With triethanolamine as the absorbefacient and parafuchsin as the chromgenic agent, the spectrophotometric determination method of sulfur dioxide in the air is discussed.

• 研究了用三乙醇胺为吸收液 ；盐酸副玫瑰苯胺为显色剂 ；用分光光度法测定大气中二氧化硫的方法 .