Analysis of Pyrolysates of Potassium Citrate of Different pH Values

In order to investigate the effects of acidity on the pyrolysates of cigarette paper additives,the pyrolysates of potassium citrate solution of pH 3.51,8.36 and 12.14 at 300,600 and 900℃ in air were analyzed with pyrolysis-gas chromatography/mass spectrometry.The results showed that:1) At 300℃,the major pyrolysates were ketones;while at 600℃ and 900℃,the major pyrolysates were ketones,benzenes,phenols,indenes and polycyclic aromatic hydrocarbons.2) At 600℃ and 900℃,the contents of crotonaldehyde,aldehydes,benzenes,indenes and polycyclic aromatic hydrocarbons increased,while those of ketones,furans,phenols decreased with the rise of pH value of solution.