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).

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