【摘要】 基于β－环糊精作增敏剂，锰（Ⅱ）催化高碘酸钾氧化靛红的反应，拟定了测量痕量锰的新催化光度法．由于添加了β－环糊精，灵敏度提高了２１倍（锰含量０～３．２ｎｇ·ｍＬ－１），和５９倍（锰含量３．２～８．８ｎｇ·ｍＬ－１），相对标准偏差为２．５％（ｎ＝１１），检出限为１．１×１０－１０ｇ·ｍＬ－１，可用于铝合金中锰的测定，初步探讨了有关反应机理．更多还原

【Abstract】 A new catalytic spectrophotometric method for the determination of trace amount of Mn(Ⅱ) has been developed. The method is based on the oxidation of indigo carmine(IC) by potassium periodate in the presence of nitrilo triacetic acid as an activator and β cyclodextrin (β CD)as sensitizer.The mechanism of related reaction has been discussed. Because of the addition of β CD,the sensitivity raised 21～59 times. The linear ranges of determination are 0～3.2 ng·mL -1 and 3.2～8.8 ng·mL -1 for Mn(Ⅱ).The detection limit is 1.1×10 -10 g·mL -1 , the ralative standard deviation is 2.5%( n =11). The method can be used for the determination of Mn(Ⅱ)in aluminium alloy samples.更多还原