Aqueous ruthenium was detected in real-time at ambient condition using Microwave-assisted Laser Induced Breakdown Spectroscopy (MW-LIBS). A 10mJ laser energy and 750W microwave power were directed at an open liquid jet sample of ruthenium. It was observed, for liquid flow, the coupling efficiency between the microwave and the laser-induced plasma was limited to 43%. The ruthenium’s signal-to-noise ratio improvement for MW-LIBS, with respect to LIBS, was 76-fold. Based on MW-LIBS, the limit of detection (LoD) for Aqueous ruthenium was determined to be 957±84 ppb.