 4.178 ± 0.086
(83.56%)
4.117 ± 0.099
(82.34%)
  1.22
  2.5   ND 2.199 ± 0.027
(87.95%)
2.141 ± 0.112
(85.65%)
   2.30
Key: ND: Not Detected
Table 2b: Comparative recovery of spiked MC-LR in double distilled water using Oasis Waters® HLB SPE cartridges with and without liquid partitioning (Recoveries are
mean values of n=3 and the average % recoveries are shown in brackets).