The method, here presented, is based on the findings of Moore and Stein (1) who have shown that, over a broad range, the color produced by the interaction of an improved ninhydrin reagent with a large number of amino acids and peptides conforms with Beer’s law, although all amino acids and peptides do not produce equal color yields. This procedure has been found to be relatively simple, reasona...

Pesticides are used as the main tool for agricultural pest control. Many pesticides are, however, toxic substances and persistent in character. Concern over the pesticide residues in fruits and vegetables have led to the development of many clean up and analysis methods. Biosurfactant was used in this study to explore the possible potential for cleaning up cypermethrin residue. Lettuce was chos...

chloride or cadmium nitrate. However, the complexation was secondary in relation to ninhydrin-amino acid reaction [4]. At the end of the 1990’s, a new component named 1,2-IND (1,2-indanedione) was applied, which reacted with amino acids and with DFO, whereby the reaction product exhibited fluorescent properties [5, 6]. The follow-up scientific activity within this scope was focused on the optim...