compositionink

ink  时间:2021-02-01  阅读:()
InkChromatographyExperimentSafetyandFirstAidThissectionwillonlydealwiththespecificsafetyissuesregardingthechemicalsinvolvedandusedinthevideo;othersafetydatamayberequireddependingonthechemicalsused.
Therearelikelytobeothersafetyissuesthatwillneedtobeaddressedoutsidethescopeofthissectionandafullriskassessmentshouldbeperformedpriortoundertakingtheexperiment.
Studentsshouldnotingestanyoftheexperiment;goodlabpracticestartsyoung!
Rubbingalcoholistoxicifingestedandflammable.
Avoidprolongedinhalationoffumes.
FirstAid–washtheaffectedareawithwater.
Ifrubbingalcoholisingested,DONOTinducevomiting;rinsemouthwithwaterandseekmedicalassistance.
GlossaryChromatography–asetoflaboratorytechniquesusedfortheseparationofmixturesCapillaryaction–theabilityofachemicaltoflowintonarrowspaceswithouttheassistanceofanexternalforce,oftenagainsttheforceofgravitySuggestedTeachingPointsAnalyticalscience–thisexperimentwillintroducestudentstoanalyticalsciencebyinvestigatingthechemicalcompositionofinksChromatography–thisexperimentwillintroduceasimplemethodforchromatographyInvestigativetechnique–thisexperimentwillallowstudentstocomparethechemicalcompositionofdifferentinksProblemsolvinganddatainterpretation–pleaseseethe'MurderMystery'sectionofthe"Suggestedimprovements/studentchallenge"sectionWhattoExpectPleaseseethevideoforadetaileddepictionoftheexperiment.
Inthisexperiment,wewillbeinvestigatingthedifferentchemicalcompositionsofaselectionofinks.
Inordertoachievethis,wewilluseananalyticaltechnique,knownaschromatography,toseparateoutthedifferentmixturesofchemicalspresentintheink.
Forthisexperiment,filterpaperandasolvent(eitherwaterorrubbingalcoholinourcase)willseparateoutthechemicals.
Asmallsampleoftheinktobeinvestigatedisplacedonthebottomofthefilterpaperandthesolventallowedtobedrawnthroughthefilterpaperviacapillaryaction.
Asthesolventpassestheink,anychemicalsthatdissolveinthesolventwillbecarriedalongasthesolventcontinuesupthefilterpaper,whileinsolublechemicalswillremainatthebottom.
Thedistancethateachseparatechemicaltravelsupthefilterpaperisdependentonhowwellitdissolvesinthesolventandhowstronglyitbindstothefilterpaper.
Forachemicalthatdissolveswellinthesolventanddoesnotbindtothefilterpaper,itwilltravelmuchfurtherthanachemicalthatdissolveswellbutbindsstronglytothefilterpaper.
Oncethesolventhasreachedthetopofthefilterpaper,eachinkwillleavebehindaspecificcharacteristicpatternshowingthemixtureofchemicalsthatwerecontainedintheink.
EquipmentandChemicalsWaterRubbingalcoholFilterpaperPencilSelectionofdifferentinksSupplementaryInstructionsThebaselinemustbedrawninpencil.
Ifyouuseapen,theinkmaymoveandmixwiththeinksyouareinvestigating.
Itisessentialthatthelevelofsolventisbelowthepencilbaselineanddoescomeintocontactwithanyoftheinksyouareinvestigating.
Toincreasetherateatwhichthesolventtravelsthroughthefilterpaper,coverthetopofthecontainertomakeanairtightseal.
Tryandhandlethefilterpaperaslittleaspossiblewhilewettopreventtearing.
SuggestedQuestionsforStudentsWhatusecouldchromatographyhaveinchemicalindustry–chromatographyisanessentialtechniqueutilisedbyawideofanalyticalprofessions.
Forexample,syntheticchemistsusechromatographytopurifychemicalsbeforetheyareallowedintouse(e.
g.
pharmaceuticaldrugs).
Otherusesincludeforensicscienceandcheckingthepurityofwater.
Whydoinkshavedifferentcolouredchemicalsinthem–inkstendtohaveavarietyofdifferentcoloureddyestogivethedesiredoverallcolour.
Thisisdemonstratedinthevideoshowingthatgreenhighlightersaremadeofablueandyellowdye.
SuggestedImprovements/StudentChallengeUseothersolvents–studentscouldinvestigatehowothersolventsseparateoutthedifferentchemicalspresentinink.
Ethylacetateandacetone(foundindifferenttypesofnailvarnishremover;seetheingredientslabelforwhich)couldbeused;remembertocompleteanewriskassessmentforthis!
Murdermystery–ascenariocouldbesetupinwhichstudentsundertaketheroleofaforensicscientist.
Thestudentscouldbegivenasampleofinkandtoldthatthiswasfoundonthe'victim'.
Thestudentsshouldthenbegivenaselectionofotherinks,whichprovideuniquedyepatternswhenseparated,thathavebeenobtainedfromthe'suspects'.
Thestudentswouldthencomparethe'victim'samplewiththoseofthe'suspects'todiscoverwhowasresponsible.
CleanupandWasteDisposalThespecificwastedisposalprotocolsforthisexperimentwilldependuponthechoiceofliquidsused.
Spillagescanbecleanedwithwaterandpapertowel.
Filterpapercanbedisposedofinthebin.

