物理吸附法卤水脱碘技术的研究

目前,离子膜法制碱采用的原料卤(盐)水中往往含较高量的碘化物,电解时这些碘化物会以碘酸盐的形式沉淀,导致电流效率降低,离子膜寿命缩短。针对这个问题文章介绍了研究去除卤水中微量碘离子的过程。     

离子膜法烧碱蒸发浓缩的生产工艺探讨

离子膜法制烧碱是烧碱生产工艺的常用制法之一。着重介绍了离子膜法制烧碱的生产工艺及过程中的离子膜法碱液蒸发的特点及影响碱液蒸发的因素。     

华泰股份公司50万t离子膜烧碱项目开工

11月8日，华泰股份公司总投资达45亿元建设的50万t离子膜烧碱项目在山东省东营市正式开工建设。这将成为全国最大的单套离子膜烧碱项目。     

离子膜法制烧碱的生产工艺综述

本文着重介绍了离子膜法制烧碱的生产工艺过程中的离子膜法碱液蒸发的特点以及影响碱液蒸发的因素。     

从离子膜烧碱的发展看提高原盐质量的重要性

从离子膜烧碱的发展看提高原盐质量的重要性李书欣，张金铭（河北省盐业公司沧州分公司沧州市０６１０００）关键词离子膜烧碱技术，原盐，质量在计划经济体制下，产品大都处于供不应求的卖方市场，对质量的认识，只要符合标准就行。尤其是我们制盐行业的主要产品──原盐...     

离子膜烧碱过程中自动化仪表设计选型要点

文章结合离子膜烧碱项目的工艺特征以及此类项目上相关实施经验而总结编写,分析了一般离子膜烧碱项目在选型中的要点,对主要的常用工业自动化仪表在离子膜烧碱项目中选型时的材质和关键要点进行分析阐述,以提高自动化仪表在离子膜烧碱项目中的适用性、可靠性和安全性。     

华泰纸业百万吨离子膜烧碱基地项目奠基开工

11月8日,山东华泰集团百万吨离子膜烧碱基地项目一期工程——50万t/a离子膜烧碱项目开工奠基仪式在东营经济开发区新材料园区隆重举行。2006年4月,华泰化工在条件对等、互惠互利的基础上,与世界500强企业——美国杜邦公司签订了合作意向书,意向书确定由华泰化工向杜邦公司在其本土以     

离子色谱法同时测定蛋白胨中5种阴离子

目的建立离子色谱法同时测定微生物培养基蛋白胨中5种阴离子——氯离子Cl~-、硫酸根离子SO_4~(2-)、正磷酸根离子PO_4~(3-)、三偏磷酸根离子P_3O_9~(3-)和碘离子I-含量的方法。方法样品用10mmol/LNaOH溶液溶解浸提,经固相萃取柱OnGuard II RP柱和Na柱去除有机物及阳离子,净化后直接用于目标离子的测定。色谱分离选用强亲水性阴离子交换柱(IonPac AS11, 4.0 mm 250 mm),以KOH为流动相进行梯度洗脱,流速为1 mL/min,于抑制电流为174 mA下用电导检测器检测。结果在35 min内完成5种阴离子的分离分析。该方法测定5种阴离子相关性好(r0.999),线性范围宽,检测限均1μg/mL,蛋白胨样品中目标物的平均加标回收率为99.6%～108.4%(n=9)。结论该方法实现了5种阴离子的同时测定,简单高效,灵敏度高,用于实际样品测定结果满意。     

精制盐用于两碱生产的技术经济探讨

本文分析了精制盐用作纯碱和烧碱生产原料的优势和存在的问题，并提出了解决问题的方法。文中结合实例分析了精制盐用于离子膜烧碱生瓣经济效益，得出精制盐制碱对制盐和制碱企业均有利的结论。     

