摘要
为提高KI/KIO_(3)化学曝光剂测量数据的准确性,应用改进的孔式平行光设备,研究了温度、照射时间、可见光、溶液制备过程、搅拌等因素的影响。根据曝光剂的化学反应,从理论上分析了影响的内在原因,且对入射角的影响进行了几何光学分析。结果显示,全程伴随空白样品方法,可有效消除溶液自身不稳定性带来的误差;配制溶液时先溶解四硼酸钠,可提高溶液自身稳定性;溶液的254nm紫外线的透光率仅为0.56%(5mm),需要通过搅拌使离子充分地扩散;溶液的三碘阴离子I3-存在浓度饱和阈值(0.001672 mol×L^(-1)),表明测量时需根据溶液体积选择适当的剂量。上述方法可去除所有因素导致的误差。
In order to improve and ensure the accuracy of the measurement data of KI/KIO_(3) chemical actinometer,the influences of temperature,time,visible light,solution preparation process,stirring,solution concentration and other factors were studied using the improved aperture-type Collimated Beam Apparatus.According to the chemical reaction of the chemical actinometer,the internal reason of the influence was analyzed theoretically,and the influence of the incident angle was analyzed by geometrical optics.The results show that the blank sample method can effectively eliminate the error caused by the instability of the solution during the whole process.The stability of the solution could be improved by dissolving sodium tetraborate first when preparing solution.The light transmittance of the solution was only 0.56%,and stirring could make the ions diffuse better.The solution’s I3-had a concentration saturation threshold of 0.001672 mol×L^(-1),indicating that the appropriate UV dose should be selected when measuring.The error elimination method proposed could theoretically eliminate all influences including currently unknown factors.
作者
宋叶叶
张连峰
童张法
黄煜
SONG Ye-ye;ZHANG Lian-feng;TONG Zhang-fa;HUANG Yu(School of Chemistry and Chemical Engineering,Guangxi University,Nanning 530004,China;Laboratory of Ecology and Environmental Protection,Research Institute of Tsinghua University in Shenzhen,Shenzhen 518057,China)
出处
《高校化学工程学报》
EI
CAS
CSCD
北大核心
2021年第2期372-379,共8页
Journal of Chemical Engineering of Chinese Universities
基金
深圳市科技计划项目(JCYJ20180306170551939)。
