Lumex Instruments , , Environmental XPRT News Environmental XPRT Downloads premium About Solutions products applications industries services training Publications videos articles Latest news Downloads Home Companies & Suppliers Lumex Instruments Downloads Determination of caffeine, ... Determination of caffeine, ascorbic acid, preservatives (benzoic acid, sorbic acid and their salts), and artificial sweeteners (acesulfame K, saccharine) in soft and strong drinks