酷番云-618云上秒杀,香港1核2M 29/月,高防服务器20M 147/月 50M 450/月,续费同价!

官方网站:点击访问酷番云官网活动方案:优惠方案一(限时秒杀专场)有需要海外的可以看看,比较划算29月,建议年付划算,月付续费不同价,这个专区。国内节点可以看看,性能高IO为主, 比较少见。平常一般就100IO 左右。优惠方案二(高防专场)高防专区主要以高防为主,节点有宿迁,绍兴,成都,宁波等,节点挺多,都支持防火墙自助控制。续费同价以下专场。 优惠方案三(精选物理机)西南地区节点比较划算,赠送5...

hostodo:2021美国独立日7折优惠促销NVMe硬盘的VPS,低至$13/年,还送DirectAdmin授权

7月4日是美国独立日,大致就是国庆节的意思吧。hostodo今年提前搞了个VPS大促销活动,4款便宜VPS,相当于7折,续费不涨价,本次促销不定时,不知道有多少货,卖完为止。VPS基于KVM虚拟,NVMe阵列,1Gbps带宽,自带一个IPv4+/64 IPv6,solusvm管理,送收费版DirectAdmin授权,VPS在用就有效! 官方网站:https://www.hostodo.com ...

PQ.hosting:香港HE/乌克兰/俄罗斯/荷兰/摩尔多瓦/德国/斯洛伐克/捷克vps,2核/2GB内存/30GB NVMe空间,€3/月

PQ.hosting怎么样?PQ.hosting是一家俄罗斯商家,正规公司,主要提供KVM VPS和独立服务器,VPS数据中心有香港HE、俄罗斯莫斯科DataPro、乌克兰VOLIA、拉脱维亚、荷兰Serverius、摩尔多瓦Alexhost、德国等。部分配置有变化,同时开通Paypal付款。香港、乌克兰、德国、斯洛伐克、捷克等为NVMe硬盘。香港为HE线路,三网绕美(不太建议香港)。免费支持wi...

ink为你推荐
qq空间首页现在QQ空间首页能做吗输入法哪个好用输入法哪种比较好用?朗逸和速腾哪个好朗逸跟速腾的最大区别在哪朗逸跟速腾买那个好浮动利率和固定利率哪个好房贷须知:固定还是浮动利率好三国游戏哪个好玩哪款三国游戏最好玩`!股票软件哪个好请问:免费的模拟炒股软件哪个好?车险哪个好购买车险哪家好看书软件哪个好小说阅读软件哪个好清理手机垃圾软件哪个好清理手机垃圾的软件哪个好美国国际东西方大学现在去哪国留学最有前途?
美国主机排名 qq云存储 photonvps dreamhost 美元争夺战 正版win8.1升级win10 win8.1企业版升级win10 美国十次啦服务器 河南移动邮件系统 softbank邮箱 新家坡 isp服务商 paypal注册教程 中国电信宽带测速器 smtp虚拟服务器 海外空间 免费的域名 深圳域名 gotoassist web服务器有哪些 更多