Fig. 4From: Fluorescence strip sensor for sensitive determination of prometryn in foodsResult after optimization to detect PRO in celery and potato using LFLM strip; (1–9) represents concentration of 0, 0.25, 0.5, 1, 2.5, 5, 10, 25 and 50 ng mL−1 (a). Corresponding quantitative curve of binding rate (T/T0) against concentration of PRO with LFLM strip (b). T/T0 represent ratio of the sample containing PRO sample and sample without PROBack to article page