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本文研究了催化光度返滴定法测定微量锰的原理，找到最佳实验条件，确立了实验方法。测定波长６２２ｎｍ；反应时间１ｍｉｎ４０ｓ；活化剂ＮＴＡ用量０．６０ｍＬ；ＫＩＯ４与孔雀石绿用量比为１．００∶０．３５；室温下滴定；用ｐＨ＝５．４的乙酸－乙酸钠缓冲溶液控制溶液酸度；测定Ｍｎ２＋的浓度范围为１×１０－７～１×１０－５ｍｏｌ／Ｌ；Ｃｏ２＋、Ｂｉ３＋、Ｃａ２＋、Ａｌ３＋、Ｐｂ２＋、Ｃｕ２＋、Ｚｎ２＋、Ｆｅ２＋、Ｍｇ２＋等离子均不干扰测定。该法具有较高灵敏度和准确度。试用于黄豆和化学试剂ＭｇＳＯ４中锰的测定，结果令人满意。
In this paper, the principle of catalytic photometric back titration of trace manganese was studied, the best experimental conditions were found, and the experimental method was established. Determination of wavelength 622nm; reaction time 1min40s; activator NTA dosage 0.60mL; KIO4 and malachite green ratio was 1.00:0.35; titration at room temperature; pH = 5.4 with acetic acid - sodium acetate buffer solution control The concentration of Mn2 + was determined to be 1 × 10-7 ~ 1 × 10-5mol / L. The determination of Co2 +, Bi3 +, Ca2 +, Al3 +, Pb2 +, Cu2 +, Zn2 +, Fe2 + and Mg2 + did not interfere with the determination. The method has high sensitivity and accuracy. The test was applied to the determination of manganese in soybeans and chemical reagent MgSO4, and the results were satisfactory.