~(13)C-NMR对油脂的定量测定

本工作用外加驰豫试剂及反转门控去偶方式对菜籽油和“营养”油进行了~(13)C-NMR谱的定量测定。在归属各峰基础上,认为该两油脂都以甘油酯形式存在。提出了①多烯类结合脂肪酸占烯类总量的摩尔分数P;②烯碳数与饱和碳数之比R;③包括同种油脂及不同油脂间的油脂分子各类功能团的相对含量的测定计算表达式。     

Study on the Phase Equilibrium of the Ternary System Ethanol-Cesium Carbonate-Water at 10, 30 and 50℃

Introduction The salting out effect in the systems of aliphatic al-cohol-water is of industrial interest. The addition of or-ganic solvents to the aqueous solution of a salt normally decreases the solubility of the salt. So the method can be used for salting-out of inorganic salts to improve yield and purity.1-3 However, the phase diagrams of the inves-tigated systems are required as basic data. There are lots of aliphatic alcohol-water systems having been deter-mined. The 1-butanol-water-Na…     

Thin-layer Spectroelectrochemistry of 3,3′,5,5′-Tetramethyl-benzidine on Pt Minigrid Optically Transparent Electrode

3,3′,5,5′-Tetramethylbenzidine(TMB)-H2O2-horseradish peroxidase(HRP) voltammetric enzyme linked immunoassay system1 has very high sensitivity, low detection limit and wide detection range for the determination of some plant viruses. However, the understanding of the mechanism of HRP catalyzed by H2O2 oxidizing TMB in this system is of significance. In the previous paper, we have reported the spectroelectro- chemical study of TMB on SnO2: F film optically transparent electrode in the …     

A Nano-scale Study on Film Stability

Thickness and stability of films formed by different surfactants are studied by means of thin film balance (TFB) technique to observe the formation and stability of the films. It is demonstrated that stable Newton black films (NBFs) can be easily obtained with non-ionic surfactants (C12E5, C12G2) than ionic surfactants (C12TAB, C16TAB). Common black film (CBF) was obtained with C16TAB at 5×10-3 mol/L, while the film of C12TAB is unstable. It has been demonstrated that the horizontal forces should also be taken into consideration for explaining film stability.     

两种吸附树脂对4B酸吸附行为的比较研究

研究了新型复合功能吸附树脂NDA-99和超高交联大孔吸附树脂JX-101对水溶液中4B酸(对甲苯胺-2-磺酸)的静态吸附行为和热力学特性，结果表明，NDA-99树脂对4B酸的吸附量明显大于JX-101树脂，两种树脂对4B酸的吸附均符合Freundlich吸附等温方程．其中，JX-101对4B酸的吸附属于物理吸附：NDA-99由于树脂表面存在弱碱性官能团，对4B酸的吸附表现为物理吸附和化学络合协同作用。     

Separation of Felted Explosives by Pressurized Microemulsion Electrokinetic Chromatography

A new MEEKC method assisted with pressure-driven mobile phase was presented for the separation of felted explosives. Microemulsion solution was composed of 80 mmol/L heptane-120 mmol/L SDS (sodium dodecyl sulphate)-900 mmol/L butanol-10 mmol/L borate at pH 9.4 and a pressure-driven flow of 0.020 mL/min under 1.3 MPa was employed to manipulate the separation. Explosives HMX (1,3,5,7-tetranitro-1,3,5,7-tetrazacyclooctane) and TATB(triamino-trinitrobenzene), which were felted on fluorine rubber F2311 (polytrifluorochlorethylene and polyvinylidene fluoride 1/1 co-polymerization) and F2314 (polytrifluorochlorethylene and polyvinylidene fluoride 4/1 co-polymerization) were well separated with very good peak shapes.     

几种植物基活性炭材料的表面结构与吸附性能比较——(II)表面化学结构与吸附性能研究

用X-射线光电子能谱对3种植物基活性炭材料:椰壳活性炭 (CAC4)、剑麻茎基活性炭(SSAC)和剑麻基活性碳纤维 (SACF) 的表面化学结构进行了表征,并研究和对比了它们的吸附性能,包括对碘、苯酚和亚甲基蓝的液相吸附性能,对有机蒸汽的吸附性能以及对Au3+的还原吸附性能等。结果表明,3个样品表面均含有多种含氧官能团,吸附能力SACF>SSAC> CAC4。样品的吸附性能主要取决于自身孔结构,与其表面化学结构也有密切的关系。     

PROGRESS ON ACTIVATED CARBON FIBERS

1. INTRODUCTION The serious environment pollution and natural resources waste is imperiling human existence and development. To counter the exhaustion and dilution of natural resources, and to prevent environment from further pollution, it is their duty …     

含油废水处理技术研究进展

在介绍原“老三套”工艺技术的基础上，综述了几种新型除油工艺，混凝法、膜分离法、高吸油树脂法．在对多种不同的工艺技术尤其是树脂吸附法的应用现状和最新进展进行分析、比较后，对各种方法的特点作了总结，并展望其研究与应用的发展趋势。     

芳基重氮盐及其18-冠醚-6络合物的低频红外光谱

本文合成了九种不同取代基的苯基四氟硼酸重氮盐及其与18-冠醚-6形成的分子络合物, 考察它们的低频红外光谱, 讨论这类络合物的成键状况。