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A novel type of sensor array destined for water analyses is described. The sensor delivers simple on/off patterns of complex ion mixtures. Fluorescent indicators for Ca2+, Na+, Mg2+, SO42-, Cl− and Hg2+ were arranged in microtiterplates and the analytical information was imaged with a CCD camera within microseconds using an intrinsically referencing method.
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Mayr et al. (2002) studied this question.
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