Example of configuration which is capable to reach this flow rate:
Masterflex® L/S® Digital Drive, Computer-Compatible, 0.02 to 100 rpm; 115/230 VAC - catalog number 07551-30,
Masterflex® L/S® Multichannel Cartridge Pump Head with Reduced Pulsation for Microbore 2-Stop Tubing, 12-Channel, 8-Roller, catalog number 07519-25 with Masterflex® L/S® Small Cartridges, catalog number 07519-85
Masterflex® Ismatec® Pump Tubing, 2-Stop, Tygon® S3™ E-LFL , 0.19 mm ID, 15" L; 12/PK , catalog number 06447-10
With drive speed set to 0.02 rpm, flow rate approx. 0.0026 ml/rev per channel for the 0.19 mm ID tubing using the Multichannel Cartridge Pump Head, we get the flowrate per channel 0.00005 ml/min, i.e. 0.05 µl/min