摘要
依据溴和碘的二阶导数光谱，选择２１７．０ｎｍ的Ｉ－等吸收点波长和２４２．４ｎｍ的Ｉ－吸收峰波长，用于Ｂｒ－和Ｉ－的同时测定。溴和碘标准混合液测定的误差为：Ｂｒ－－０．４８３％～＋０．７１４％；Ｉ－－０．４０５％～＋０．９８３％。对２１种离子做了干扰试验。并测定了食盐样品中Ｉ－和Ｂｒ－的含量。样品中的回收率分别为：Ｂｒ－９７．２％～１０１％；Ｉ－９９．６％～１０２％。
Based on second-derivate spectrum of bromine and iodine. a 217.0 nm wave-length isoabsorption point was selected for I-and a 242.4 nm peak absorption wave-lengthfor Br-to carry out simulaneous determination of these two elements. The error incurred inthe determination of bromine and lodine in a standard mixtore was-0.483%～+0.714%for Br-and-0.405%～+0.983% for I-. Interference tests were done with 21 kind ofelectrolytes and the I-and Br-content in common salf sample determined. The recovery ratefrom the sample was 97.2%～101% for Br-and 96.6%～102% for I-.
出处
《华南农业大学学报》
CAS
CSCD
1994年第1期150-154,共5页
Journal of South China Agricultural University
关键词
二阶导数光谱
碘
溴
食盐
Second-derivate spectrum
Spectrophotometry,Bromide
lodide
Simultaneous determination
