Triton X-100增敏桑色素荧光法测定痕量三苯基锡

pH4～5的介质中，三苯基锡（TPhT）与过量的桑色素（Morin）迅速形成络合物，此络合物能发较强的荧光，在适量的TritonX－100存在下，由于TritonX－100的增敏作用荧光大大增强。λex／λem＝415／525nm，三苯基锡在0．05×10－6～1．4×10－6mol／L范围内与荧光强度呈良好的线性关系，检出限1．2×10－9mol／L，用于实际水样测定，结果令人满意。     

Features of Methyl Linoleate Oxidation in Triton X-100 Micellar Buffer Solutions

Russian Journal of Applied Chemistry - The kinetics of oxygen absorption during the oxidation of methyl linoleate in Triton X-100 micelles has been studied. The order of the reaction with respect...     

以TritonX-100为增敏剂荧光速率法测定银

基于醋酸钠介质中，银（Ⅰ）催化过硫酸钾氧化荧光素反应，以２，２－联吡啶为活化剂，Ｔｒｉｔｏｎ Ｘ－１００为增敏剂，拟定了测定痕量银的新荧光速率法。本法由于添加 Ｔｒｉｔｏｎ Ｘ－１００表面活性剂，使得灵敏度提高了４倍，测定银含量线性范围为２～３２ μｇ／Ｌ，相对标准偏差为３．１％（ｎ＝９），检出限为１．７６ × １０－３（ｍｇ／Ｌ）。用于测定氯化银的溶度积和光谱感光板中的银，结果满意。     

A Photochemical Study of Uranyl Ion Interaction with the Triton X-100 Micellar System

This is a report on the spectroscopic characteristics of UO²⁺₂in the excited state in Triton X-100 micellar medium. It also indicates some important results of viscosity and surface tension measurements of the system which have direct relevance to the spectroscopic investigation in the excited state. The quenching of the UO²⁺₂fluorescence due to Triton X-100, upon micellization in the aqueous medium, reveals two kinds of microenvironments of the fluorophore from the Stern–Volmer plot. This has been verified by flash photolytic measurements. A blue shift of the quenched emission spectrum is ascribed to the collisional encounter of UO²⁺₂with the head groups of Triton X-100.     

微乳液/离子液体协同增敏分光光度法测定水中苯酚

1引言人体摄入含有一定量苯酚的饮用水后,会出现急性中毒症状,可引起头疼、贫血及神经系统障碍。目前,测定苯酚的方法有电化学法[1]、色谱法[2]和光谱法等。国家规定的环境监测分析方法是4-氨基安替比林(4-AAP)光度法,基于K3Fe(CN)6氧化苯酚生成的氧化物与4-AAP络合显色[3]。但是此法测定灵敏度不高。     

Small Variations in the Composition and Properties of Triton X-100

Two samples of Triton X-100 (TX100) were compared. The "old sample," manufactured by Rohm and Haas, has a mean degree of ethoxylation of 10.1. The "new sample," manufactured by Union Carbide, has a mean degree of ethoxylation of 9.6. The cmc values near room temperature (23 degrees C, old sample; 24.6 degrees C, new sample), as determined from surface tension measurements, are similar. Dynamic light scattering measurements on the new sample gave hydrodynamic radii at different temperatures in reasonable accord with those reported a number of years ago. In contrast, time-resolved fluorescence quenching (TRFQ) experiments using a pyrene-labeled triglyceride as a probe gave aggregation numbers N(agg) near room temperature that were similar to those determined previously by light scattering; however, the N(agg) of the new sample was larger, and the difference was outside of experimental error to one standard deviation. More troubling was that the TRFQ experiment failed to give meaningful results on solutions exposed to air, as in the case of the older TX100 sample. To get useful data by TRFQ measurements, one had to first remove oxygen from the solution. Copyright 2000 Academic Press.     

