反向离子对色谱法同时测定食品纸塑包材中3种荧光增白剂

建立了超声辅助提取-反相离子对高效液相色谱法同时检测纸塑食品包装材料中3种荧光增白剂:荧光增白剂28(CBS)、荧光增白剂85(VBL)、荧光增白剂220(BBU)的方法。利用单因素试验和正交试验确定3种荧光增白剂的提取条件。该方法具有良好的精密度和准确度,符合常规检测要求。根据离子对试剂的作用原理,将四丁基溴化铵水溶液反向离子对作流动相配合使用,使研究对象中的3种荧光增白剂出峰时间大大延迟,并得以有效分离,提高了检测效率。以校园周边超市出售的奶茶、方便面、奶糖、牛奶等纸塑食品包装材为研究对象,对其中的CBS、VBL、BBU等3种荧光增白剂进行测定,结果 10种样品中均检出BBU,未检出CBS,7种样品中检出VBL。     

不同白度测试仪器在荧光增白剂增白性能评价上的差异

此文选用不同色谱纯度的荧光增白剂C.I.220（APC）,分别采用染纸和染布两种方法来评价其增白性能.采用分光测色仪、色差计和白度仪中的相应白度指标对被增白的纸张和棉布进行测试,通过对实验数据的分析,发现分光测色仪是评价荧光增白剂增白性能的适宜仪器,对纸张来说应用白度指标来衡量荧光增白剂的增白性能更适宜,对于棉布来说应用白度和增白强度来衡量荧光增白剂的增白性能均适宜,对于APC来说,染纸法更适宜于评价其产品应用性能.     

荧光增白剂VBL的高效液相色谱法定量分析

本文建立了高效液相色谱(HPLC)定量分析荧光增白剂VBL含量的方法。通过对色谱条件的优化,实现荧光增白剂VBL与其杂质良好分离,并采用外标法对荧光增白剂VBL的含量进行测定。     

新荧光增白剂BBU用量与助剂的配伍性研究

新荧光增白剂BBU广泛用于棉纤维、粘胶纤维的增白,根据现有的条件介绍新荧光增白剂BBU特点性能进行实验,探讨160×80,50×50平纹全棉丝光白布,在使用新荧光增白剂BBU用量与白度、色光、水洗牢度的变化关系,研究与现阶段使用酸、渗透剂的配伍性,为改善工艺提供依据。     

高效液相色谱法和紫外分光光度法测定二硫氰基甲烷含量的比较研究

比较了高效液相色谱法(HPLC)和紫外分光光度法(UV)测定二硫氰基甲烷含量的结果.结果显示,UV测定二硫氰基甲烷样品含量均值为96.01%,相对标准偏差RSD为0.18%;HPLC法测定同批次样品均值为95.61%,相对标准偏差RSD为O.12%.配对t检验统计结果表明HPLC和UV法的结果没有显著性差异,两种方法均可作为二硫氰基甲烷含量的测定方法.     

纸中荧光增白剂VBL的光老化规律研究

为解决涉案纸张物证老化时间的鉴定问题，本文通过液相色谱-荧光检测器和白度仪对打印纸中荧光增白剂VBL含量及纸张白度值进行了研究。结果表明，不同打印纸中VBL含量及白度值随纸张老化呈下降趋势。重现性实验表明，VBL与内标物峰面积比值的相对标准偏差为1.06%，并且纸张中不同部位取样的液相色谱图中两个主要色谱峰峰面积比值的相对标准偏差为9.23%和2.7%，表明取样位置不同，对实验结果无显著性差异。     

浅谈荧光增白剂在造纸湿部中的应用

介绍了化学漂白、添加蓝及荧光增白3种纸张增白方式的区别,对适于造纸湿部使用的荧光增白剂结构进行了简单说明,阐述了影响荧光增白剂应用在造纸湿部过程中增白效果的重要因素。     

含UV示踪剂的组合物和荧光涂料

本发明涉及一种含UV示踪剂的涂料组合物，其中该组合物可使形成的涂层在用UV照射时发荧光。更好的情况是，该UV示踪剂是一种光学增白剂（如苯并嗯唑化合物）。该组合物可用来涂覆织物和皮革基材。     

样品前处理对液相色谱法测定荧光剂的影响

以纸质食品外包装中荧光增白剂为检测对象,对其样品前处理工艺进行了探讨。考察了浸取溶剂种类、用量、提取温度及样品面积等对荧光增白剂提取效果的影响,通过HPLC法对提取的荧光增白剂组分进行对比分析。在样品量一定的情况下,得到了溶剂种类、用量、温度及样品碎片面积的优化工艺。     

靛蓝提取物中靛蓝和靛玉红的分析方法比较

以靛膏为原料,采用盐酸酸化、葡萄糖还原和乙酸乙酯提取3种工艺制备靛蓝酸化物、靛蓝还原物和乙酸乙酯提取物。建立高效液相色谱(HPLC)法、紫外可见分光光度(UV)法和双波长紫外分光光度(dW-UV)法,分析3种靛蓝提取物中靛蓝和靛玉红的含量,并以Kolmogorov-Smirnov检验、Bland-Altman偏差图比较和Spearman检验确定3种样品各自最佳分析方法。结果表明：所建立的HPLC法、UV法和dW-UV法简单、准确、灵敏度高、稳定性好和重复性好。3种靛蓝提取物成分含量检测方法均遵从正态分布,两两测定值存在显著差异。UV法更适于分析靛蓝酸化物、靛蓝还原物中靛蓝含量;HPLC法更适于乙酸乙酯提取物中靛蓝、靛玉红含量分析。     

