1、重慶大學(xué)碩士學(xué)位論文酸溶解鉻鐵中硅鉻磷元素含量測定的研究姓名：李建波申請學(xué)位級別：碩士專業(yè)：化學(xué)工程指導(dǎo)教師：夏之寧李濤20070420重慶大學(xué)碩士學(xué)位論文英文摘要ABSTRACT皿esortofferrochromecanbeclassified勰micro—carbonlowcalbonmiddlecarbonhJ|gh—carbonandnitrogenferrochromeacr掰dingtothecontentofcarben

2、Thekeyoftheelementsanalysisinferrocbromeisdig瞎tionofsamplesDifferentdecomposablemethodisfitfordifferentsamplesMicro—carbonlowcarbonmiddlecarbonferrochromecanbedecomposcdwithacidsolutioniIlwhich1ligh—oalbonandnitrogencarb

3、onferrocbromeisdifficulttodissolvecompletelyTheestablished鋤l如calmethodtothiskindofsampleisusingbasicfusionfordecomposingThispaperstudiedandestablishedanewmethodtodeterminesiliconchromeandphosphorusinhighcarbonandni血ogenf

4、errochromeusingaciddissolvefordecomposingsamples，whichisalsoadaptedforanotherkindsofferrocbromeanalysisInthismethodtheclassicperchloficaciddehydrationgravimetricmethodischangedintomolybdenumbluephotometricmethodtoquickly

5、determinesiliconcontentAfterthesamplesaledissolvedbydilutesulphateinslightacidicsolutionsilicicacidanda缸mloniummolybdatetakereactiontoformintoyellowsilicomolybdiccomplexionthentouseammoniaferroussulfateteducetheformedyel

6、lowsilicomolybdiccomplexionintosilicomolybdicblueofwhichthestrengthoftheblueiscertainlyproportionaltothecontentofsilicon，consequentlysiliconcontentcanbedeterminedbyphotometryChromem哉lsurolnentfromferrochromeisdonewithwet

7、dissolvingmethodOrthophosphodcacidisusedtodecomposesamplesSodiumfluorideandK2S207asauxiliaryreagent，silvernitrateascatalyzeroxidizedbyanunoniumpersulfate，deacidizedbysodiumchloride，chromeistitratedbyferrousmTUnOniumsulfa

8、testandardsolutionwithNphenylatedantbranilicacidasatraceragentPhosphorusmeasurementfromferrocbromeisdonewithPVtoolybdenumbluephotometryAfterthesamplehasbeenacidulatedanddissolvedbybrominewaterandperchloricacid，phosphorus

9、WasoxidizedintoorthophosphoricacidChronlewasremovedfromthesamplebyperchloricacidandhydrochlorideandferrumc鋤bedeacidizedbysodiumsulfiteAftertheaddingofammomummolybdateandammoniumvapⅡldatcn塢PVmolybdenumbluecomplexcanbeform