We found a matchYour institution may have access to this item. Find your institution then sign in to continue.TitleDirect optical sensors: principles and selected applications.AuthorsGauglitz GPublicationAnalytical and bioanalytical chemistry, 2005, Vol 381, Issue 1, p141ISSN1618-2642Publication typearticleDOI10.1007/s00216-004-2895-4