10万t/a离子膜烧碱装置运行情况总结

简要介绍了江苏省盐海化工有限公司30万t/a离子膜烧碱一期工程——年产10万t/a烧碱装置的工艺及主要设备及试生产开车以来的主要技术经济指标,对开车过程中出现的几个问题进行了详细的原因分析,并提出了解决办法。     

食源性功能肽的研究进展

海洋多肽是生物多肽的重要来源之一,海洋来源多肽种类多并且易于被金属离子修饰,因此海洋来源的肽制备金属离子螯合肽有着天然优势,有望成为未来金属螯合肽研究热点。本文综述了海洋来源金属螯合肽的螯合机理,对单齿螯合模式、双齿螯合模式以及 α 螯合模式三种螯合模式进行了说明。同时归纳总结了肽的大小、肽的氨基酸种类和位置以及一些特殊的基团和残基等因素对螯合效果的影响。列举了海洋来源金属螯合肽的制备及纯化方法,分析了不同方法的优缺点。此外,总结了金属螯合肽促进金属离子吸收、抑菌和抗氧化等生物活性,可为金属离子螯合肽制备、功能活性分析及螯合机理研究提供参考。

     

转基因食品检测方法的现况与进展

为给转基因食品检测提供参考 ,介绍包括除草剂生物分析法 (herbicidebioassays)、western印迹法 (Westernblot)、酶联免疫吸附试验法 (enzyme linkedimmunosorbentassay ,ELISA)、southern印迹法(Southernblot)、聚合酶链反应法 (PolymeraseChainReaction ,PCR)在内的蛋白质检测和DNA检测方法。一些新的方法如近红外光谱法 (near infraredspectroscopy)、DNA微阵列技术法 (Microarray)等略做介绍。对这些方法的基本原理、优缺点和应用范围以及存在的问题进行了分析 ,可供转基因食品检测研究选择分析方法时借鉴。     

Chromatographic and spectroscopic methods in the analysis of triacylglycerol species and regiospecific isomers of oils and fats

The chromatographic, spectrophotometric, and spectroscopic methods usually used for the analysis of oils and fats are reviewed, with special attention to the detection, identification, and quantitation of the triacylglycerol species present in the most common edible vegetable oils. Also, a review of the methods used for the identification of the regiospecific types of the triacylcglycerol species of oils and fats is presented. Methods of high-performance liquid chromatography in the normal, reversed, silver ion, size exclusion, and chiral modes of thin layer chromatography in the normal, reversed, and silver ion modes of supercritical fluid chromatography with capillary glass or stainless steel columns of capillary gas chromatography and of mass spectrometry in different modes are presented and evaluated. The different sample pretreatment methods, the chromatographic columns, the elution systems, and the detectors and detection modes that have been combined with the above methods are also reviewed. Other spectroscopic methods used for the characterization of the status of an oil or fat, such as ultraviolet, fluorescence, chemiluminescence, infrared, and nuclear magnetic resonance are also reported, selectively. The majority of the triacylglycerol species present in an oil or fat could be analyzed and identified by a particular technique of the reviewed methods, but a complete separation in one single run requires a combination of two or more of the existing techniques, especially for samples with high triacylglycerol species variability.     

强极性农药残留检测方法的研究进展

草甘膦等强极性农药大量应用于农业中,其本体及代谢物广泛残留于食品、土壤、水质及生态环境中,因其具有一定的毒害性,如何检测备受人们关注。本文对近年来强极性农药残留检测方法的研究进行了总结,包括衍生法-色谱-质谱联用、非衍生法-液相色谱-质谱联用、离子色谱及离子色谱-串联质谱、毛细管电泳法、ICP-MS或ICP-MS/MS与色谱的联用、快速检测技术（酶联免疫吸附法、免疫传感器法、离子迁移谱（IMS）法、分子印迹-化学传感器法、电化学法）等技术的研究现状和应用情况,为强极性农药及其代谢物残留检测提供参考。     

