Sensitivity of the second iLAMP. Concentration range of parathion-methyl
standard assayed by the second iLAMP. (A) HNB-visualized. (B) 2.0%
agarose gel electrophoresis, M represented 2000 bp DNA mark, 1 represented
negative control, 9 represented positive control, 2 to 8 respectively
represented 8, 4, 2, 1, 0.5, 0.25, and 0 ng mL–1 parathion-methyl. (C) turbidimeter.