简介:<正>利用H2S系统的分组方法,进行第二组阳离子分析时,CdS沉淀不完全,或完全不沉淀,常认为是由于酸度过高,但是在实际中,有时酸度合适,即0.3mol-l-1HCl通H2S或0.2mol-1用5%TAA时CdS也不沉淀或沉淀不完全,北师大分析比学提出:为保证CdS沉淀完全,除了必须调整酸度外,还须控制Cl-的浓度,那么Cl-浓度控制在多大范围内,才不影响CdS的沉淀呢?为此,我们做了如下的实验:1、取三支离心管,各加入0.42mol·l-1Cd(NO3)21.0ml,5%的TAAl.0ml和0.6mol·-1HNO31.9ml,然后向三支离心试管中分别加入1.0ml浓度为1.7mol,l-1,3.4mol.l-1和5.13mol.l的NaCl溶液,此时可以看至三支离心管
简介:Usingamicrowavegenerator,chlorinedilutedbyheliumwasdissociatedtochlorineatomsthatsubse-quentlyreactedwithhydrogenazidetoproducetheexcitedstatesofNCl(a1△).Meanwhile,moleculariodinewithcarriergasofheliumreactedwithatomicchlorinetoproduceatomiciodinewhichthenwaspumpedtoexcitedstateofI(2P1/2)byanenergytransferreactionfromNCl(a1△).Inthispaper,thechangesofNCl(a1△)andNCl(bi∑)emissionintensityispresentedwhenI2/HeisintroducedintothestreamofCl/Cl2/He/HN3/NCl(a1△)/NCl(b1∑).ThedependencesofatomiciodineI(2P1/2)onflowratesofgaseswerealsoinvestigated.TheoptimumparametersforI(2P1/2)productionaregiven.
简介:FEBRUARY,2016RegulationsConcerningMenstrualPainLeaveaStepintheRightDirectionWomeninAnhuiProvincecantake1-2daysoffwhensufferingmenstrualpainsolongastheyprovideamedicalcertificate,accordingtothelatestlaborregulationsestablishedbytheAnhuiprovincialgovernment.Anhuiisnottheonlyprovincetotakethisstance.Otherregions,suchasJiangsuProvinceandGuangdongProvince,arealso
简介:通过将CBERS-02/02B星数据应用于2008年汶川地震灾害监测,探讨了利用CBERS-02/02B星CCD和HR数据进行地震灾害应急监测的可行性和主要技术途径,为辅助政府部门进行防震救灾提供了决策依据。
简介:ConstructingareasonablereactionkineticmodelforCr-containingwasteincinerationisofhighsignificancetostudytheeffectofvariousfactors,suchastemperature,Cl,onitshexavalentchromiumcompounds.Inthispaper,aprimaryCr/H/Air/ClreactionkineticmodelisbuiltandstudiedbyGaussian03codewithquantumchemistrytheory.Numericalresultsshowthattherearetwooverallreactionsinthemodel,eachofthetwooverallreactionsconsistsoftheirrespectivetwoelementaryreactions.Sothetwooverallreactionsshouldbeomittedfromthemodel.Instead,thefourelementaryreactionsshouldbeaddedintheCr/H/Air/Clreactionkineticmodel.Theactivationenergiesofthefourelementaryreactionsarealsocalculated.