关于举办“非银盐先进影像技术和功能材料科学与应用研讨会”的通知

中国感光学会非银盐专业委员会将于2013年5月在江西省南昌市举办"非银盐先进影像技术和功能材料科学与应用研讨会".一主题涉及先进影像记录技术与相关功能材料的高端科学与技术:存储、显示、传输等信息材料与技术;     

中国科学院成都有机化学有限公司 化工清洁生产技术与工程创新团队

正中国科学院成都有机化学有限公司(原中国科学院成都有机化学研究所)化工清洁生产技术,与工程创新团队致力于开发绿色化工催化技术及化工清洁生产技术,在羰基合成(煤化工、天然气化工)制备大宗化学品、二氧化碳等工业废气净化与资源化利用、特种纸助剂的制备与应用、三聚氰胺泡沫制备与应     

离子交换与吸附技术应用于生物分离与纯化的最新进展

近年来,离子交换与吸附技术在生物医药领域有着广泛应用,在生物分离与纯化方面的研究不断丰富。通过离子交换与吸附技术可以实现多种活性物质的分离纯化以及目标产物的分离。本文以近几年生物分离与纯化的研究成果为例,首先介绍了离子交换与吸附技术在活性物质提取、病毒分离等方面的应用,之后着重介绍了该技术在血液净化方向的研究进展。未来,离子交换与吸附技术在生物医药领域的成果也将不断推动我国医学、化工、食品等产业的发展。     

化学师范生手持技术接受度与TPACK的相关性研究

以技术接受度模型(Technology Acceptance Model, TAM)与TPACK(Technological Pedagogical Content Knowledge,整合信息技术、教学法、学科内容的知识结构)理论为基础,以手持技术为技术接受度模型与TPACK中的技术对象,利用结构方程模型调查研究H大学化学师范生的手持技术接受度与TPACK的相关性。研究发现：(1)化学师范生对手持技术的行为意愿、感知易用性、主观规范正向影响TPACK的发展;(2)化学师范生对手持技术的感知有用性与自我效能正向影响行为意愿,并能通过行为意愿间接影响TPACK的发展。最后,基于研究结果,提出发挥示范引领作用、重视优质资源的整合应用等提升化学师范生手持技术TPACK的4条建议。     

污染土壤修复技术研究现状与趋势

本文综述了国内外污染土壤修复技术的研究现状和发展趋势,并联系我国土壤污染态势探讨了中国土壤修复技术研发的需求.文中指出,包括生物修复、物理修复、化学修复及其联合修复的污染土壤修复技术体系已经基本形成;土壤修复技术正朝着6大方向发展,即向绿色与环境友好的生物修复、联合杂交的综合修复、原位修复、基于环境功能材料的修复、基于设备化的快速场地修复以及土壤修复决策支持系统及修复后评估等技术方向发展.我国土壤环境污染态势严峻,需要发展能广泛应用、安全、低成本的原位农田生物修复技术和物化稳定技术,发展安全、土地能再开发利用、针对性强的工业场地快速物化工程修复技术与设备,发展能控制水土流失与污染物扩散的矿区植物稳定化与生态工程修复技术,建立污染土壤修复技术规范、评价标准和管理政策.     

电感耦合等离子体质谱(ICP-MS)联用技术的应用及展望

总结了ICP-MS联用技术在国内外检测领域的最新应用,并就"分离器与ICP-MS"、"进样系统与ICP-MS"、"ICP-MS与其它仪器物理联用"等联用技术进行了分类、拓展和总结。ICP-MS联用技术的发展重点将倾向于提高分析精密度、复杂基体元素超痕量分析、同位素比值及形态研究领域,相关联用技术的国家标准或行业标准出台已迫在眉睫。     

污染土壤电动修复技术研究进展

电动修复是一种新兴的原位土壤修复技术,主要用于有机及重金属污染土壤/场地的修复.本文作者介绍了电动修复污染土壤的技术原理;探讨了电动技术与Fenton技术、表面活性剂/助溶剂、超声波技术、微生物技术及渗透性反应屏障技术的联合应用;总结了土壤电动修复中,土壤pH不均衡及有机污染修复效率较低的问题.确定了电动技术与多种技术的联用为土壤修复的研究和应用趋向.     

