Abstract: The determination of hydrogen content in hydrogen containing silicon oil and polyether silicon oil was conducted with Lunge apparatus,which is originally designed for determination of nitrogen content in organic materials.Its principle is based on the reaction between NaOH and Si-H bond with generation of hydrogen gas and the volume of the hydrogen gas is accurately measured.Then the hydrogen content can be determined via gas equation calculation.The results were compared with that obtained from chemical analysis method and showed that the relative deviation is less than 3.3%,which denotes that the method is satisfactory in practice.

Key words: hydrogen containing silicon oil, polyether silicon oil, Lunge apparatus for nitrogen determination, hydrogen content