应用固相萃取技术分析全血中阿米替林,多虑平药物

本文用国产大孔径树脂ＧＤＸ－４０３固相柱富集分离全血中的阿米替林、多虑平药物，并用ＧＣ／ＮＰＤ毛细管气相色谱技术进行检测，在１．０ｍｌ全血中加入２．０μｇ药物，回收率分别为８３．６％和３９．７％，ＣＶ值为４．４４％和３．３２％，检出限为２５ｎｇ．ｍｌ＾－１和３０ｎｇ．ｍｌ＾－１。研究结果经动物实验验证，获得满意的结果。     

固定相络合萃取剂处理水中苯酚的性能研究

采用固定相络合萃取剂 YH- 1对水中苯酚进行了萃取与反萃取实验研究 ,考察了组成比、废水 p H、起始浓度、流速及再生次数对 YH- 1萃取性能的影响。结果表明 ,当络合萃取剂与聚合物质量比为 2∶ 1,废水 p H<8时 ,通过单级或多级操作 YH- 1能有效地萃取高浓度含酚废水中的苯酚 ,且再生率达 99.3% ,明显优于活性炭。总之 ,固定相络合萃取剂 YH- 1是一种操作范围广、高效、易再生的处理含酚废水的新体系     

双硫腙－醋酸丁酯萃取石墨炉原子吸收法测定海水中痕量铜、铅和镉

用双硫腙－醋酸丁酯萃取石墨炉原子吸收法测定海水中痕量Ｃｕ、Ｐｈ、Ｃｄ．试验选定了最佳测定条件．结果表明，在弱碱性介质（ｐＨ８－１０）中，能同时定量萃取Ｃｕ、Ｐｂ、Ｃｄ．方法的相对标准偏差＜３％，加标回收率９２％－１０２％，检出限（μｇ／Ｌ）分别为Ｃｕ０．０６，Ｐｂ０．１４，Ｃｄ０．００２．本法操作简便、快速，已应用于海水中Ｃｕ、Ｐｂ、Ｃｄ的分析，取得了令人满意的结果．     

金属框架式气相缓蚀封套野外封存应用验证

目的 验证气相缓蚀技术在军事装备野外封存中的防护效果和勤务适应性,为军事装备野外封存防护探索解决方案.方法 利用气相缓蚀防锈包装技术原理及特点,依据部队装备露天存放或野外驻训的防护需求,设计了金属框架式气相缓蚀封套,并选择6个典型气候环境区的部队,组织了为期1 a的野外实装封存试验.结果 金属框架式气相缓蚀封套物理强度高,具有良好的环境适应性,但水蒸气透过率较大,影响了野外防护效果.结论 金属框架式气相缓蚀封套适合在在少雨、低湿度地区使用,在多雨、潮湿地区应选用阻隔性封套材料.     

氨基-J酸废水处理及资源化研究

用PCW 5萃取剂对氨基 J酸废水进行了萃取处理 ,废水的CODCr去除率 >95 % ,萃取液用碱液反萃回收氨基 J酸产品 ,每立方米废水回收 2 7 9kg氨基 J酸 ,回收产品符合工业品质量要求     

超临界流体萃取技术在环境样品前处理中的应用

综述了超临界流体萃取技术在环境样品前处理中的应用现状。重点介绍了对气体样品和固体样品中几种典型有机污染物的分离。     

用萃取剂LIX84I从电子废弃物处理液中选择性萃取铜

考察了相比、水相pH、混合时间等因素对LIX84I萃取铜的影响，结果表明：这些因素对铜的萃取率都有一定的影响，最优化的条件是有机相为30％LIX84I＋70％煤油、室温、相比=2：1、出口水相pH值=2．0、搅拌速度=910r／min、萃取级数为3级，每级的时间为3min。对铜进行三级萃取和一级反萃，可以得到符合电积要求的硫酸铜溶液，萃取率和反萃取率分别可以达到94．6％和97．8％。     

Competing esterification and oligomerization reactions of typical long-chain alcohols to secondary organic aerosol formation

Organosulfate (OSA) nanoparticles,as secondary organic aerosol (SOA) compositions,are ubiquitous in urban and rural environments.Hence,we systemically investigated the mechanisms and kinetics of aqueous-phase reactions of 1-butanol/1-decanol (BOL/DOL) and their roles in the formation of OSA nanoparticles by using quantum chemical and kinetic calculations.The mechanism results show that the aqueous-phase reactions of BOL/DOL start from initial protonation at alcoholic OH-groups to form carbenium ...     

Effects of persulfate-assisted hydrothermal treatment of municipal sludge on aqueous phase characteristics and phytotoxicity

Hydrothermal technology (HT) has received much attention in recent years as a process to convert wet organic waste into hydrochar.The aqueous phase (HTAP) produced by this process is still a burden and has become a bottleneck issue for HT process development.In this study,we provide the?rst investigation of the HTAP characteristics,phytotoxicity,and their correlation with persulfate (PS)(PS,2.0 mmol/g TS)-assisted municipal sludge HT.The results showed that PS accelerated the hydrolysis of prote...     

Determination of haloacetic acids in hospital effuent after chlorination by ion chromatography

The ion chromatography combined solid phase extraction (SPE) method was developed for the analysis of low concentration haloacetic acids (HAAs), a class of disinfection by-products formed from chlorination of hospital wastewater. The monitored HAAs included monochloroacetic acid, monobromoacetic acid, dichloroacetic acid, dibromoacetic acid and trichloroacetic acid. The method employed a sodium hydroxide eluent at a flow rate of 0.8 mlmin, electrolytically generated gradients, and suppressed conductivity detection. To analyze the HAAs in real hospital wastewater samples, C18 pretreatment cartridge was utilized to reduce samples' turbidity. Preconcentration with SPE and matrix elimination with treatment cartridges were investigated and found to be able to obtain acceptable detection limits. Linearity, repeatability and detection limits of the above method were evaluated. The detection limits of monobromoacetic acid and dibromoacetic acid were 2.61 μgL and 1.30 μgL, respectively, and the other three acids are ranging from 0.48 to 0.82 μgL under 25-fold preconcentration. When the above optimization procedure was applied to three hospital wastewater samples with different treatment processes in Tianjin, it was found that the dichloroacetic acid was the major compound, and the growth ratios of the HAAs after disinfection by sodium hypochlorite were 91.28%, 63.61% and 79.50%, respectively.