2-氯乙基氨基甲酸乙酯气相色谱分析

采用气相色谱法，柱填充物为3％OV-101涂渍在Chromosorb W AW DMCS080～250μm）上，柱温：190℃，气化室：230℃，检测室：230℃；内标物为联苯，用内标法对2-氯乙基氨基甲酸乙酯有效成分进行分离和检验。方法标准偏差≤0．31，变异系数〈0．32，平均回收率为99．86％。     

3-溴-4-氟苯甲醛的气相色谱分析方法

采用气相色谱法,氢火焰离子化检测器,选用3％OV-17填充柱,正十三烷为内标,气化室和检测器温度为180℃．柱温120℃,对3-溴-4-氟苯甲醛进行定量测定。标准偏差0．26％、变异系数0．27％、平均回收率100．1％。     

残杀威原药及其微乳剂的气相色谱分析

采用气相色谱法,5％SE-30毛细管柱和氢火焰离子化检测器,以邻苯二甲酸二丁酯为内标,进样口和检测器温度均为280℃,柱温为260℃,对残杀威原药及微乳剂进行定量测定。该方法简单、快速、准确、适用。标准偏差为0．84％,变异系数为0．91％,回收率为99％～102％之间。     

毛细管气相色谱法定量分析腐霉利

采用DB-35石英毛细管色谱柱和FID检测器,以邻苯二甲酸二丁酯为内标物,在适宜的色谱条件下对腐霉利进行定量分析。色谱条件为柱箱温度220℃;进样口温度280℃,检测器温度280℃,气体流速为载气（N2）6mL／min,燃气（H2）30mL／min,助燃气（Air）300mL／min,分流比20：1。本方法的变异系数0．316％,平均回收率99．82％,线性相关系数为0．9999。     

灭蚁灵的气相色谱分析

本文在5％OV-101为固定相的Chromosorb G AW DMCS(60～80目)0.5米长色谱柱上,柱温260℃,邻苯二甲酸二丁酯或二壬酯作内标,分析测定了有机氯杀虫剂灭蚁灵。     

溴丙磷气相色谱分析

本文探讨了溴丙磷的内标气相色谱法。选用１ｍ×φ２ｍｍ（内径）不锈钢柱，固定液为５％ＯＶ－１０１，担体为ＣｈｒｏｍｏｓｏｒｂＷ（８０～１００目），柱温２２７℃，内标物为癸二酸二辛酯。分析结果的精密度、准确度均符合要求。     

3-溴-4-氟苯甲醛的气相色谱分析方法

采用气相色谱法，氢火焰离子化检测器，选用3％OV-17填充柱，正十三烷为内标，气化室和检测器温度为180℃，柱温120℃，对3-溴-4-氟苯甲醛进行定量测定。该方法简单、快速、准确、适用，标准偏差0．26％、变异系数0．27％、平均回收率100.1％．     

毛细管气相色谱法对乙二醇含量的测定

利用毛细管气相色谱法(GC)测定乙二醇含量。采用PEG-20M毛细管色谱柱,以1,3-丙二醇做内标物,分流进样,分流比20∶1,尾吹气流速20 mL/min,进样口温度260℃,柱温160℃,检测器为氢火焰离子检测器(FID)、检测器温度280℃。结果表明,乙二醇的质量浓度在0.468~2.332 mg/mL时,峰面积与内标峰面积比值与浓度之间线性关系良好,乙二醇的线性回归方程为Y=0.67891X-0.03926(R~2=0.99942)。采用此实验条件可快速准确地分析乙二醇的含量,为乙二醇的分析检测提供参考。     

气相色谱法同时测定车用汽油中甲醇、苯和甲苯含量的研究

文章以丁酮为内标,用气相色谱内标定量法测定车用汽油中的甲醇、苯和甲苯,确定了最佳实验条件,同时对该方法的准确度和精密度进行了验证。试验结果表明：在柱温60℃、进样13温度200℃、检测器温度250℃的条件下,甲醇含量测量结果具有较好的定量重复性,且甲醇、苯和甲苯的检测回收率均可达90％～110％。     

