自动密度仪快速分析汽柴油密度

文章采用自动密度仪快速分析汽柴油的密度,相比较传统的密度计法,该方法具有测定简单、快速而准确,测定过程影响因素相对较少,适用于化验室大批量的汽柴油中控分析。     

EDTA滴定法快速测定粘胶污泥含锌方法探讨

采用EDTA滴定法快速测定粘胶纤维企业废水处理后的污泥含锌量。检测结果表明:该操作方法具有准确、快速、操作简单等特点,适用于污泥含锌量在10%～30%时的测定。     

高压尿液中溶解氧的测定

采用特殊的取样装置,以气相色谱法测定尿液中微量溶解氧。具有简便、快速、准确度高、测定重现性好等优点。其最小检测浓度小于1PPm。适用于对高温、高压下液相中溶解氧的快速测定。     

对氰化液中CN~-和Ag~+测定的初步探讨

采用AgNO3对氰化液中的CN-进行准确测定,采用KCN对氰化液中的Ag+进行准确测定。考察了溶液酸度、共存离子干扰对测定的影响。此法简便快速,检出限可达4μg,适用于常量、微量分析,适合野外现场快速分析。     

自热法快速测定化学需氧量

介绍无需加热回流测定化学需氧量ＣＯＤ的快速测定法，该法取样量少、简便、安全、适用于大批水样的测定。     

微珠比色法在食盐碘化物测定中的应用

采用目前运用较为广泛且简便快速的微珠比色法对食盐中的碘化物进行测定。考察了溶液酸度、显色剂用量、共存离子干扰对测定的影响。此法适用于微量分析,检出限可达0.006μg,适合现场快速分析。     

重量法快速测定磷矿石中氧化镁

介绍采用重量法快速测定磷矿中氧化镁质量分数的方法。铵盐分离干扰元素,利用磷酸二氢铵形成磷酸铵镁沉淀来计算氧化镁的质量分数。该方法重现性和准确度好,适用于磷矿中氧化镁含量的快速测定。     

紫外分光光度法测定环氧树脂中的微量双酚A

本文介绍用紫外分光光度法测定环氧树脂中微量双酚A快速、简便,适用于工业生产的分析。     

快速测定稀释过氧化苯甲酰中硅含量

本文给出一种测定硅含量的方法,该方法与二氧化硅重量法比较,快速,准确,适用于稀释过苯甲酰中硅含量的测定。     

COD快速开管测定法研究

本文介绍COD快速开管测定法,此法取样量少、消解速度快、安全,适用于大批水样的测定。     

Orthophosphates and Diphosphates Containing Zinc and Copper and Zinc and Cobalt

Solid solutions of diphosphates of zinc and copper and of zinc and cobalt were synthesized from mixtures of pure diphosphates at temperatures up to 1000°C. Their X-ray diffractometry patterns varied continuously from one end member to the other. Solid solutions of orthophosphates of composition Zn_3−xCox(PO₄)2, with x = 0.4–1.6, were formed at temperatures up to 950°C; all exhibited the structure of γ-Zn₃(PO₄)2. Solid solutions of orthophosphates of composition Zn_3−xCu_x(PO₄)2 exhibited more-complex behavior. At 1000°C and copper contents of 20–80 mol%, a phase that is related to Cu₃(PO₄)2, termed here the "ε-phase," predominated. At 850°–950°C and in the region from 20 mol% to ∼33 mol% of copper, the solid solutions (the "η-phase") adopted the structure of graftonite. At 800°–900°C and 10–15 mol% of copper, the solid solutions exhibited a new structure (the "δ-phase"), which we found to be related to the mineral sarcopside. At temperatures 950°C, the solutions that contained 5–15 mol% of copper (the "β-phase") had the structure of β-Zn₃(PO₄)2, whereas at 800°–850°C, solutions with 5 mol% of copper (the "-phase") exhibited the structure of γ-Zn₃(PO₄)2. Attempts to synthesize Cu⁺ZnPO₄ and Cu⁺Cu²⁺Zn₃(PO₄)3 were unsuccessful.     

