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- W2045490691 abstract "A green and highly sensitive analytical procedure was developed for the determination of free chlorine in natural waters, based on the reaction with N,N-diethyl-p-phenylenediamine (DPD). The flow system was designed with solenoid micro-pumps in order to improve mixing conditions by pulsed flows and to minimize reagent consumption as well as waste generation. A 100-cm optical path flow cell based on a liquid core waveguide was employed to increase sensitivity. A linear response was observed within the range 10.0 to 100.0 µg L− 1, with the detection limit, coefficient of variation and sampling rate estimated as 6.8 µg L− 1 (99.7% confidence level), 0.9% (n = 20) and 60 determinations per hour, respectively. The consumption of the most toxic reagent (DPD) was reduced 20,000-fold and 30-fold in comparison to the batch method and flow injection with continuous reagent addition, respectively. The results for natural and tap water samples agreed with those obtained by the reference batch spectrophotometric procedure at the 95% confidence level." @default.
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- W2045490691 date "2010-09-01" @default.
- W2045490691 modified "2023-10-15" @default.
- W2045490691 title "An environmentally friendly flow system for high-sensitivity spectrophotometric determination of free chlorine in natural waters" @default.
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- W2045490691 doi "https://doi.org/10.1016/j.microc.2010.02.001" @default.
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