Extraction, scrubbing, and stripping of Pt(IV) in microfluidic solvent extraction (microSX) chips were studied using a secondary amine as the extractant Real-time efficiency of phase disengagement was precisely determined. The time-dependant platinum concentration in the aqueous phase could be fitted with a pseudo-first order rate equation for three different organic/aqueous phase ratios (0.6, 2.2, and 5.7) that were achieved using dissimilar channel cross-sections. Extraction equilibrium was achieved within several seconds (2-6 s) in agreement with the fast extraction rate expected for a diffusion-limited ion exchange mechanism and the microscopic dimensions involved. Aqueous phase derived from a precious metals refinery was also extracted successfully, demonstrating that the process is relevant to refinery conditions. Scrubbing reported negligible loss of platinum from the organic phase. Stripping revealed that longer contact times were necessary to achieve equilibrium (similar to 12 s) compared with extraction. Phase disengagement efficiencies were precisely determined for the first time using an online and quantitative approach, revealing up to 2% inefficiency with a slight bias towards the organic phase being lost into the aqueous stream. (C) 2015 Elsevier Ltd. All rights reserved.