Since the First Edition of the Hydrocarbon Analysis Manual was published in 1963, there has been a large increase in the number of analytical methods considered by ASTM Technical Committees. A review of the list of new methods included in this edition gives a good indication as to where the emphasis on hydrocarbon analysis is being placed. Of the 28 new methods included 15 are gas chromatography and 7 are mass spectrometry. Because of the increased number of Chromatographic instruments in laboratories throughout the country and the relative simplicity of the methods, this analytical tool is being used more frequently for hydrocarbon analysis than any other.