中国科学院兰州化学物理研究所分离分析科学技术研究室甘肃省天然药物重点实验室

中国科学院兰州化学物理研究所分离分析科学技术研究室／甘肃省天然药物重点实验室是集基础研究与应用研究于一体的高技术科研机构。基础学科属分析化学领域,主要研究方向有分离分析科学,天然药物化学,分子识别化学等。研究内容重点涉及现代分离理论、分离机理、分离新模式;分离分析用新材料、痕量分析技术、复杂样品分析技术、联用分析技术;样品前处理与纯化制备技术;有机化合物结构鉴定光谱与波谱技术等。     

中国科学院兰州化学物理研究所分离分析科学技术研究室 甘肃省天然药物重点实验室

中国科学院兰州化学物理研究所分离分析科学技术研究室／甘肃省天然药物重点实验室是集基础研究与应用研究于一体的高技术科研机构。基础学科属分析化学领域,主要研究方向有分离分析科学,天然药物化学,分子识别化学等。研究内容重点涉及现代分离理论、分离机理、分离新模式;分离分析用新材料、痕量分析技术、复杂样品分析技术、联用分析技术;样品前处理与纯化制备技术;有机化合物结构鉴定光谱与波谱技术等。     

中国科学院兰州化学物理研究所 分离分析科学技术研究室 甘肃省天然药物重点实验室

正简介中国科学院兰州化学物理研究所分离分析科学技术研究室/甘肃省天然药物重点实验室是集基础研究与应用研究于一体的高技术科研机构。基础学科属分析化学领域,主要研究方向有分离分析科学,天然药物化学,分子识别化学等。研究内容重点涉及现代分离理论、分离机理、分离新模式;分离分析用新材料、痕量分析技术、复杂样品分析技术、联用分析技术;样品前处理与纯化制备技术;有机化合物结构鉴定光谱与波谱技术等。     

Recent advances of online coupling of sample preparation techniques with ultra high performance liquid chromatography and supercritical fluid chromatography

Ultra high performance liquid chromatography and supercritical fluid chromatography techniques are favored because of their high efficiency and fast analysis speed. Although many sample preparation techniques have been coupled with common liquid chromatography online, the online coupling of sample preparation with the two popular chromatography techniques have gained increasing attention owing to the increasing requirements of efficiency and sensitivity. In this review, we have discussed and summarized the recent advances of the online coupling of sample preparation with ultra high performance liquid chromatography and supercritical fluid chromatography techniques. The main sample preparation techniques that have been coupled with ultra high performance liquid chromatography online are solid‐phase extraction and in‐tube solid‐phase microextraction, while solid‐phase extraction and supercritical fluid extraction are the main techniques that have been coupled with supercritical fluid chromatography online. Especially, the strategies for online coupling of sample preparation with chromatography techniques were summarized. Typical applications and growing trends of the online coupling techniques were also discussed in detail. With the increasing demands of improving the efficiency, throughput, and analytical capability toward complex samples of the analysis methods, online coupling of sample preparation with chromatography techniques will acquire further development.     

