本文拟定了一个催化光度法测定痕量锰的新方法，该法基于在ＰＨ＝５．４的酸性介质中，以氨三乙酸为活化剂，锰催化高碘酸钾氧化麝兰的反应，研究了催化光度法测定痕量锰的新的指示反应体系，其检出限为０．０１１ｎｇ／ｍｌ，线性范围为０．２～２．０ｎｇ／ｍｌ，直接用于头发、人尿中锰的测定，获得满意结果。 A new method for the determination of trace manganese by catalytic spectrophotometry was developed in this paper. The method was based on the catalytic oxidation of potassium periodate to the oxidation of muskranthin by ammonium triacetate as an activator in an acidic medium at pH 5.4. A new indicator reaction system for the determination of trace manganese by catalytic spectrophotometry was developed. The detection limit was 0.011ng / ml and the linear range was 0.2 ~ 2.0ng / ml, which was directly used for the determination of manganese in hair and human urine , Get satisfactory results.