液体荧光增白剂制备的研究进展

综述了双三嗪二苯乙烯型液体荧光增白剂制备的研究进展。介绍了二磺酸型液体荧光增白剂及四磺酸型液体荧光增白剂的制备工艺及产品的性能。对添加化学助溶剂,采用结晶、沉淀、洗涤、过滤等方法除去盐类及其它杂质,以改善荧光增白剂产品的水溶性、稳定性进行了评述。同时,介绍了膜技术在荧光增白剂分离及精制中的应用。     

Some theoretical and practical aspects of polyester whitening from the wash bath

Uptake of fluorescent whitening agents from aqueous and organic systems by polyester fibers and films under various conditions was investigated. Different factors influencing the correlation between uptake of the fluorescent whitening agents and their performance in laundry liquors are discussed on the basis of the presented data. The results indicate that fluorescent whitening agents normally used for whitening other synthetic fibers can also have valuable additional effects on polyester. Furthermore the results are discussed in terms of the possible mechanisms of whitening.     

Fluorescent whitening agents—a survey (1974-82)

This survey presents a comprehensive coverage of the literature on fluorescent whitening agents for the period 1974 to mid-1982. It is intended to serve researchers in the field by providing an up-to-date summary of the published literature on the synthesis, textile applications and analysis of fluorescent whitening agents. The survey does not cover the use of fluorescent whitening agents as additives for soaps and detergents.The latter part of the survey describes the light fading reactions of five technologically important classes of fluorescent whitening agent. Recent progress in understanding the photochemical processes that are responsible for fading, and the factors that influence the light stability of fluorescent whitening agents in a polymeric environment, are summarized.     

水性聚氨酯荧光增白材料的合成及其性能研究

荧光增白剂可吸收不可见的紫外光,并且将紫外光转变为可见的蓝色或蓝紫色光发射出来;由于蓝色和黄色互为补色,消除了物质中的黄色部分,从而达到了增白效果。因此,采用荧光增白剂合成的水性聚氨酯(WPU)增白材料,用于涂料和织物上,可初步解决芳香族WPU的耐黄变问题。研究了乳液pH值、荧光增白剂的用量及其添加方式对WPU增白效果的影响,并通过透射电镜(TEM)观察增白剂在WPU中的分散情况。实验结果表明,WPU乳液及其胶膜的蓝光效果随着荧光增白剂用量的增加呈先增后降的趋势,当w(荧光增白剂)=0.008%时为最佳;当pH=7～9时,荧光增白剂在WPU中的分散稳定性和增白效果都较好;荧光增白剂的两种添加方式对其在WPU乳液及其胶膜中的分散稳定性和增白效果的影响不明显。     

Synthesis and properties of some new blue‐emitting triazine derivatives of 2‐aminoterephthalic acid,containing a polymerisable group and stabiliser fragment

Seven new blue‐emitting triazine derivatives of 2‐aminoterephthalic acid were synthesised, two of which contained a polymerisable group, one a stabiliser fragment and two containing both a polymerisable group and a stabliser fragment. The synthesised compounds were characterised by analytical methods. The ability of four of the derivatives to copolymerise with methylmethacrylate was demonstrated, thus they can be used for obtaining polymers with a whiteness and fluorescence stable to solvents. Two of the compounds, containing a combination of a stabiliser fragment and a polymerisable group, can be used for ‘one‐step’ stabilisation and whitening of polymer materials. All the compounds, possessing an intense blueish fluorescence, are suitable as fluorescent whitening agents for textiles.     

荧光增白剂BL和BW的应用研究

研究了荧光增白剂BL、BW、CF-351、CBS-X对洗衣粉的粉体白度、棉织物白度、棉织物色光等的应用效果.结果表明,荧光增白剂BL和BW在洗衣粉粉体白度、棉织物白度、棉织物色光等方面都较传统CF-351、CBS-X应用效果有较大提高,其中BL应用效果优于BW.     

阳光因子的洗涤漂白性能研究

本文报告了国家“九五”科技攻关重点项目阳光因子的去污漂白性能。通过阳光因子与洗涤剂的各种成分 ,包括各种阴离子、阳离子、非离子表面活性剂、酶制剂、荧光增白剂、漂白剂等的复配实验 ,突出了阳光因子的去污漂白性能。并通过阳光因子的杀菌实验、降解实验以及Ph 1阳光漂水的洗涤漂白性能实验 ,进一步展示了阳光因子的优点。最后补充介绍了阳光因子的漂白机理及其使用方法。     

Synthesis of some symmetrically substituted stilbene‐triazine derivatives containing tetramethylenepiperidine fragments and their application to make self‐whitening polyacrylonitrile

This study reports the synthesis of nine new fluorescent stilbene‐triazine whitening agents containing a tetramethylpiperidine fragment. These products were isolated and characterised by spectroscopic techniques, i.e. infrared, ultraviolet, and fluorescent spectra, and confirmed by proton nuclear magnetic resonance spectroscopy. The photostability of the new compounds and two optical brighteners containing an unsaturated group without a stabiliser fragment was studied. It was found that the compounds containing tetramethylpiperidine have better photostability. The possibility of the copolymerisation of the unsaturated compounds with acrylonitrile was investigated, and self‐whitening polymers with an intense blue fluorescence were obtained. It was established that 85–86% of the fluorophores are chemically bound to the polymer chain.