资源描述：
《AOAC Official Method 991.07 Nitrogen》由会员上传分享，免费在线阅读，更多相关内容在行业资料-天天文库。
1、10.3.05(f)Separatoryfunnelshaker.—(Optional.)Capableofhold-AOACOfficialMethod991.07ing2-LseparatoryfunnelsandshakingthemwithrockingmotionNitrogen-andPhosphorus-ContainingPesticidestothoroughlymixfunnelcontents(EberbachCo.,AnnArbor,MIinFinishedDrinkingWaterUSA,orothersuppliers).GasChroma
2、tographicMethod(g)Tumbler.—CapableofholdingtumblerbottlesFirstAction1991end-over-endat30rpm(AssociatedDesignandManufacturingFinalAction1993Co.,Alexandria,VAUSA,meetsthesespecifications).(h)Boilingstones.—Carborundum,No.12granules.Heat(Applicabletodeterminationof44nitrogen-orphospho-30mi
3、nat400°Cbeforeuse.Coolandstoreindesiccator.rus-containingpesticidesinfinisheddrinkingwater.)(i)Waterbath.—Heated,capableofcontrol±2°C.Usebathinhood.InterlaboratoryStudyResults:(j)Balance.—Analytical,capableofaccuratelyweighingtoCollaborativestudyshowedmethodacceptableforallanalytesneare
4、st0.0001g.testedexceptmerphos,whichthermallydecomposedinGCinjec-(k)Gaschromatograph.—Temperature-programmablesys-tionport.Matrixeffectswerestatisticallysignificantfor5com-temforusewithcapillarycolumns,includingsyringes,analyticalpounds(carboxin,disulfoton,metolachlor,pronamide,andcolumn
5、s,gases,detector,andstripchartrecorder.Datasystemissimazine)infinisheddrinkingwater.Inreagentwater,RSDRforrecommendedformeasuringpeakareas.Primarycolumn:30m´44pesticidesrangefrom12.8to25.4%,andexceeded25%onlyfor0.25mmidDB-5fused-silicacapillarycolumn,0.25mmfilmvernolate(25.4%).Infinishe
6、ddrinkingwater,RSDRfor44pesti-thickness(J&WScientific,Inc.,meetsthesespecifications).Con-cidesrangedfrom11.5to42.6%,andexceeded25%fortricyclazolefirmationcolumn:30m´0.25mmidDB-1701fused-silicacapil-(25.1%),terbufos(25.8%),fluridone(28.1%),terbutryn(29.1%),larycolumn,0.25mmfilmthickness(
7、J&WScientific,Inc.,meetsdisulfoton(32.5%),andcarboxin(42.6%).SeeTable991.07Aforthesespecifications).Operatingconditions:injectionvolumetheresultsoftheinterlaboratorystudysupportingacceptanceof2mLsplitlesswith45sdelay;Hecarriergasat30cm/slinearve-method.locity;injector250°C;dete