亮黄-曲通X-100体系共振瑞利散射法测定蛋白质

基于在TrtionX-100存在下，蛋白质对有机染料亮黄瑞利光散射的增强作用。拟定了测定蛋白质的瑞利光散射光，由于添加了TritonX-100，对不同的蛋白质，测定的灵敏度提高了5－11．8倍，线性范围在0－5．0mg/L之间，最低检测限为10．2μg/L。     

Capillary electrochromatography of Triton X-100

Nonionic surfactants such as Triton X-100 (TX-100) are comprised of a mixture of oligomers with a varying degree of length in the ethoxylate chain. The development of chromatographic methods for resolution of the various oligomers of TX-100 is of environmental importance, and can be useful for quality control and characterization in industrial manufacture. Capillary electrochromatography (CEC) is fast becoming a capable separation technique that combines the benefits of both high-performance liquid chromatography (HPLC) and capillary electrophoresis (CE). This report presents a novel CEC method for separation of the various TX-100 oligomers. A comparison of monomeric vs. polymeric stationary phases for separation of TX-100 was conducted. Since the oligomers of TX-100 were better resolved on a monomeric phase as compared to polymeric phase, a systematic mobile phase tuning was performed utilizing a monomeric CEC-C18-3 microm-100 A stationary phase. Various mobile phase parameters such as acetonitrile (ACN) content, Tris concentration, pH, voltage, and temperature were manipulated in order to achieve the optimum separation of oligomers in less than 30 min.     

TritonX-100-5-Br-PADAP光度法测定发样中铁

在表面活性剂Triton X-100存在下,以5－Br-PADAP作显色剂,光度法测定发样中铁,结果在所选浓度范围内线性关系良好,稳定时间长,回收率平均为98．14％。     

Gamma-radiolysis of Triton X-100 aqueous solution

The decomposition of the non-ionic surfactant Triton X-100 in gamma-irradiated deaerated aqueous solution is mainly attributed to the attack of OH radicals and H atoms. The mechanisms of these reactions were investigated in detail, including the influence of pH and dose rate. The RCHOH radicals formed by OH attack on alcohol molecules can decompose the surfactant in aqueous solution.     

新荧光试剂5'-硝基-水杨基荧光酮-Triton X-100荧光吸灭法测定痕量钼的研究

测钼的荧光熄灭法多采用钼与罗丹明类荧光试剂生成不发荧光的配合物而进行测定,我们最近合成的5′-硝基-水杨基荧光酮(5′-N-SAF)结构式见右图,当水溶液中存在TritonX-100时,该配合物具有强烈的荧光;痕量钼的存在可使荧光减弱,据此建立了荧光熄灭测定痕量钼的新方法,该法的灵敏度高(检测限达4×10^-3μg/mL)、选择性好、简单、快速,优于文献,本文研究了Mo(Ⅵ)--5′-N-SAF配合物的形成条件。     

AOT/Triton X-100混合反胶束体系中假丝酵母脂肪酶催化蓖麻油水解的活性

研究了二(2-乙基己基)琥珀酸磺酸钠(AOT)/Triton X-100混合反胶束体系中假丝酵母脂肪酶(candida rugosa lipase)催化蓖麻油水解的反应. 考察了Triton X-100占总表面活性剂的摩尔分数(x(Triton X-100))、水与总体表面活性剂的摩尔比(ω0)、pH值、反应温度以及底物蓖麻油的浓度等因素对酶活性的影响. 研究结果表明, 加入非离子表面活性剂Triton X-100可以使假丝酵母脂肪酶的活性得到显著提高, 但是当底物蓖麻油的浓度大于0.24 mol·L-1时, 会对假丝酵母脂肪酶产生抑制作用.     

用荧光共轭聚合物测定曲通X-100及其临界胶束浓度

基于钯催化的偶联反应合成了疏水性荧光共轭聚合物, 聚[2,5-二壬氧基-1,4-苯撑-乙炔撑-9,10-蒽撑][poly (2,5-bisnonyloxy-1,4-phenylene-ethynylene-9,10-anthrylene) (PPEA)], 并研究了此聚合物在不同表面活性剂溶液中的荧光行为. PPEA在水溶液中荧光明显猝灭, 加入非离子表面活性剂曲通X-100时, 荧光逐渐增强, 而其它表面活性剂CTAB, SDS, Tween对PPEA的荧光强度无明显影响. 这可能是由于曲通X-100与PPEA有相似的脂肪碳链, 二者之间的疏水作用减小了聚合物不规则构象所造成的. 实验考察了有机溶剂THF用量、PPEA浓度、体系酸度、反应时间、共存物质对测定的影响. 最佳条件下, 聚合物荧光强度与曲通X-100的浓度分别在0～200和200～700 μmol/L范围内分段成线性关系, 且两段工作曲线的交点所对应的曲通X-100浓度与其临界胶束浓度(CMC)一致. 据此, 我们建立了一种基于荧光共轭聚合物的荧光方法. 该法允许在其它表面活性剂存在时选择性测定曲通X-100浓度, 也可方便地指示其CMC值.     

