Micro-particles as interfering substances in colorimetric residual chlorine measurement

Regrowth of Escherichia coli in environmental waters after chlorine disinfection: shifts in viability and culturability

“…Then, the absorbance was measured at a wavelength of 510 nm. 29 The chlorine dose was calculated by integrating the area under the chlorine decay curve within each contact time and used to represent the dosage of chlorination (mg min L −1 ).…”