简介：ＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈｌｏｒｏａｒｏｍａｔｉｃｓｗｉｔｈＤｉｃｙｃｌｏｐｅｎｔａｄｉｅｎｙｌＹｔｔｒｉｕｍＣｈｌｏｒｉｄｅⅡＣａｔａｌｙｔｉｃＤｅｃｈｌｏｒｉｎａｔｉｏｎｏｆＰｏｌｙｃｙｃｌｉｃＣｈ...

简介：ThecoastalcitiesarethemostadvancedregionsinChina.Inthepastfewdecades,theenvironmentchangedverysignificantlyduetolargescalehumanactivitiesinthecoastalregions.Polycyclicaromatichydrocarbons(PAHs)inthreedatedsedimentcoresfromthewestcoastoftheYellowSea(coreA01),theYangtzeRiverestuary(YRE;coreA02)andtheOujiangRiverestuary(ORE;coreA03)wereanalyzedtoreconstructtheenvironmentalevolutionaryprocessoftheeastChinacoastalregionoverthepastcentury.Inthethreecores,PAHsconcentrationswereincreasedrapidly.LowerconcentrationsofPAHsweremeasuredincoreA02thanincoresA01andA03.TheverticalvariationofPAHsintheYREWasdominatedbythepetrogenicsources.HistoricalrecordsofPAHsintheOREwerecontrolledbypyrolyticsources.PAHsonthewestcoastoftheYellowSeawerecontributedbythetwosources.

简介：Preparationandcharacterizationofthehapten-proteinconjugatesarefundamentaltodevelopingenvironmentalimmunoassays.Asahapten,1-pyrenebutyricacid(PBA)wasconjugatedtothecarrierproteinofbovineserumalbumin(BSA)orovalbumin(OVA)byactiveestermethod.Infraredspectra(IR)showedthatPBA-BSAandPBA-OVAconjugatesweresuccessfullyprepared.Thenumberofthehaptensconjugatedtothecarrierproteinwasdeterminedbyultravioletspectra(UV)andmatrix-assistedlaserdesorptionionizationtime-of-flightmassspectrometry(MALDI-TOF-MS).ThecalculatedaveragebindingratiosofPBA/BSAandPBA/OVAwere18:1and10:1byUV,and31:1and22:1byMALDI-TOF-MS,respectively.Althoughtherewasadiscrepancybetweentheresultsdeterminedbythetwomethods,bothofthemwereusefulforthecharacterizationofthehapten-proteinconjugates.TheantibodywasproducedagainsttheantigenofPBA-BSA,andtheaffinitywastestedbythedoubleagardiffusionmethod.Theconjugatesandtheantibodycouldbeusedfordevelopingasensitiveandselectiveimmunoassayofpolycyclicaromatichydrocarbons(PAHs).

简介：评论在多不的芳香的烃的分发和描述上被介绍(哼)并且他们的衍生物，包括的nitro哼和水疗院--哼，在东亚的大气的微粒上。通常，哼有二或三枚芳香的戒指的混合物主要被释放进煤气的阶段，当时包含三的那些或更芳香的戒指有微粒物质(下午)的reassociated排放。联系粒子哼首先在与粗糙的粒子联系的好粒子，和很少上被吸附。调查进集中水平在不同区域哼能服务不仅反映污染物质地位和来源而且导致控制策略的明确的表达。现在的学习的结果证明中国有更多严重哼污染比象日本和朝鲜的如此的东方亚洲人国家。

简介：新奇大熔化thiophene的多不的aromatics1基于分核5被综合了，并且它的结构被1HNMR，13CNMR，MS，UVvis和元素的分析证实。合成的关键步骤包含了Stille跨coupling反应并且列在后面由选择-悬挂的thienyl的氧化环合在温和条件下面由FeCl3响。

简介：多不的芳香的烃的命运(哼)居住在空气在最近的年里收到了庞大的注意由于他们的诱变并且人的健康上的carcinogenicrisks。在这上下文，分核的稳定性(当一个代表哼)在石英，氧化铝，胶岭石，高岭石，腐殖酸和与sorbed涂的石英上，腐殖酸在控制相对湿度被调查(RH：即5%和30%)没有轻照耀以便在PAHsdecomposition上检测矿物质表面的催化效果的存在。分核的稳定性被发现强烈取决于底层的物理化学性质。尽管它与sorbed腐殖酸是涂的，石英为分核的分解显示出强壮的催化效果。蒙脱石和腐殖酸上的分核sorbed在试验性的时期期间仍然保持稳定(即3天)。在试验性的房间的潮湿也特别地影响了分核的稳定性矿物质。特别，氧化铝上的分核sorbed很快在更高的RH被分解。然而，有几乎不在石英，高岭石和腐殖酸的情况中完成。取决于喷雾器和RH的物理化学性质，有在空气的矿物质的PAHsassociated将被分解或稳定地居住在空气。

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简介：Anewsamplingmethodofambientairanalysisusingcarbonizedfibrousresinasasorbentforpolycyclicaromatichydrocarbons(PAHs)wasreported.Thephysicalandchemicalpropertiesofthecarbonizedfibrousresinsweremeasured.Thesamplepretreatmentwithultrasonicextractionandsubsequentclean-upehitionthroughasilicagelcolumnwasoptimized.Thesuitableultrasonicextractionconditionswereselectedasfollows:resinweightwas1.5g,ultrasonicextractiontime20min,volumeofextractionsolvent100miandextractionoperationtimes2～3.Theconcentratedextractableorganicmatterwassubmittedtonextstepofclean-upprocedureofadsorptionchromatographyonsilicagelcolumn/n-hexaneandamixtureofdichloromethene:n-hexanesolution2:3(v/v).ThePAHsfractionsintherealsamplesfromChangzhou,ChinawereparticularlyanalyzedusingGC-MSdatasystemandthedataofmassspectra,retentiontimesandscannumbersoftherealsampleswerecomparedwiththatofthestandardsof16PAHslistedbytheUSEPAas'prioritypollutants'oftheenvironment.Theanalysisoftherealsamplesindicatesthatthecarbonizedfibrousresinisagoodsorbent.ThepretreatmentofsamplesofambientairwithcarbonizedfibrousresinasasorbentforP,AHsisprovedtobereliableandmightbeusedfortheprocedureofthedeterminationofPAHsinatmosphericenvironment.

简介：Theproceduresofultrasonicextractionandclean-upwereoptimizedforthedeterminationofpolycyclicaromatichydrocarbons(PAHs)inmarinesediments.Sampleswereultrasonicallyextracted,andtheextractswerepurifiedwithaminiaturizedsilicagelchromatographiccolumnandanalyzedwithhighperformanceliquidchromatography(HPLC)withafluorescencedetector.Ultrasonicationwithmethanol-dichloromethane(2:1,v/v)mixturegavehigherextractionefficiencythanthatwithdichloromethane.Amongthethreeelutionsolventsusedinclean-upstep,dichloromethane-hexane(2:3,v/v)mixturewasthemostsatisfactory.Undertheoptimizedconditions,therecoveriesintherangeof54.82%to94.70%withRSDsof3.02%to23.22%foraspikedblank,andintherangeof61.20%to127.08%withRSDsof7.61%to26.93%foraspikedmatrix,wereobtainedforthe15PAHsstudied,whiletherecoveriesforaNISTstandardreferenceSRM1941bwereintherangeof50.79%to83.78%withRSDsof5.24%to21.38%.Thedetectionlimitswerebetween0.75ngL-1and10.99ngL-1fordifferentPAHs.AsamplefromtheJiaozhouBayareawasexaminedtotesttheestablishedmethods.