毛细管气相色谱法测定八宝五胆药墨中冰片的含量

建立毛细管气相色谱法测定八宝五胆药墨中冰片含量的方法。采用DM-17(50%苯基和50%甲基聚硅氧烷)毛细管色谱柱(柱长为30 m,柱内径为0.32 mm,膜厚度为0.25μm);柱温100℃,保持3 min;以5℃/min升温至130℃,保持2 min;再以50℃/min升温至220℃,保持21 min。以氮气为载气,流速1.0 mL/min; FID检测器。测得冰片的线性范围为17.250～68.999μg/mL(r=1.0,n=7);平均回收率：99.67%(RSD=1.6%,n=6)。该方法简便、准确,专属性强,重现性好,能用于八宝五胆药墨中冰片的含量测定。     

高效液相色谱法测定桑葚中芦丁的含量

用高效液相色谱法测定桑葚中芦丁的含量,色谱柱Agilent-C18(250 mm×4.6 mm,5μm),流动相为甲醇-0.5%磷酸(33∶67),流速1.0 m L/min,检测波长358 nm,进样量20μL,柱温30℃。芦丁在0.023 9~0.119 7 mg/m L浓度范围内与色谱峰面积呈良好的线性关系(r=0.999 8)。该方法灵敏度高,专属性强,重现性好,适合于桑葚药用的质量控制。     

HPLC法测定不同产地金樱子中儿茶素的含量

建立HPLC法测定金樱子中儿茶素含量的方法,采用Hypersil BDS C_(18)(4. 6 mm×250 mm,5μm)色谱柱,以乙腈-0. 2%磷酸水溶液为流动相,进行梯度洗脱,柱温25℃,流速为1 m L/min,检测波长278 nm,进样量20μL。结果表明:儿茶素质量在0. 149～2. 387μg内与峰面积呈良好的线性关系(r=0. 9996);平均加样回收率为101%,RSD为0. 9%(n=6),精密度、稳定性、重复性均符合要求。该方法简单,高效,用该方法测定不同产地的金樱子中儿茶素含量,其中,湖南石门产金樱子儿茶素含量为最高。     

毛细管气相色谱法测定美西林中3种残留有机溶剂

建立了美西林中3种残留有机溶剂（甲醇、乙腈、丙酮）的分离测定方法。采用HP-1（60m×0．53μm×5．00μm）毛细管柱,以氮气为载气,FID检测器,程序升温,柱温为30℃,保持6min,以8℃／min的速度升温至60℃,进样口温度200℃,检测器温度250℃,分流直接进样,外标法计算残留溶剂的含量。结果显示,甲醇、乙腈、丙酮的峰面积对浓度均具有良好的线性关系,精密度相对标准偏差（RSD）均≤2．0％,平均回收率在98．8％～99．4％。本法简单、准确、灵敏度高,适用于美西林中3种残留的有机溶剂同时测定。     

HPLC法测定葛酮通络胶囊中葛根素含量

建立了高效液相色谱法测定葛酮通络胶囊中葛根素的含量方法。采用Hypersil ODS2 C18柱(4.6 mm×250 mm,5μm);流动相:甲醇-水(35∶65);检测波长:250 nm;柱温:25℃;流速:1 m L·min-1;进样量20μL。结果表明:葛根素质量在0.24~1.18μg范围内与峰面积呈良好的线性关系(r=0.9999),葛根素的平均回收率为95.66%,RSD=1.41%(n=6)。结论:该方法操作便捷,准确可靠,重复性好,可以用于测定葛酮通络胶囊中葛根素含量。     

GC法测定肉桂油滴丸中桂皮醛的研究

采用气相色谱法测定肉桂油滴丸中桂皮醛,分析柱DB-WAX(250℃,60 m×250μm×0.25μm),检测器FID,载气为氦气,流速25.45 mL/min,进样口温度200℃,分流进样(20∶1),程序升温:起始温度100℃,以速率5℃升至150℃,保持5 min,再以5℃速率升至200℃,保持5 min,进样量1μL。结果表明,阴性无干扰,分离度高;桂皮醛的检测浓度在0.533 04⁷.995 6 mg/m L范围内与峰面积积分值呈良好线性关系,平均回收率99.63%。所建立的方法准确可靠,可用于肉桂油滴丸的质量控制。     

GC法测定肉桂油滴丸中桂皮醛的研究

采用气相色谱法测定肉桂油滴丸中桂皮醛,分析柱DB-WAX(250℃,60 m×250μm×0.25μm),检测器FID,载气为氦气,流速25.45 mL/min,进样口温度200℃,分流进样(20∶1),程序升温:起始温度100℃,以速率5℃升至150℃,保持5 min,再以5℃速率升至200℃,保持5 min,进样量1μL。结果表明,阴性无干扰,分离度高;桂皮醛的检测浓度在0.533 04~7.995 6 mg/m L范围内与峰面积积分值呈良好线性关系,平均回收率99.63%。所建立的方法准确可靠,可用于肉桂油滴丸的质量控制。     

毛细管气相色谱法测定2,5-二氢呋喃含量

目的:建立气相色谱法测定2,5-二氢呋喃含量。方法:采用DB-624石英毛细管柱(30 m×0.53 mm×3μm),以乙腈为内标物,检测器:氢火焰离子化检测器,柱温:程序升温,初始温度45℃,保持5 min,以10℃/min升至250℃,保持10 min。进样器温度:220℃;检测器温度280℃;载气:氮气,流速3 mL/min,分流比:30∶1。结果:2,5-二氢呋喃在5.884~29.422 mg·mL~(-1)范围内与峰面积呈良好的线性关系,r=0.999 95;平均回收率(n=5)为100.03%。结论:本法灵敏度高、结果准确、重复性好,可用于2,5-二氢呋喃的质量控制。     

高效液相色谱法分析青荚叶中豆甾醇的含量

采用反相高效液相色谱法(RP-HPLC)测定青荚叶中豆甾醇的含量,色谱柱为Thermo C18柱(250 mm×4.6 mm,5μm),流动相为甲醇∶水(97∶3),流速1.0 m L/min,进样量20μL,检测波长210 nm。结果表明,豆甾醇进样量在0.216².16μg,其峰面积与浓度呈良好的线性关系(R2=0.999 5),回收率为97.79%。方法专属性强,准确可靠,可用于青荚叶中豆甾醇的含量测定。     

高效液相色谱法分析青荚叶中豆甾醇的含量

采用反相高效液相色谱法(RP-HPLC)测定青荚叶中豆甾醇的含量,色谱柱为Thermo C18柱(250 mm×4.6 mm,5μm),流动相为甲醇∶水(97∶3),流速1.0 m L/min,进样量20μL,检测波长210 nm。结果表明,豆甾醇进样量在0.216~2.16μg,其峰面积与浓度呈良好的线性关系(R2=0.999 5),回收率为97.79%。方法专属性强,准确可靠,可用于青荚叶中豆甾醇的含量测定。     

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.