Fig. 4

Density value of standard ovalbumin (black circle) and ovalbumin extracted from paint adhesive sample (orange and red square) against the sample quantity. The logistic dose-response curve of standard ovalbumin and the interval of detection (ID) are reported. UOD, upper limit of detection; LOD, lower limit of detection. Density values of paint adhesive samples included in the ID are reported in red; those not included in the ID are reported in orange