Photometric determination of phosphorus in mineralized biodiesel using a micro-flow-batch analyzer with solenoid micro-pumps

► A good alternative for the phosphorus determination in biodiesel was proposed. ► A micro-flow-batch analyzer (μFBA) with solenoid micro-pumps was developed. ► Low-cost, high sampling rate, and reduced reagent consumption was obtained. ► Precision and accuracy compatible with the biodiesel regulations (Brazil, USA, EU).