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- W423773323 abstract "Tap water always contains more than 0.1ppm chlorine for disinfection. The residual chlorine was determined with 2, 7-fluorenediamine(FDA) spectro-photometrically. Ten ml of the sample water, which contained less than 1.5ppm chlorine, was transferred to a 15ml test tube with a ground stopper. One ml of 2M nitric acid and 1ml of 40mg/l FDA solution were added and shaken. After 3min the absorbance was measured at 422nm. The calibration curve showed a straight line which passed through the origin and the molar extinction coefficient was 5.1×104l mol-1 cm-1. Coexisting cations and anions in tap water did not interfere with the determination." @default.
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- W423773323 date "1986-01-01" @default.
- W423773323 modified "2023-09-25" @default.
- W423773323 title "Determination of residual chlorine in tap water with 2,7-fluorenediamine." @default.
- W423773323 doi "https://doi.org/10.2116/bunsekikagaku.35.9_835" @default.
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