Fig. 8.

(a) Semi-log calibration curves of LPG-A (orange), LPG-B (blue) and LPG-C (grey), obtained from the respective sensorgrams of Fig. 7. Each concentration of CRP (circles) is expressed in terms of the mean value and the respective standard deviation within 20 measurements showed for LPG-A (black error bars). The dashed curves (orange for LPG-A, blue for LPG-B and grey for LPG-C) represent the fitting of the experimental data by using the Logistic function. (b) Comparative histogram of the results attained for the detection of CRP with two independent and repeated experiments using LPG-B (blue) and LPG-C (grey). Each column represents the mean value of the signal, together with the respective standard deviation within 20 measurements (black error bars). (For interpretation of the references to color in this figure legend, the reader is referred to the Web version of this article.)