In this paper,a systematic study about the fluorescence spectrum characteristics of fluorescent whitening agent VBL in solution with the different effects,including the pH and solvent,was conducted.The fluorescence qu...In this paper,a systematic study about the fluorescence spectrum characteristics of fluorescent whitening agent VBL in solution with the different effects,including the pH and solvent,was conducted.The fluorescence quantum yields in 25 different solvents were measured by the reference of quinine sulfate.According to these a new fluorescence determinations of the VBL in paper was built.The linear regression equation of the method is IF = 0.82 + 6.18 ×107c(mol/L) with a correlation coefficient(r) of 0.9992.The linear range of the method is from 0 to 2.85×10-6g/mL and the detection limit is 9.59×10-9g/mL.展开更多
以16种中小学生作业本为检测对象,首先以白度颜色测定仪进行荧光白度检测,其次以水为溶剂对其中V B L荧光增白剂进行提取,采用紫外分光光度计进行V B L含量分析。同时,以V B L为标样添加到纸页中,抄造含有不同V B L含量的纸张样品。对...以16种中小学生作业本为检测对象,首先以白度颜色测定仪进行荧光白度检测,其次以水为溶剂对其中V B L荧光增白剂进行提取,采用紫外分光光度计进行V B L含量分析。同时,以V B L为标样添加到纸页中,抄造含有不同V B L含量的纸张样品。对实验所制备的样品经白度颜色测试仪以及紫外分光光度计测试,验证荧光白度与紫外分光光度计的分析吻合程度,也佐证学生作业本中V B L含量的检验结果。结果表明,荧光白度与紫外分光光度分析方法均可测定纸页中VB L的含量。16种试样中全部含有VB L荧光增白剂,VB L含量最高为0.23%,最少为0.05%;荧光白度最大为14.47%,最小为5.32%。展开更多
文摘In this paper,a systematic study about the fluorescence spectrum characteristics of fluorescent whitening agent VBL in solution with the different effects,including the pH and solvent,was conducted.The fluorescence quantum yields in 25 different solvents were measured by the reference of quinine sulfate.According to these a new fluorescence determinations of the VBL in paper was built.The linear regression equation of the method is IF = 0.82 + 6.18 ×107c(mol/L) with a correlation coefficient(r) of 0.9992.The linear range of the method is from 0 to 2.85×10-6g/mL and the detection limit is 9.59×10-9g/mL.
文摘以16种中小学生作业本为检测对象,首先以白度颜色测定仪进行荧光白度检测,其次以水为溶剂对其中V B L荧光增白剂进行提取,采用紫外分光光度计进行V B L含量分析。同时,以V B L为标样添加到纸页中,抄造含有不同V B L含量的纸张样品。对实验所制备的样品经白度颜色测试仪以及紫外分光光度计测试,验证荧光白度与紫外分光光度计的分析吻合程度,也佐证学生作业本中V B L含量的检验结果。结果表明,荧光白度与紫外分光光度分析方法均可测定纸页中VB L的含量。16种试样中全部含有VB L荧光增白剂,VB L含量最高为0.23%,最少为0.05%;荧光白度最大为14.47%,最小为5.32%。
