Physical Structure Analysis and Optical Properties of Sudan III Thin Film

Background: Sudan III is known red disazo dye possess a hydroxyl group which is sensitively to interact with others molecules such as CO2, O2, SO2 through hydrogen bonding. Methods: Fabrication of Sudan III thin film for sensor technology application has been carried out by using PVD method. The physical structure that is crystallinity of this film has been investigated by using XRD method. Results: The XRD spectra of powder Sudan III shows crystalline structure while the XRD spectra of thin film results of the PVD method, which is deposited on substrate glass slide shows amorphous structure. There are no differences in the crystallinity content of Sudan III thin film that exposure to acetone and alcohol vapor. The interplanar distance of crystals plane is about 28.47 nm, the average crystallite size is about 35.6 nm and the average molecular chain separation is about 37.9 nm. Sudan III thin film result of the PVD method shows an interesting optical characteristic (absorption). There are significantly different between UV-VIS spectra Sudan III thin film compared to the UV-VIS spectra of Sudan III solution. The UV-VIS spectra of the Sudan III thin film shows a decreasing of peak intensity in visible wavelength which indication of orientation effect of molecule on substrate surface. The aborption peak at UV region for Sudan III thin film shows a shifting to the long wavelength compared to the Sudan III in form of solution.

雏鸡脂肪肝冰冻切片制作过程中苏丹Ⅲ染色条件的探索

为探讨在雏鸡脂肪肝冰冻切片制作过程中苏丹Ⅲ染色的最佳条件,取7日龄雏鸡的肝脏组织,用冰冻切片机制作成切片,然后设置不同条件,用苏丹Ⅲ染色液对切片进行染色,观察染色效果,进行对比.结果表明:用苏丹Ⅲ染料染色9 min明显好于5 min和30 min,70%乙醇溶液冲洗5次明显好于2次和9次,蓝化3 min比未蓝化效果更佳.将肝组织冰冻切片标本用苏丹Ⅲ浸染9 min、70%乙醇溶液冲洗5次、苏木素浸染1 min、在自来水中蓝化3 min,肝组织的脂肪部位被明显染成橘红色,观察效果最好.

苏丹红Ⅲ对肌红蛋白的荧光猝灭及分子模拟研究

利用荧光光谱结合分子柔性对接模拟技术研究在模拟生理条件下苏丹红Ⅲ(Sudan RedⅢ)与肌红蛋白(myoglobin,Mb)的作用机理。结果表明:苏丹红Ⅲ对Mb的荧光猝灭作用是由于二者之间形成复合物而导致的静态猝灭,苏丹红Ⅲ与肌红蛋白的表观结合常数KA为7.13×103L/mol,结合位点数约为1;苏丹红Ⅲ与Mb分子的第一个活性口袋周围的氨基酸残基通过疏水作用、亲水作用和氢键作用结合。苏丹红Ⅲ与Mb分子中的Trp、Tyr、Phe等氨基酸残基之间的疏水相互作用,主要是与Phe33、Phe43和Phe138等之间的作用,导致了Mb的内源荧光的静态猝灭和最大发射峰的无序位移。

OP乳化剂增敏苏丹Ⅲ褪色光度法测定料酒中锰含量

利用在硫酸介质中,室温下苏丹Ⅲ能被锰(Ⅶ)氧化而褪色,在515nm波长处褪色明显,在该波长下,体系吸光度的减少值与溶液中Mn(Ⅶ)的质量浓度呈正比,据此建立了测定料酒中微量锰的氧化苏丹Ⅲ光度法。Mn(Ⅶ)离子浓度在0.10～3.50μg/mL范围内符合朗伯比尔定律,线性方程为A=0.04357C(μg/mL)-0.01457,相关系数r=0.9953,缔合物的摩尔吸光系数ε=1.41×104 L/mol·cm,将该法用于市售料酒中锰的测定,加标回收率在98.4%～101.9%之间。

超高效液相色谱-质谱联用法(UPLC-MS/MS)测定辣椒制品中苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ的含量

建立简便快速的测定辣椒制品中4种苏丹红染料的检测方法,以乙腈为提取溶剂,采用乙腈-0.1%水溶液的流动相体系和正离子电离模式,用UPLC-MS/MS测定4种苏丹红染料;苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ线性范围为0～200ng/mL,R2大于0.9911,检出限分别为1.0、2.0、2.0、4.0μg/kg,加标回收率均大于75%,RSD小于10%。该方法简便灵敏,准确快速,可用于辣椒制品中4种苏丹红染料的测定及确证。

辣椒制品中对位红和苏丹红的高效液相色谱同时测定法

目的探讨液相色谱对辣椒制品中对位红,苏丹红Ⅰ、Ⅱ、Ⅲ、Ⅳ的同时检测方法。方法用乙醚提取后于旋转蒸发仪上浓缩至1 ml,用甲醇定容至5 ml,进液相色谱分析,以保留时间定性,峰面积定量。结果在方法选定的条件下,对位红,苏丹红(Ⅰ、Ⅱ、Ⅲ、Ⅳ)不同水平加标回收率范围为:对位红为97.3%～103.0%,苏丹红Ⅰ为96.8%～102.0%,苏丹红Ⅱ为96.5%～102.0%,苏丹红Ⅲ为93.5%～105.0%,苏丹红Ⅳ为92.3%～102.0%。结论该方法简便、易行,适用于辣椒制品中对位红、苏丹红的测定。