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Carbon and Sulfur In Inorganic

High tempurature combustion, typically induction, is used to determine carbon and sulfur content in a variety of materials, both organic and inorganic. The sample is accurately weighed and placed in a ceramic crucible or boat, along with combustion accelerators (tungsten, tin, copper and/or iron chip). The crucible is placed in a high temperature induction furnace which is then flooded with oxygen. The furnace is heated to 1370-1425°c causing the combustion of the carbon and sulfur in the sample to form CO, CO2 and SO2. The gases are separated and analyzed by infrared absorption. A heated catalyst (rare earth copper oxide or platinized silica) is used to convert the CO to CO2 prior to detection. The infrared absorption detector measures the absorption of the infrared wavelengths characteristic to CO2 and SO2. The amount of infrared absorption at these wavelengths is compared to a known value based on certified reference material and the weight of the original sample. 

 

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Our technical team was approached by a Fortune 500 company to help them with a Loss on Ignition or LOI/residue reference standard for testing a proprietary material they produce. Their process used a Thermal Gravimetric Analyzer (TGA) and was modified to test their specific materials. Initially we were able to provide them with a reference standard that had somewhat similar properties for them to reference. The company’s product is highly proprietary and initially the customer was apprehensive about sharing further details with our team. Over time, as the customer became more familiar with Alpha Resources® and our personnel, their appreciation for our technical capabilities and confidence grew considerably.