可见光检测离子色谱法测定痕量金属元素

过渡金属和重金属具有特殊的毒性，快速准确的同时测定多组分样品，尤其是测定高离子强度样品中的离子，在生态环境方面具有重要的意义。离子色谱分析测定痕量金属是被广泛承认的技术，近些年来得到了快速的发展，尤其是具有螯合柱的离子色谱。本文介绍了离子色谱进行富集、分离、检测过渡金属离子的原理和离子色谱测定Cu^2 、Zn^2 、Pb^2 、Cr^3 和Cd^2 的发展。     

Nanoemulsions: Techniques for the preparation and the recent advances in their food applications

Nanoemulsions are the transparent or translucent type of emulsion having droplet sizes ranging from 20 to 500 nm. The stability and application of nanoemulsions depend on the droplet and physicochemical characteristics. The droplet characteristics are studied through the droplet size, droplet composition, droplet concentration, zeta potential, polydispersity, and interfacial tension. The physicochemical properties are studied by their optical property, rheological property, gravitational separation, droplet aggregation, Ostwald ripening, and chemical stability. The emulsifiers and surfactants aid in the emulsification process and are selected according to the requirements of emulsification methods and expected nanoemulsion quality. The methods used for nanoemulsion preparation can be broadly classified into high-energy and low-energy methods. The high-energy methods include high-pressure valve homogenization, high-pressure microfluidic homogenization, ultrasonic homogenization, and rotor-stator homogenization. Similarly, the low energy methods are phase inversion temperature, phase inversion composition, spontaneous emulsification, membrane emulsion, and solvent displacement/solvent evaporation method. The high-energy methods are rapid in comparison to low-energy methods and can handle a large volume of liquid. The low energy methods provide better control over droplet size. Nanoemulsions have broad applications in the food industry such as in the quality enhancement and shelf-life improvement of bakery products, dairy products, meat products, fruit and vegetable products, and also in probiotics and nutraceuticals.     

Physical polymer surface modification methods and applications in food packaging polymers.

Continued innovations in the polymer industry have made polymer surface modification methods a subject of intense research. The importance and necessity of surface modification of plastics are explained, and the advantages of physical surface treatments over the less-sophisticated chemical methods are outlined. Currently available physical surface modification methods for food packaging polymers are reviewed from the food packaging perspective. These physical surface modification methods include flame, corona discharge, UV, gamma-ray, electron beam, ion beam, plasma, and laser treatments. The principle of operation of each method is briefly described, and the advantages and disadvantages of each technique are cited. The extent to which each of these methods can produce the specific modifications desired is discussed. Furthermore, the effects of each treatment on barrier, mechanical, and adhesion properties of food packaging polymers are also examined. Finally, an overview of economic aspects of sophisticated surface modification techniques, including ion beam, plasma, and laser treatments, is presented.     

Analysis of nitrate and nitrite in foodstuffs: A critical review

A general review is presented of published methods for the determination of nitrate and nitrite levels in foodstuffs especially meat. Published methods show wide variations in techniques for extraction, clean-up (clearing) of extracts and final determinative steps and these are critically compared. The effect of interferences due to the presence of ascorbate, sulphite and phosphate together with the formation of a “meat blank” when nitrate is reduced to nitrite with spongy cadmium are discussed. Newer techniques based on the use of ion selective electrodes and automated techniques are outlined and the application of techniques such as amperometry, liquid chromatography, ion exchange and spectrophotometry are listed.     

低度白酒工艺研究

低度白酒的生产方法有多方式：过滤法、离子交换法、吸附法、复蒸馏法。上述方法有利于解决低度白酒混浊和低而不淡的问题。     

阳离子分散松香胶稳定性影响因素的研究

我们从大量的小试及生产实践中发现,逆转法制备阳离子分散松香胶,松香的熔化温度是影响阳离子松香胶储存稳定性的关键因素。转相后加水速度一定时,搅拌时间是影响阳离子松香胶制备稳定性的关键因素。此外,乳化剂的性能,松香胶乳液的PH值等对松香胶的稳定性也有一定的影响。