Oxygen flask determination of Chlorine in organic & inorganic compounds
Oxygen Flask Combustion for the determination of halogens and sulphur consists of a combustion procedure followed by appropriate titrimetric determination. The sample is weighed into our unique paper flags and combusted in the presence of oxygen. This process yields the sample into a gaseous form which is then immersed into the absorbent ready for titration.
Exeter Analytical has fully developed UKAS accredited methods to account for interferences in various samples deeming our processes accurate and precise. OFC methods can be used together with CHN analysis to provide a quick and effective method to determine sample purity. In conjunction with mass spectrometry and NMR, data can be used to characterise the compound.
Our procedure uses Cheng’s method for the analysis of Chlorine with variations incorporated into the method for samples containing Metals, Fluorine, Phosphorus, Bromine and Iodine. Samples are combusted using Sodium Hydroxide and Hydrogen Peroxide as the absorbent solution. After standing, propanol is added and further titrated with Mercuric Nitrate solution using Diphenylcarbazone indicator.