Combustion Analysis
Used often in pharmaceutical industry
Organic compounds based in Carbon & Hydrogen
Burn compound in excess O2; meas. H2O, CO2 etc.
Gases carried by He stream; basic method meas. C, H, S, N (assume O makes up difference); after weigh, process is done by comp;
Sample completely burnt w/ O2 stream
final products are H2O, CO2, SO2 (meas. w/ infrared absorption); remove from gas stream leaving N (meas. w/ thermal conductivity);
Trad. - H2O, CO2 found thru chem. absorption; Mole. formula found after finding Mr w/ Mass Spectrometer