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4F - C, S

Accelerator material is added to a 0.2 g sample. The inductive elements of the sample and accelerator couple with the high frequency field of the induction furnace. The pure oxygen environment and the heat generated by this coupling cause the sample to combust. During combustion, carbon-bearing elements are reduced, releasing the carbon, which immediately binds with the oxygen to form CO and CO2, the majority being CO2. A small amount of carbon monoxide is converted to carbon dioxide in the catalytic heater assembly. Sulphur-bearing elements are reduced, releasing sulphur, which binds with oxygen to form SO2. Carbon is measured as carbon dioxide in the IR cell as gases flow through the IR cells, and sulphur is measured as sulphur dioxide in the infrared cell. Both carbon dioxide and sulphur dioxide absorb IR energy at precise wavelengths within the IR spectrum. Energy from the IR source is absorbed as the gas passes through the cell, preventing it from reaching the IR detector. All other IR energy is prevented from reaching the IR detector by a narrow bandpass filter. Because of the filter, the absorption of IR energy can be attributed only to carbon dioxide (CO2) or sulphur dioxide (SO2). The concentration of CO2 and SO2 are each detected as a reduction in the level of energy at the individual detectors. An Eltra CS-800 or CS-2000 is used for the analysis.

Analysis

Method

Reporting Limit

Total C

IR

0.01%

Total S

IR

0.01%


Activation Laboratories Ltd. | 41 Bittern Street, Ancaster, Ontario, L9G 4V5, Canada | TF: +1.888.228.5227
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