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Optical multi-sensor for simultaneous measurement of absorbance,turbidity, and fluorescence of a liquid |
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| Authors: | Reetaleena Rissanen Ilpo Niskanen Jukka Räty Pirjo Kyyrönen Asta Leinonen Risto Myllylä Kai-Erik Peiponen |
| Institution: | 1. Finnish Institute of Occupational Health, FI-53850, Lappeenranta, Finland 2. Thule Institute, University of Oulu, FI-90014, Oulu, Finland 3. CEMIS-OULU, University of Oulu, P. O. Box 51, FI-87101, Kajaani, Finland 4. Optoelectronics and Measurement Techniques Laboratory, University of Oulu, P. O. Box 4500, FIN-90014, Oulu, Finland 5. Institute of Photonics, University of Eastern Finland, P. O. Box 111, FI-80101, Joensuu, Finland |
| Abstract: | We have built a novel optical multi-sensor apparatus (MSA) for the measurement of light absorption, scattering and fluorescence either separately or simultaneous from a liquid. From the measured data it is possible to calculate different optical properties of liquid samples, such as absorbance and turbidity. The MSA is a portable device which is an advantage considering different field applications. The MSA was tested in laboratory conditions using well-known reference liquids. Data obtained with the MSA were compared with data obtained with a commercial spectrophotometer, fluorometer and a nephelometer, respectively. Relatively good correlations between the data of MSA and the three commercial devices were found. It is proposed that MSA is a potential device for monitoring changes of process liquids and liquid products in industry. |
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