アントラセン中の少量のカルバゾールの紫外吸収スペクトルによる定量法

概要

論文の詳細を見る
A method for the determination of a small amount of carbazole in anthracene is studied. The method is based upon the fact that the ultraviolet absorption of anthracene can be removed by the reaction with maleic anhydride to form adduct, which does not show absorption. The procedure is as follows : 50mg of the sample and 250mg of maleic anhydride are dissolved in 7ml of xylene, and then this solution is heated to gentle boiling for 60 minutes. After being cooled to room temperature, the solution is diluted to 25ml with xylene. Maleic anhydride in the solution is removed by extraction with same volume of 0.4mol/l sodium hydroxide aqueous solution, and then the absorbances at 334mμ and 342mμ are measured. Carbazole can be determined by the difference between the absorbances at 334mμ and 342mμ. Unless the amount of impurities in anthracene are not so large, the influences by the presence of impurities are corrected with the use of these procedures.
山梨大学の論文