原子吸收法测定橡胶中的铜

用空气—乙炔火争对橡胶中铜的原子吸收测量法进行试验研究：包括测量条件选择、干扰元素试验、消除干扰研究、分析方法拟订和分析测量的误差统计，该方法的灵敏度０．０５９×１０－６铜，标准方差０．００００３％铜，相对差小于１０％，为±５．７６％。     

空气-乙炔火焰原子吸收光谱法测定头发中钙元素含量的方法及研究

本文研究了空气－乙炔火焰原子吸收光谱法（AAs）测定头发中钙元素含量的方法,并对仪器工作条件,测钙时的干扰及消除方法,待测溶液的酸度进行了讨论。当待测溶液酸度不大于1．5％时,用氧化镧作释放剂,测定结果稳定。采用混酸（硝酸－氟化氢－高氯酸）分解和抗坏血酸与La^3＋联合消干扰剂,有效地消除共存组分的干扰．本方法简便、快捷,具有良好的精密度和准确度,RSD为0．5％,加标平均回收率为97．0％。     

火焰原子吸收光谱法测定高纯石英粉中痕量钙

系统地研究了用空气——乙炔火焰原子吸收光谱分析法测定高纯石英粉中钙的最佳条件，建立了14％的乙醇作为增感剂，在2％盐酸介质中，0．4％ LaCl3溶液作为释放剂，用塞曼火焰原子吸收法测定的可行性方案，探讨了共存元素对钙的干扰及其消除。方法操作简便快速，干扰少，方法相对标准偏差小于3％，适用于日常分析石英粉中的杂质。     

铝锡合金浸镀液中锌,镍的测定

本方法用Ｎｉ＾２＋本身的绿色进行比色求出镍量，用ＥＤＴＡ滴定锌，镍合量（ｐＨ＝１０，ＥＢＴ），再用差减法求出锌量，锌，镍相对误差对＋１％，变异系数为２．０％和１．２％，满足工业生产要求，Ａｌ＾３＋的干扰用ＮａＦ消除。     

火焰原子吸收法测定橡胶中的铅

用ＧＦＵ－２０１原子吸收分光光度计对测定橡胶中的铅进行试验研究。测量条件：波长，２８３３；空气流量４．４Ｌ／ｍｉｎ；乙炔流量１．３Ｌ／ｍｉｎ。消除干扰选用０．３％碳酸钙、０．２％Ｆｅ２Ｏ３和０．１５％钾。灵敏度为０．３×１０－６，相对误差±２．３％，均方差０．００００３６％。     

阴离子交换树脂有机物污染的次氯酸钠复苏机理与方法

在电厂高参数机组凝结水处理中,阴树脂常受到有机物污染。将NaClO应用到阴树脂的复苏中,通过试验确定了NaClO的最佳浓度为0．4％。测定浸出液有机物含量、渗磨圆球率、树脂含水率、树脂工作交换容量,试验表明0．4％NaClO＋10％NaN03的复苏效果优于电厂广泛采用的0．1％NaOH＋10％NaNO3复苏液和3％Na2SO3＋10％NaNO,复苏液的复苏效果。将该复苏液应用于中试试验,结果表明复苏后树脂能够达到一等品的要求。     

碘(V)-碘化物-吖啶橙缔合体系褪色光度法测定磷矿中碘

在0．048mol／L H3PO4中,碘（V）与过量的I^-反应生成I3^-,加入NaAc后,I3^-再与吖啶橙（AO）生成1：1的离子缔合物．使AO发生褪色反应,据此建立了褪色光度法测定碘的新方法。可见光区最大褪色波长为491nm．碘（V）质量浓度在0-0．48μg／mL范围内服从比尔定律,表观摩尔吸光系数ε为1．72×10^5L／mol·cm,检出限为7．47μg／L。MnO4^-等氧化性离子的干扰可加入盐酸羟胺消除．Ca^2＋和Fe^2＋等金属离子的干扰经阳离子交换树脂预分离去除。方法用于测定磷矿中碘,结果与国标法一致,相对标准偏差小于1．32％（n=5）．加标回收率为100．3％～101．0％。     

催化光度法测定水中的痕量锰

用建立在Mn(Ⅱ)对NaIO4和二苯胺磺酸钠反应的催化效应基础上的催化光度法测定水中的痕量锰。最大吸收波长为560nm，工作曲线的线性范围为0－100ngMn^2 /25mL，相关系数0．9708。方法的检测限为0.44ng/mL，相对标准偏差为4．2％。Fe^3 干扰采用离子交换法消除。     

火焰原子吸收光谱法测定牛奶中铁和锌

先将牛奶碳化，再用酸溶解，利用TritonX-100使测定铁、锌的灵敏度分别提高8．3％、16．4％，且有效地消除了牛奶中存在的其他金属离子的干扰。该方法简单、快速、准确。     

莠去津＋特丁津＋乙草胺悬浮剂的气相色谱分析

采用气相色谱法分析检测三元复配农药制剂250g／L莠去津＋250g／L特丁津＋125g／L乙草胺悬浮剂，用FID检测器，对试样中莠去津、特丁津和乙草胺3组分进行分离和定量检测。莠去津、特丁津和乙草胺的平均回收率分别为100．4％、100．2％和100．6％；变异系数分别为0．326％、0．291％、0．465％。     

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。