Simple and multiple gas microintroductors for adsorption studies

An improved microintroductor is described which enables measured volumes of gas from 0.2-50 mm 3 or more to be introduced into an apparatus at a low pressure. Several microintroductors can be combined together with an important reduction in complication. These simple and multiple microintroductors, using the mercury cut-off principle throughout, allow very pure gases to be handled without risk of contamination. They are well adapted for adsorption studies on evaporated films.