摘要
采用荧光光度法测定纸中荧光增白剂VBL的含量。样品以pH 8的水为解析液,微波辅助萃取120s。VBL的质量浓度在2.00mg·L-1以内与其荧光强度呈线性关系,检出限(3s/k)为0.001mg·L-1。以学生作业纸样品为基体进行加标回收试验,所得回收率在84.7%~94.9%之间。对同一纸品平行测定5次,测定值的相对标准偏差为3.4%。
Fluorospectrophotometry was applied to the determination of fluorescent whitening agent VBL in paper.The sample was desorbed in water of pH 8,then extracted for 120 swith microwave assistant.Linear relationship between values of fluorescence intensity and mass concentration of VBL was kept in the range within2.00mg·L-1,with detection limit(3s/k)of 0.001mg·L-1.On the base of worksheet sample of student,test for recovery was made by standard addition method,with values of recovery found in the range of 84.7%-94.9%.Precision of the method was tested with paper sample for 5determination,value of RSD found was 3.4%.
出处
《理化检验（化学分册）》
CSCD
北大核心
2015年第2期164-167,共4页
Physical Testing and Chemical Analysis(Part B:Chemical Analysis)
基金
国家自然科学基金(201203087)
河南省教育厅重点基础研究项目(13A150793)
河南省科技厅科技发展项目(122102310333
1223041346)
关键词
荧光光度法
荧光增白剂VBL
纸
Fluorospectrophotometry
Fluorescent whitening agent VBL
Paper
