A multi-syringe system for spectrophotometric determination of total phosphorus involving in-line digestion is proposed. Sample and
digestion solution were dispensed and directed towards a digestion vessel located inside a domestic microwave oven (MWO) where sample
digestion took place. Afterwards, the digested sample was merged with the necessary reagents for the colorimetric determination based on the
molybdenum blue method. Several digestion conditions were studied regarding composition of digestion solution, digestion time and power
set on theMWO. The system was applied to waste water samples and results shown a good agreement with the reference method. Repeatable
results (R.S.D. < 2.41%) and determination frequency of 12 h−1 were obtained.info:eu-repo/semantics/acceptedVersio
