b'2 0 2 1T E C H N O LO G YT R A N S F E R A N N U A L R E P O R TPatent 11,035,023 Patent 11,054,481Reactor Systems For Recovering Metals, Multispectral Impedance Determination And Related Methods Under Dynamic Load ConditionsA method of recovering metals from electronic wasteImpedance testing devices, circuits, systems, and comprises providing a powder comprising electronicrelated methods are disclosed. A Device Under Test waste in at least a first reactor and a second reactor and(DUT) is excited with a multispectral excitation signal providing an electrolyte comprising at least ferric ionsfor an excitation time period while the DUT is under in an electrochemical cell in fluid communication witha load condition from a load operably coupled to the the first reactor and the second reactor. The methodDUT. A response of the DUT is sampled over a sample further includes contacting the powders within thetime period. The sample time period is configured such first reactor and the second reactor with the electrolytethat it includes an in-band interval during the excitation to dissolve at least one base metal from each reactortime period and one or more out-of-band intervals into the electrolyte and reduce at least some of theoutside of the in-band interval. A response of the DUT ferric ions to ferrous ions. The ferrous ions are oxidizedto the load condition during the in-band interval is at an anode of the electrochemical cell to regenerateestimated by analyzing samples of the response from the ferric ions. The powder within the second reactorone or more out-of-band intervals. Adjusted samples comprises a higher weight percent of at least one baseare computed by subtracting the estimated load metal than the powder in the first reactor. Additionalresponse during the in-band interval from the samples methods of recovering metals from electronic waste arefrom the in-band interval. An impedance of the DUT is also described, as well as an apparatus of recoveringestimated by analyzing the adjusted samples.metals from electronic waste.Patent 11,054,481 granted 7/6/2021 to Jon P. Christophersen,Patent 11,035,023 granted 6/15/2021 to Tedd E. Lister, Jacob A. Parkman,John L. Morrison, William MorrisonLuis A. Diaz Aldana, Gemma Clark, Eric J. Dufek, Philip Keller8'