Conductivity of flames

An independent study was conducted of flame velocity measurements for a series of additives including some halosilanes and related compounds [222], The Bgure of interest was the volume percent of inhibitor required to reduce the burning velocity of a premixed (stoichiometric) n-hexane flame by 30%. On this basis, it was determined that the flame inhibition activity of SiCl4 (0.56%) was comparable to Brj (0.7%) but considerably more effective than CCI4 (1.38%). 

The columns (1 metre x 4 mm) were operated at lOO C to 200 C with helium as carrier gas and a thermal-conductivity of flame ionisation detector. 

Bortnikov et al have discussed the gas chromatography of alkyl germanium compounds. They determined retention volumes by gas chromatography and heats of dissolution or absorption for the tri- and tetraethyl derivatives of germane on a stainless steel column (1 metre x 3 mm) packed with silanised Chromosorb W supporting 20% of Apiezon L or 15% of Carbowax 20M and operated at 120° or 90 C respectively, with helium as carrier gas and thermal conductivity of flame ionization detection - and by gas-solid chromatography on a column of Carbochrom-1 (graphitised thermal carbon black with 0.01% of Apiezon L) operated at 190°C or Silochrom C-80 (modified with chlorotrimethylsilane, hydroxylated or dehydroxylated) operated at lOO C, 147°C or 203°C respectively. 

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