QUANTITATIVE MANOMETRIC DETERMINATION OF CALCITE AND DOLOMITE IN SOILS AND LIMESTONES
[摘要] Thedeterminationisbasedonthedifferenceinratesofsolutionofcalciteanddolomite.TheCO2evolvedfromreactionofamixtureofcalciteanddolomiteinexcessHClismeasuredatfrequentintervalsuntilthereactioniscompleted.ThelogarithmoftheamountofCO2equivalenttounreactedcarbonateisplottedagainsttime.Followingtherapidandcompletesolutionofcalcite,thecurvefordolomiteassumesamuchsmallerslopeandislinearforaperiodoftime.ExtrapolationofthislinearportionofthecurvetozerotimegivestheamountofCO2equivalenttothedolomiteinitiallypresent.TheCO2fromcalciteisobtainedbydifferencefromthetotalCO2.Theamountsofcalciteanddolomitefoundinanumberofpreparedmixturesbythisinterceptmethodwereingoodagreementwiththeamountsknowntobepresent.SeveralsamplesoflimestoneandcalcareoussoilwereanalysedbytheproposedmethodandtheresultswerecomparedwithX-raydiffractionandchemicaldata.
[发布日期] [发布机构]
[效力级别] [学科分类] 农业科学（综合）
[关键词] [时效性]
