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. Author manuscript; available in PMC: 2020 May 24.
Published in final edited form as: ACS Sens. 2019 Apr 23;4(5):1203–1210. doi: 10.1021/acssensors.8b01453

Table 1.

MC-LR levels of original lake water sample and its MC-LR spiked variants tested by the present SERS method and the commercial ELISA kit.

Sample Spiked [MC-LR] μg/L ELISA μg/L SERS immunoassay μg/L RSD (%) Recovery percentage
Lake+sample 0 0 undetectable 0.03 17 NA
Lake+sample 1 0.21 0.23 0.22 14 105%
Lake+sample 2 0.76 0.73 0.81 8.0 107%
Lake+sample 3 6.10 6.40 6.12 1.8 100%

Note: Lake+sample 0 is the Mystic Lake surface water collected from the Upper Mystic Lake in Massachusetts without the addition of MC-LR; Lake+samples 1, 2 and 3 were generated by spiking with the stock solution of MC-LR into the Mystic Lake water sample; RSD is the relative standard deviation.