Determination of small amounts of carbon monoxide in air by various reference methods.

This work was undertaken to insul'e satisfactory accuracy of analytical results obtained by var ious laboratories using diffcrent fundamcntall'cference methods for the determination of small amounts of carbon monoxide in ail' . As these reference methods are used to es tablish th e composition of atmospheres in many researches dealing with th e hazards, detection, and estimation o f carbon monoxide, it is obviously necessary that essential agreement should exist between th e d ifferent methods and the difI'eren t laboratories engaged in u ch work. The cooperative analyses of identical samples has always been the most direct and successful way of m easuring sigllificant disagreement between differen t laboratori es and different m ethods and of ul timately establishing satisfactory agreement. This approach was used in th e present instance.