浸入式三相液相微萃取-高效液相色谱法对饮料中7种有机酸的同时测定

建立了一种利用三相液相微萃取(LPME)技术进行样品前处理、高效液相色谱(HPLC)法同时测定饮料中酒石酸、甲酸、乙酸、乳酸、琥珀酸、苹果酸和柠檬酸7种低相对分子质量有机酸的分析方法.考察了萃取溶剂、搅拌速率、盐效应、萃取时间、接收相和给出相pH值等因素对萃取效率的影响.优化后的实验条件:磷酸三丁酯(TBP)为萃取剂,萃取速率为1 000 r/min,萃取时间为35 min,给出相pH为2.5,接收相pH为12.0.该方法在较宽线性范围内显示了良好的线性关系(r＞0.993 6),检出限(S/N=3)为10.4 ～54.2 μg/L,相对标准偏差小于4.8%.7种有机酸的富集倍数为13.3 ～51.4,样品的加标回收率为85% ～103%.该方法操作简单、快速,只需使用极少量的有机溶剂,具有绿色环保的特点,可用于果汁饮料、红茶饮料及基质特别复杂的牛奶饮料中低分子量有机酸的测定,为分析复杂基质样品提供了有益的参考.     

固相微萃取-液相色谱联用技术研究进展*

本文较系统地介绍了固相微萃取-液相色谱联用技术的原理、特点、发展现状及其发展趋势,并对该技术在样品前处理尤其是环境样品前处理中的应用作了较详细的综述     

Emulsification liquid phase microextraction followed by on-line phase separation coupled to high performance liquid chromatography

An emulsification liquid phase microextraction followed by on-line phase separation coupled to high performance liquid chromatography (HPLC) is introduced based on a novel idea for the separation of dispersed organic phase from aqueous phase. In this method, the dispersed organic extraction phase was filtered using an in-line filter and it was separated from the water sample. The new approach is simple and, in addition to improving some limitations of the conventional emulsification liquid phase microextraction, eliminates the need for centrifugation in the phase separation step.     

固相微萃取-高效液相色谱联用技术的进展

固相微萃取（SPME）技术是近年来发展起来的一种无溶剂,集采样、萃取、浓缩、进样于一体的样品预处理新技术,它与同效液相色谱技术的联用已受到人们的瞩目;该文评述了SPME-HPLC联用技术的进展,并展望这一技术的应用前景。     

Comparison and application of two microextractions based on syringe membrane filter

Two proposed syringe membrane filter solid phase microextraction and syringe membrane filter liquid/solid phase microextraction, coupled separately with high performance liquid chromatography, were developed for simultaneous enrichment and determination of the trace level of flavonoids in traditional Chinese medicine. In syringe membrane filter solid phase microextraction, the membrane of syringe membrane filter was served as a solid adsorption film to adsorb target analytes. And in syringe membrane filter liquid/solid phase microextraction, the membrane of syringe membrane filter was used as not only an adsorption phase, but also as a holder of extraction solvent to realize liquid‐solid synergistic extraction. The simple operation, rapid extraction, and little or no organic solvent consumption make the two approaches very interesting. To evaluate the two proposed approaches, the crucial parameters affecting the enrichment factors of target analytes were investigated and optimized, and the two microextractions were intercompared. Moreover, their microextraction mechanisms were analyzed and described. Under the optimized conditions, both the new approaches achieved good linearities, accuracies, precisions, and low limits of detection, and the two methods were successfully applied for concentration of the flavonoids in traditional Chinese medicines.     

Ultrapreconcentration and determination of organophosphorus pesticides in water by solid‐phase extraction combined with dispersive liquid–liquid microextraction and high‐performance liquid chromatography

Solid‐phase extraction coupled with dispersive liquid–liquid microextraction was developed as an ultra‐preconcentration method for the determination of four organophosphorus pesticides (isocarbophos, parathion‐methyl, triazophos and fenitrothion) in water samples. The analytes considered in this study were rapidly extracted and concentrated from large volumes of aqueous solutions (100 mL) by solid‐phase extraction coupled with dispersive liquid–liquid microextraction and then analyzed using high performance liquid chromatography. Experimental variables including type and volume of elution solvent, volume and flow rate of sample solution, salt concentration, type and volume of extraction solvent and sample solution pH were investigated for the solid‐phase extraction coupled with dispersive liquid–liquid microextraction with these analytes, and the best results were obtained using methanol as eluent and ethylene chloride as extraction solvent. Under the optimal conditions, an exhaustive extraction for four analytes (recoveries >86.9%) and high enrichment factors were attained. The limits of detection were between 0.021 and 0.15 μg/L. The relative standard deviations for 0.5 μg/L of the pesticides in water were in the range of 1.9–6.8% (n = 5). The proposed strategy offered the advantages of simple operation, high enrichment factor and sensitivity and was successfully applied to the determination of four organophosphorus pesticides in water samples.     

