Fig. 4

Detection of BDA as 2,4-dinitrophenylhydrazone: a analysis of authentic BDA–DNPH, b analysis of BDA formed in model reactions. The upper figures display UV spectra of peaks a’ and b’
Detection of BDA as 2,4-dinitrophenylhydrazone: a analysis of authentic BDA–DNPH, b analysis of BDA formed in model reactions. The upper figures display UV spectra of peaks a’ and b’