<p>This invention provides a method of analysing the contents of a pressurised container, such as a pressurised metered dose inhaler canister. This method comprises the steps of: enclosing said container in a pressure vessel and then pressurising the pressure vessel with a non- reactive fluid. The pressurised container within the pressure vessel is then pierced and the contents removed and analysed. The invention also consists of a device to carry out such a method.</p>