Boronate affinity monolithic column incorporated with graphene oxide for the in‐tube solid‐phase microextraction of glycoproteins

A poly(vinylphenylboronic acid–ethylene glycol dimethacrylate) monolithic material incorporated with graphene oxide was synthesized inside a poly(ether ether ketone) tube. This tube with boronate affinity monolith was coupled with a high‐performance liquid chromatography system through a six‐port valve to construct an online solid‐phase microextraction with high‐performance liquid chromatography system. The performance of this solid‐phase microextraction with high‐performance liquid chromatography system was demonstrated by standard glycoprotein in aqueous samples, namely, horseradish peroxidase. Some parameters that affect the extraction performance were investigated, including sampling rate, pH of sample solution, and sampling volume. Under the optimized conditions, the developed method showed high extraction efficiency toward horseradish peroxidase. The addition of graphene oxide greatly increased the extraction efficiency of boronate affinity monolith for horseradish peroxidase. The limit of detection of the proposed method was as low as 0.01 μg/mL by using ultraviolet detection. The recognition specificity was also evaluated by analyzing the mixture of bovine serum albumin (nonglycoprotein) and horseradish peroxidase. The results showed that this material could selectively extract horseradish peroxidase from the mixture, indicating its good specificity toward glycoproteins. The proposed method was further applied for analyzing rat plasma samples spiked with horseradish peroxidase. Good recovery and repeatability were obtained.     

中空纤维三相液相微萃取-高效液相色谱法测定环境水样中7种苯氧羧酸类除草剂

建立了利用中空纤维三相液相微萃取-高效液相色谱联用技术(HF-LPME-HPLC)同时测定环境水中痕量麦草畏(dicamba)、氟草烟(fluroxypyr)、4-氯苯氧乙酸(4-CPA)、2甲4氯(MCPA)、2,4-滴(2,4-D)、2,4-滴苯氧丁酸(2,4-DB)和2甲4氯苯氧丁酸(MCPB)等7种苯氧羧酸类除草剂的分析方法。考察了萃取剂﹑接受相和给出相pH值、萃取时间﹑搅拌速度和盐效应等对检测的影响,通过正交试验优化萃取条件,得到的最佳萃取条件为正辛醇作萃取剂,给出相pH为3,接受相pH为12,萃取30 min,搅拌速度400 r/min。结果表明7种除草剂在较宽的线性范围内线性良好,相关系数为0.9953～0.9988,检出限(信噪比为3)为0.2～1.0 μg/L,富集倍数为76.7～121,加标回收率为68%～104%,相对标准偏差为3.2%～8.1%。该法灵敏度高、操作简单、检测快速、有机溶剂消耗少,为环境水样中痕量苯氧羧酸类除草剂残留的分析提供了有益的参考。     

分散液相微萃取技术研究进展

分散液相微萃取是最近发展起来的一种新型样品前处理技术,该方法操作简单、成本低、富集效率高、所需有机溶剂用量极少,是一种环境友好的液相微萃取新技术.与悬滴液相微萃取和中空纤维液相微萃取相比,萃取时间大为缩短.分散液相微萃取可与气相色谱、液相色谱和原子吸收分光光度计等仪器联用,并已在环境样品、食品样品分析中得到了较广泛的应用.本文对分散液相微萃取的基本原理、影响富集效率的因素和目前的应用研究进展进行了评述.