油气储运系统中油气的回收及腐蚀与防护问题

油气储运系统已经与保障国家经济的发展息息相关,介绍了油气储运系统中油气回收问题及腐蚀与防护问题,并提出了相应的解决措施。     

Gemini型表面活性剂结构性能与应用

Gemini型表面活性剂的结构和性质与传统的表面活性剂有很大的不同,例如Gemini型表面活性剂可以视为两个普通表面活性剂在亲水基或者靠近亲水基处由连接基团通过化学键连接而成;Gemini表面活性剂的C20值和cmc值都比传统表面活性剂的值要低很多。着重介绍了Gemini型表面活性剂的特性,结构与表面活性的关系以及应用。     

油气集输处理工艺及工艺流程

为了提高油田的生产效率,设计最佳的油气集输处理的工艺流程,更好地完成油气水分离处理的任务。对油气集输工艺技术进行优化,发挥高效油气水分离处理设备的优势,提高油气水处理的质量,保证油气集输工艺顺利实施,获得最佳的油田产量外输。     

科技创新与钢铁科技进步

建设创新型国家是我们中华民族的历史责任。“自主创新、重点突破、支撑发展、引领未来”的16字方针应当成为我们未来创新活动的指南。建设创新型国家把自主创新放在首位,并提出了引领未来的高标准要求。钢铁科技创新必须突出重点,抓住创新成果产业化这个关键,支撑起行业和国民经济的发展。     

油气管道及储运设施安全保障技术发展现状及展望

相比已经完善丰富的开采和勘探技术,油气的运输以及储存却仍然存在不足之处。我国对能源安全提出更加严格要求的同时,对区域经济的发展规划也有足够重视。因此,保障油气管道的安全则成为了我国能源安全战略的重中之重。在阐释油气管道现阶段在储运安全保障技术发展状况的基础上,分析了现存的问题及解决问题的手段,并指出未来可能使用的目标策略,为今后研究者提供一定程度上的借鉴经验。     

石油与天然气地质与勘探开发措施

石油天然气的地质勘探开发目的是为了获得最佳的油气产能而进行的地质研究工作。石油天然气地质勘探工作具有非常重要的意义,通过地质勘探获得有价值的地层信息资料,对储层油气的显示进行评价和分析,确定具有工业开采价值,才能投入开发生产,为油田创造最佳的经济效益。     

膜的污染和劣化及其防治对策

较为系统地介绍了膜污染和劣化的定义和特点,因膜污染和劣化而造成的膜性能变化,以及如何预防、减少或清除膜污染和劣化的一些通用方法。     

Gel permeation and thin-layer chromatographic characterization and solution properties of butadiene and styrene homopolymers and copolymers

Gel permeation chromatographic (GPC) and thin-layer chromatographic (TLC) studies of polystyrene, polybutadienes (BR), and their copolymers (SBR) have been carried out. GPC primarily separates them on the basis of molecular size, and TLC, on the basis of composition. Methods of obtaining absolute molecular weight distributions for BR and SBR based upon variations of the Strasbourg Universal Calibration procedure are described. In particular, [η]–M relationships in both the GPC solvent (THF) and in a second solvent (toluene) were used; in addition, results of statistical mechanical calculations for \documentclass{article}\pagestyle{empty}\begin{document}$\overline {s^2 }$\end{document} (based on the assumption of negligible steric hindrance and freely rotating bonds) were applied. An experimental comparison of these methods was carried out, and use of the [η]–M relationships for both solvents was found to give satisfactory results. The predictions of the statistical theory were too low. A detailed study of polymer–solvent–gel interaction in the GPC unit was made through investigation of ternary phase equilibrium in the (polystyrene)–THF–(polymer) system. The polymers studied included BR and SBR with varying styrene contents. Experimental techniques for TLC separations of BR, SBR, and polystyrene according to the composition are described.