【摘要】 研究了溶液酸度、光强度、光照时间及显色剂用量对Fe(Ⅲ)-PAR络合物光还原反应的影响。在pH 4.5 HAc-NaAc缓冲溶液中,PAR溶液浓度为1.11×10-3mol/L,250 W荧光高压汞灯照射40 min,Fe(Ⅲ)-PAR络合物光还原反应可趋于完全,据此建立光还原代替化学还原测定微量铁的新方法,该方法用于食用菌中微量铁的测定。更多还原

【Abstract】 The effects of solution acidity,light intensity,illuminating time and PAR amount on the photoreduction of Fe（Ⅲ）-PAR complex were studied.The results showed that in a HAc-NaAc buffer solution（pH 4.5） with the concentration of PAR 1.11×10^-3 mol/L,Fe（Ⅲ）-PAR complex,which was illuminated by the high-pressure fluorescent Hg-lamp（250 W） for 20 min,could be transformed into Fe（Ⅱ）-PAR complex completely.Based on the results,a new photoreduction method was developed to hopefully substitute the traditional chemistry reduction method for the determination of micro-iron.The new method was applied successfully in the determination of micro-iron in the fungus and satisfactory results were obtained.更多还原