1.1 ,These test methods describe the determination of the amounts of α,-pinene, β,-pinene, dipentene, terpene alcohols, and other terpene compounds in turpentine and related terpene products using capillary gas chromatography. The two methods for determining the amount of the individual terpene compounds are the “,internal standard”, method, which yields absolute values, and the “,area percent”, method, which yields relative values.