AOAC官方方法924.01石灰材料取样程序.doc

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1、AOAC官方方法924.01石灰材料取样程序1.1.01AOACOfficialMethod924.01SamplingofLimingMaterialsProcedureTakelaboratorysamplerepresentativeoflotorshipment.Avoiddis-proportionateamountofsurfaceoranymodifiedordamagedzone.(a)Burntorlumplime,inbulk.—Collectcompositelaboratory

2、sampleof10shovelfuls/car,withproportionateamountsfromsmallerlots,takingeachshovelfulfromdifferentpartoflotorshipment.Imme-diatelycrushtopass5cm(2??)diametercircularopening,mixthor-oughlyandrapidly,reducecompositetoca2kg(5lb)byrifflingorquartering,andpla

3、ceinlabeled,dry,air-tightcontainer.(b)Hydratedlimeandgroundburntlime,inbags.—Select10bagsfromdifferentpartsofeachlotorshipmentof20tonsandoneadditionalbagforeachadditional5tons.Usesamplingtubetowithdrawtoptobottomcorefromeachbagselected.Combinecores,mixt

4、horoughlyandrapidly,reducecompositetoca1kg(2lb)byrif-flingorquartering,andplaceindry,air-tightcontainer.(c)Groundlimestoneandgroundmarl,inbags.—Proceedasin(b).(d)Groundlimestone,groundburntlime,groundmarl,andslag,inbulk.—Useslottedsamplingtubetowithdraw

5、corestofullsam-plerdepthfrom10pointsinlotorshipment.Proceedasin(b),begin-ning“Combinecores,...”.References:JAOAC7,252(1924);7><48,95(1965).CAS-1317-65-3(limestone)??29><>000AOACINTERNATIONAL