水基气雾剂中右旋炔丙菊酯、右旋苯醚菊酯、氯菊酯气相色谱法测定

目的:建立水基气雾剂中右旋炔丙菊酯、右旋苯醚菊酯、氯菊酯的气相检测方法。方法:采用邻苯二甲酸二戊酯和邻苯二甲酸二丁酯两种物质作内标进行对比,丙酮作为溶剂,用HP-5的毛细管柱为分离柱,采用程序升温的方法进行分离,FID检测器,进样口温度300℃,检测器温度300℃,柱温初始180℃以20℃/min升温至280℃,保留5 min。结果:3种物质在标样与内标质量比1∶5~5∶1范围内呈良好线性关系,相关系数大于0.999,回收率为92.34%~105.12%,RSD为0.182%~0.649%。结论:此方法准确可靠,并且检测快速、高效,对原有方法进行补充。     

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.     

Direct observation of freeze-thaw instability of latex coatings via high pressure freezing and cryogenic SEM

Despite its industrial importance, the subject of freeze-thaw (F/T) stability of latex coatings has not been studied extensively. There is also a lack of fundamental understanding about the process and the mechanisms through which a coating becomes destabilized. High pressure (2100 bar) freezing fixes the state of water-suspended particles of polymer binder and inorganic pigments without the growth of ice crystals during freezing that produce artifacts in direct imaging scanning electron microscopy (SEM) of fracture surfaces of frozen coatings. We show that by incorporating copolymerizable functional monomers, it is possible to achieve F/T stability in polymer latexes and in low-VOC paints, as judged by the microstructures revealed by the cryogenic SEM technique. Particle coalescence as well as pigment segregation in F/T unstable systems are visualized. In order to achieve F/T stability in paints, latex particles must not flocculate and should provide protection to inorganic pigment and extender particles. Because of the unique capabilities of the cryogenic SEM, we are able to separate the effects of freezing and thawing, and study the influence of the rate of freezing and thawing on F/T stability. Destabilization can be caused by either freezing or thawing. A slow freezing process is more detrimental to F/T stability than a fast freezing process; the latter actually preserves suspension stability during freezing. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004 in Chicago, IL. Tied for first place in The John A. Gordon Best Paper Competition.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Bark and Ambrosia Beetles in the Southeastern US

In 2002–2004, we examined the flight responses of 49 species of native and exotic bark and ambrosia beetles (Coleoptera: Scolytidae and Platypodidae) to traps baited with ethanol and/or (−)-α-pinene in the southeastern US. Eight field trials were conducted in mature pine stands in Alabama, Florida, Georgia, North Carolina, and South Carolina. Funnel traps baited with ethanol lures (release rate, about 0.6 g/day at 25–28°C) were attractive to ten species of ambrosia beetles (Ambrosiodmus tachygraphus, Anisandrus sayi, Dryoxylon onoharaensum, Monarthrum mali, Xyleborinus saxesenii, Xyleborus affinis, Xyleborus ferrugineus, Xylosandrus compactus, Xylosandrus crassiusculus, and Xylosandrus germanus) and two species of bark beetles (Cryptocarenus heveae and Hypothenemus sp.). Traps baited with (−)-α-pinene lures (release rate, 2–6 g/day at 25–28°C) were attractive to five bark beetle species (Dendroctonus terebrans, Hylastes porculus, Hylastes salebrosus, Hylastes tenuis, and Ips grandicollis) and one platypodid ambrosia beetle species (Myoplatypus flavicornis). Ethanol enhanced responses of some species (Xyleborus pubescens, H. porculus, H. salebrosus, H. tenuis, and Pityophthorus cariniceps) to traps baited with (−)-α-pinene in some locations. (−)-α-Pinene interrupted the response of some ambrosia beetle species to traps baited with ethanol, but only the response of D. onoharaensum was interrupted consistently at most locations. Of 23 species of ambrosia beetles captured in our field trials, nine were exotic and accounted for 70–97% of total catches of ambrosia beetles. Our results provide support for the continued use of separate traps baited with ethanol alone and ethanol with (−)-α-pinene to detect and monitor common bark and ambrosia beetles from the southeastern region of the US.     

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.     

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.     

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。