This invention relates to a method and system for measuring concentrations of total recoverable metals in fluids in real time. The method employs microfluidics channels with electrically actuated valves and pumps. The method employs on board pumps to draw a fluid sample into the device. The method employs logic circuits and memory circuits with computer code that control the opening and closing of on-board valves, the turning on and off of on-board pumps, and the direction in which onboard pumps propel fluids. The method employs on-board storage of reagents and, by controlling pumps and valves, mixes reagents with a fluid sample on board the device to prepare the sample for analysis. The method employs electrochemistry with one or more active electrodes, one or more inert electrodes, and one or more reference electrodes to measure concentrations of metals in solution, pH of solution, temperature of solution, and electroconductivity of solution. The method transmits information from the device to remote servers using telecommunications protocols and transceiver devices. The method employs pattern recognition algorithms to identify the correlations between voltage or current measurements on the device and concentrations of metals in the sample in the device. The method employs one or more ultrasonic transducers connected to the microfluidic channels and electrodes used to mix samples with reagents clean the device and maintain its viability.