Fig. 4From: Three techniques for the determination of perindopril through derivatization with 4-chloro-7-nitrobenzo-2-oxa-1,3-diazoleExcitation as well as emission spectra of: a, a` Blank NBD-Cl (0.2%;pH 9.0). b, b` PRD reaction product (4.0 μg mL−1), with NBD-Cl (0.2%;pH 9.0)Back to article page