Environmental water Recovery parameter MIP XAD PAC MC-LR MC-RR MC-YR MC-LR MC-RR MC-YR MC-LR MC-RR MC-YR Lake water Recovery (%) 96 91 93 82 86 77 78 75 77 RSD (%) 3.2 3.7 4.1 5.8 4.9 6.2 6.5 7.2 6.2 Marine water Recovery (%) 89 76 82 73 61 77 68 65 61 RSD (%) 3.5 8.9 5.3 6.4 8.9 7.3 8.3 7.9 8.1 Recovery is based on comparison of peak areas obtained by MC-LR and mixture of MCs by injecting the same amount of cyanotoxin at a concentration of 10 mg L-1.

Table 4: Recoveries of microcytins from the spiked lake and marine waters (n=5).