Allergens Exposure Assessment
CONTACT DERMATITIS, FIFTH EDITION(2011)
Abstract
Many allergens are widely used in both environmental and occupational products. In many cases, it is difficult to know all
the ingredients of a product since most products are not sufficiently labelled. To diagnose and prevent allergic contact dermatitis,
the demonstration of allergens in the products from the patient´s environment is important. Chemical analysis of a product
can make it possible to demonstrate the presence or absence of known allergens. Simple spot tests or documented analytical
methods such as thin-layer chromatography (TLC), high-performance liquid chromatography (HPLC), gas chromatography (GC), atomic
absorption spectrophotometry (AAS) and inductively coupled plasma –mass spectrometry (ICP-MS) can be used. Moreover, with
chemical methods, the purity of a substance can be checked and new allergens can be isolated and identified. Advanced methods
such as mass spectrometry (MS), nuclear magnetic resonance spectroscopy (NMR) and infrared spectrophotometry (IR) are often
required to identify isolated allergens.
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