Determination of Triton X-100 in influenza vaccine by high-performance liquid chromatography and capillary electrophoresis

Triton X-100 is applied to influenza vaccines at different stages of the manufacturing process to prevent aggregation and precipitation of biomolecules. Furthermore it is used to disintegrate the virus particles in split vaccine and to guarantee the homogeneity during production and utilisation. The final concentration of Triton X-100 has to be determined because the concentration changes in manufacturing process. The determination of the total amount of Triton X-100 as well as the separation of its ethylene oxide oligomers was possible with high-performance liquid chromatography (HPLC) and capillary electrophoresis (CE). In HPLC a change of the column and eluent was necessary, in CE different electrolytes were used for the various separation effects. The HPLC method for the analysis of total Triton was preferred for the quantification of Triton X-100 in influenza vaccine because of better linearity, reproducibility and detection sensitivity compared to CE. In the end products an average concentration of 0.117 mg/mL was found. Received: 19 December 1996 / Revised: 27 February 1997 / Accepted: 6 March 1997     

Peroxyoxalate Chemiluminescence Based on Fluorescent Conjugated Polymer for the Determination of Triton X-100

A novel peroxyoxalate chemiluminescence system has been designed for the determination of Triton X‐100 (TX‐100), in which a hydrophobic fluorescent conjugated polymer, poly[2,5‐bisnonyloxy‐1,4‐phenylene‐ethynylene‐9,10‐anthrylene] (PPEA) was employed as a fluorophor. A strong enhanced intensity of chemiluminescence (CL) was observed in the presence of TX‐100, due to the improved emission efficiency of PPEA in the presence of TX‐100. Under optimum conditions, the detection range of Triton X‐100 is between 1.0×10^?7 and 1.0× 10^?4 mol·L^?1, with a detection limit at 6.0×10^?8 mol·L^?1. The relative standard deviation is 2.4% (n=6) for 1.0×10^?6 mol·L^?1 Triton X‐100. This method provides satisfying results in the detection of TX‐100 in nature water and biological samples with high sensitivity and wide linear range.     

催化动力学分光光度法测定痕量甲醛

甲醛属有毒化学物质,皮肤接触甲醛可引起组织坏死,经消化道吸收,可使口腔粘膜糜烂,产生上腹疼痛、吐血昏迷、肝脏损害及急性肾功能衰竭等症状,甲醛已被列为可疑致癌物之一。个别不法商贩将甲醛直接加入水发产品、米粉、面类和腐竹等食品中,它会在人体中蓄存,达到一定浓度时集中爆发,对人们的身体健康造成极大的威胁。因此对环境及     

头孢唑酮与Triton X-100缔合体系的相互作用

抗生素头孢唑酮的加入使得非离子表面活性剂Triton X-100的表面活性降低. ¹H-NMR的结果表明，头孢唑酮增溶于胶束极性基团附近.头孢唑酮与Triton X-100胶束的结合常数随Triton X-100含量的增加而下降，但头孢唑酮在Triton X-100胶束相和水连续相之间的分配系数不随Triton X-100含量变化而变化.     

Pulse radiolysis of Triton X-100 aqueous solution

Pulse radiolysis of deaerated aqueous solutions of 4·10^–5–2.4·10^–3 mol dm^–3 Triton X-100 gives rise to a transient species originating from the reactions of OH radicals and H atoms. The rate constants of these reactions were found to be 8.8·10⁹ mol^–1·dm³·s^–1 and 1.25·10⁹ mol^–1·dm³·s^–1, respectively, for Triton X-100 concentrations below CMC. The corresponding transient species were found to decay according to second order kinetics. The mechanism of the reactions involved including concentration effects is discussed.