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The knowledge of the exact oxygen concentration in gaseous and liquid phases is important in most areas of science and industry, especially in biotechnological areas. The fiber optic oxygen measurement system presented was developed, consisting of a hardware optical unit and the sensor (so-called optode), that can replace the commonly used electrodes. No oxygen is consumed during the assay, thus, making optodes an excellent tool for monitoring oxygen in diffusion limited systems.
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Köneke et al. (1999) studied this question.
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