Advanced Microwave Muffle Furnace The new Milestone PYRO is an advanced microwave muffle furnace ashing system of new generation. PYRO perfectly suits several applications including ashing, sulfated ashing, loss on ignition (LOI), residue on ignition (ROI), fusion and generally all high-temperature reactions under controlled conditions. Improving time and throughput with microwave ashing Dry ashing is based on the decomposition of organic material by the action of oxygen at elevated temperatures. Determination of the ash content, whether for process control or as a preparation method for ...