以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H N...以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H NMR)对目标化合物进行结构表征,并对荧光性能、增白效果、色度指数、表面活性和表面整理作用进行了测试。结果表明:DSD酸-三嗪-四辛基双季铵盐荧光增白剂具有较强的荧光发射性能;对滤纸进行染色增白处理后,白度值由84.58增加至124.81,且滤纸外观更加光滑平整;目标化合物具有表面活性作用,使水溶液的临界胶束浓度为7.68×10^(-3 )mol/L,表面张力为30.81 mN/m。展开更多
建立了高效液相色谱-荧光法同时测定密胺制品中14种荧光增白剂残留量及迁移量的分析方法。将粉碎后的样品提取液,于50℃超声提取60 min,采用OSAKA SODA CAPCELL PAK PFP色谱柱,以流动相进行梯度洗脱,14种荧光增白剂可以较好地分离。研...建立了高效液相色谱-荧光法同时测定密胺制品中14种荧光增白剂残留量及迁移量的分析方法。将粉碎后的样品提取液,于50℃超声提取60 min,采用OSAKA SODA CAPCELL PAK PFP色谱柱,以流动相进行梯度洗脱,14种荧光增白剂可以较好地分离。研究结果表明,14种荧光增白剂在一定质量浓度范围内具有良好的线性关系,相关系数(r)均不低于0.998,检出限为0.01~0.3 mg/kg,定量限为0.03~1.0 mg/kg。在3个加标水平,14种荧光增白剂加标回收率为88.55%~114.23%,相对标准偏差(RSD)为0.28%~8.90%。该法简便快速、灵敏度高,可应用于市售密胺制品中荧光增白剂残留量和迁移量的测定。展开更多
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
文摘以4,4′-二氨基二苯乙烯-2,2′-二磺酸、2,4,6-三氯-1,3,5-三嗪、二辛基甲基叔胺、4-氨基苯甲酸为原料,经过连续缩合反应制备出一种结构新颖的DSD酸-三嗪-四辛基双季铵盐荧光增白剂。采用傅里叶变换红外光谱(FT-IR)和核磁共振氢谱(1 H NMR)对目标化合物进行结构表征,并对荧光性能、增白效果、色度指数、表面活性和表面整理作用进行了测试。结果表明:DSD酸-三嗪-四辛基双季铵盐荧光增白剂具有较强的荧光发射性能;对滤纸进行染色增白处理后,白度值由84.58增加至124.81,且滤纸外观更加光滑平整;目标化合物具有表面活性作用,使水溶液的临界胶束浓度为7.68×10^(-3 )mol/L,表面张力为30.81 mN/m。
文摘建立了高效液相色谱-荧光法同时测定密胺制品中14种荧光增白剂残留量及迁移量的分析方法。将粉碎后的样品提取液,于50℃超声提取60 min,采用OSAKA SODA CAPCELL PAK PFP色谱柱,以流动相进行梯度洗脱,14种荧光增白剂可以较好地分离。研究结果表明,14种荧光增白剂在一定质量浓度范围内具有良好的线性关系,相关系数(r)均不低于0.998,检出限为0.01~0.3 mg/kg,定量限为0.03~1.0 mg/kg。在3个加标水平,14种荧光增白剂加标回收率为88.55%~114.23%,相对标准偏差(RSD)为0.28%~8.90%。该法简便快速、灵敏度高,可应用于市售密胺制品中荧光增白剂残留量和迁移量的测定。
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.