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- W2954409822 abstract "For a cost-effective survey of water quality in aquifers with a fast chemical response, such as karst aquifers, continuous high-resolution monitoring by an automatic sensor is relevant. We tested the suitability of the s::can UV–visible spectrometer for continuous measuring in a karst environment of the parameters proposed by the probe manufacturer (NO3 and total organic carbon TOC) as well as other parameters, such as total phosphorus (TP). The spectrometer was installed at the Loue Spring (French Jura Mountains), where water was also sampled for chemical analysis of NO3, TOC, and TP at a frequency of 1 to 4 days. A calibration model was developed based on the partial least-squares regression (PLSR) method, applied to the absorption spectra. Our method showed good results. For NO3, both the factory calibration ( $$R^{2} {_{text{VAL}}} = 0.98$$ ) and our calibration model ( $$R^{2} {_{text{VAL}}} = 0.99$$ ) are very good. For TOC, except for a slight underestimation of some peaks, the low and high values are better reproduced by our model developed ( $$R^{2} {_{text{VAL}}} = 0.63$$ , or 0.23 with the factory calibration). For TP, despite a higher background noise, the overall dynamics are well simulated ( $$R^{2} {_{text{VAL}}} = 0.56$$ ). Finally, our results showed that processing the raw data of the spectrum measured by the spectrometer optimizes the high-frequency monitoring of water quality and provides a better prediction of some parameters, as well as giving promising results for the calibration of non-programmed parameters." @default.
- W2954409822 created "2019-07-12" @default.
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- W2954409822 date "2019-04-10" @default.
- W2954409822 modified "2023-10-18" @default.
- W2954409822 title "Optimization of High-Resolution Monitoring of Nutrients and TOC in Karst Waters Using a Partial Least-Squares Regression Model of a UV–Visible Spectrometer" @default.
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- W2954409822 doi "https://doi.org/10.1007/978-3-030-14015-1_13" @default.
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