In the first methods
the sample is oxidized
by combustion in a
bomb containing oxygen
under pressure. The chlorine
compounds thus liberated are
absorbed in a sodium carbonate solution and
the amount of chlorine
present is determined gravimetrically
by precipitation as
silver chloride.
With the second method, the sample, dissolved in a low
boiling hydrocarbon mixture, is boiled under reflux with metallic sodium and
n-butyl alcohol. Under these
conditions the chlorine is converted
to sodium chloride which is then
extracted with water. The chloride in
the extract is determined
volumetrically by titration
with silver in the presence
of thiocyanate.
