加速溶剂萃取－超高效液相色谱法测定沉积物中硝基呋喃

建立了加速溶剂萃取－超高效液相色谱测定沉积物中硝基呋喃类药物（呋喃唑酮、呋喃它酮、呋喃西林、呋喃妥因）的分析方法。样品经乙腈萃取后,超高效液相色谱分离,流动相为乙腈和0．1％甲酸的2 mmol／L乙酸铵溶液。在优化条件下,4种硝基呋喃类药物在5～200μg／L浓度范围内线性关系良好,相关系数R2＞0．998,方法检出限均为5．0μg／kg。在10～50μg／L添加水平之间的回收率为85．1％～93．6％,相对标准偏差为1．93％～5．04％。该方法灵敏、准确、高效、分析速度快,适用于沉积物中4种硝基呋喃类药物的测定。     

火焰原子吸收光谱法测定电镀液中微量铅

本文提出了用空气-乙炔火焰原子吸收光谱法测定电镀液中微量铅，并研究了各项试验条件。采用同步氚灯扣背景的标准加入法，铅在0．10～10μg／ml范围内符合光吸收定律，其校正曲线的回归方程之相关系数为0．9990以上。该法可应用于硫酸盐镀锌技术的电镀液中微量铅的分析测定，其加标回收率在95％～105％之间，测定的元素检出限为0．10μg／ml，百分灵敏度为0．26μg／ml／1％，同时，仪器操作简便，测定快速，分析可靠。     

超高效液相色谱法代替气相色谱法测定氟乐灵含量

建立了一种超高效液相色谱法测定氟乐灵含量的方法。样品用甲醇定容,以C18为固定相,甲醇＋水为流动相,TUV检测器检测,以保留时间定性,以峰面积定量。结果表明：在0．05～51μg／mL范围内浓度与峰面积线性关系良好,相关系数r=0．99997;在0．01～0．5mg／kg添加浓度范围内,方法平均回收率为65．8-90．6％,相对标准偏差为2．7-7．9％,检出限为0．01g／kg,定量限为0．025g／kg。方法灵敏度高、稳定性好,适用于氟乐灵含量的测定。     

凝胶渗透色谱－液相色谱－串联质谱法测定水产品中性激素

建立水产品中性激素的凝胶渗透色谱净化－超高效液相色谱－串联质谱分析方法。采用乙酸乙酯提取样品,经GPC净化后, LC－MS／MS测定,外标法定量。流动相为乙腈和0．1％甲酸水溶液,梯度洗脱,电喷雾正离子多反应模式监测。3种性激素在0．5～20．0μg／L线性范围内,相关系数大于0．998,定量限为0．3μg／kg,回收率为88．6％～96．4％,相对标准偏差为1．84％～6．24％。本方法灵敏度高、重现性好,适用于水产品中性激素的测定。     

铬天青S分光光度法测定地下水中铝的含量

采用以铬天青S、溴化十四烷基吡啶为试剂的分光光度法进行地下水中铝的测定。研究结果表明,在pH=4．7的HAe--NaAc缓冲溶液中,铝含量在0-5μg范围内符合比耳定律。三元络合物最大吸收波长位于645nm。方法的摩尔吸光系数为：ε=6．63×10％·mol^-1·cm^-1。线性回归方程为：A=0．103e（μg／25mL）,相关系数0．9887,加标回收率94％～102％,方法的检出限0．021μg／mL。     

原子荧光法同时测定生活污水中的砷和硒

本文采用AFS-830双道原子荧光光度计同时测定生活污水中的砷、硒。测定结果表明：在0～10μg/L范围内砷具有良好的线性关系（r=0．9996），在0～100μg/L,范围内硒具有良好的线性关系（r=0．9996）：砷、硒的检出限分别为0．08μg/L，0．17μg/L：砷、硒的相对标准偏差分别为3．600／0、4．51％；该方法简单、快速、准确可靠，符合现代仪器分析的技术要求，值得推广和应用。     

GC—MS快速检测酱油中的氯丙醇

利用GC—MS建立了一种快速检测酱油中三种氯丙醇的方法。采用乙酸乙酯提取,经七氟丁酰基咪唑（HFBI）衍生后,GC—MS检测。1,3-DCP、2,3-DCP、3-MCPD的方法检出限分别为0．454μg／kg、0．564μg／kg、0．240μg／kg。添加浓度为10μg／kg三种标准物质的回收率均大于93％,标准偏差小于3．2。     

电感耦合等离子体发射光谱法同时测定除臭类化妆品中4种禁限用物质

建立了电感耦合等离子体发射光谱法同时测定除臭类化妆品中铅、砷、汞、锌4种禁限用物质的方法。通过试验确定了仪器参数及各元素的分析线,4种元素分别在0．5～6μg／mL、0．05～0．5／Lg／mL、0．02～0．2ug／mL、2～10μg／mL范围内呈良好的线性关系,相关系数均大于0．9997,样品中各元素的加标回收率在89．0％～103．0％之间。方法简便、准确、灵敏度高,为化妆品中禁限用物质的控制提供一种行之有效的分析方法。     

微库仑滴定法测定松节油中微量总硫含量的研究

采用微库仑滴定仪测定松节油中微量硫(≤1．0μg／mL)含量，在偏压为165mV，氮气流速为240mL／min，氧气流速为150mL／min工作条件下，该方法的标准偏差为0．023～0．060，变异系数为7．54％～10．17％，样品加标回收率大于83％，具有简便快速等特点。     

火焰原子吸收光谱法测定涂料中的铅

采用火焰原子吸收光谱法测定涂料中铅的含量，铅在0．5μg／mL～20．0μg／mL范围内具有良好的线性关系。重点讨论了样品的灰化温度、空心阴极灯灯电流对铅含量测定的影响。测定结果RSD≤3．7％，回收率在99．8％，方法简便，结果准确。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.