离子交换树脂比色法测定奶粉中微量铁的研究  

Determination of Micro Amount of Iron in Milk Powder by Ion-Exchange Resin Colorimetry

作　　者：何久康 彭姝丽[1] 

机构地区：[1]内蒙古大学化学系

出　　处：《内蒙古大学学报（自然科学版）》1989年第3期367-370,共4页Journal of Inner Mongolia University：Natural Science Edition

摘　　要：离子交换树脂比色法具有分离、富集低浓度被测元素、灵敏度高,选择性好的优点,本文研究了在表面活性剂TPB存在下5-Br-PADAP与Fe^(2+)反应形成的络合物吸附于强酸型阳离子交换树脂上直接比色法测定铁的条件,通过样品测定,回收率在98％以上,结果满意。A comple formation reaction of iron with 5-Br-PADAP in presence of TPB were studied. This complex can be used to determine iron directly by ion-exchange resin colorimetry. The maximum absorption wavelength is at 560 nm. Beer's law is obeyed for 0~8 μg/25 ml of iron (0.5 cm cell). There is no interference of common ions accompanied with iron in milk powder. The recovery of iron is more than 98%.

关 键 词：奶粉 铁 离了交换树脂 比色法 

分 类 号：TS252.51[轻工技术与工程—农产品加工及贮藏工程]