关键词：
二溴羟基苯基荧光酮;微孔滤膜;分光光度法;锰
摘 要：
锰(Ⅱ)与二溴羟基苯基荧光酮(DBHPF)和溴化十六烷基三甲铵(CTMAB)形成的配合物,通过微孔滤膜富集,用二甲亚砜将滤膜及配合物溶解,在分光光度计上测定吸光度的一种快速富集测定微量锰的方法。配合物最大吸收波长为592nm,表观摩尔吸光系数ε592=4.70×105L·mol-1·cm-1,锰含量在0～12μg/5ml范围符合比尔定律,用于粮食中锰的测定,结果满意。
译 名：
Spectrophotometric Determination of Trace Manganese in Food by Dissolving the Filter Membranes
关键词：
trihydroxy-9-(3,5-dibromo-4-hydroxy)phenylf-luorone-3 Microfilter membrane Spectrophotometric method Manganese
摘 要：
A new preconcentration and determination method of manganese was studied. The complex of Mn-DBHPF-CTMAB and the microfilter membrane were dissolved in DMSO. The manganese was determined. The maximum absorption was observed at 592 nm with molar absorptivity 4.70×105L·mol-1·cm-1.For manganese content within 0～12μg/5ml,Beer's Law is conformed. This method has high sensitivity. Satisfactory results were obtained for the determination of trace manganese in food.
