美国CHEMetricsK-1705型钙硬度滴定测试盒用于测试水中钙硬度含量。例如：锅炉水。规格参数：产品类型Hardness(calcium)—Titrets®TitrationCells产品型号K-1705测试范围50-500ppm以CaCO3计测试目盛50,55,60,65,70,75,80,90,100,125,150,175,200,250,350,500ppm检测下限50ppm测试方法EGTA（钙）测试次数30次/盒标准配置30支安瓿瓶组件、1瓶指示剂溶液、1个Titrettor™工具、1个25mL样品杯、1份说明书产品价格咨询上海益朗仪器有限公司Titrets®是美国CHEMetrics的专利（专利号：4,332,769）。美国CHEMetrics硬度测试盒VisualKits测试范围MDL测试方法测试盒货号50-500ppm以CaCO3计50ppmEGTA（钙）K-17052-20ppm以CaCO3计2.0ppmEGTA（总）K-450220-200ppm以CaCO3计20ppmEGTA（总）K-4520100-1000ppm以CaCO3计100ppmEGTA（总）K-4585MethodsHardnessisameasureofthemineralcontentofwater.Calciumandmagnesiumarethemostcommonmineralsthatcontributetohardness.Hardwatercausesscalinginboilersandotherindustrialequipment,anddiminishestheeffectivenessofsoapsanddetergents.TheEGTAMethod(calcium)Reference:West,T.S.,DSC,Ph.D.,ComplexometrywithEDTAandRelatedReagents,3rd.ed.,pp.46,164(1969).TheEGTAmethodisspecificforcalciumhardness.TheEGTAtitrantinalkalinesolutionisemployedwithazinconindicator.Resultsareexpressedasppm(mg/L)CaCO3.Shelf-life:eightmonths.Althoughthereagentitselfisstable,theendpointindicatorhasalimitedshelf-life.Werecommendstockingquantitiesthatwillbeusedwithinsevenmonths.TheEDTAMethod(total)References:APHAStandardMethods,23rded.,Method2340C-1997.USEPAMethodsforChemicalAnalysisofWaterandWastes,Method130.2(1983).Thetotalhardnessmethodisapplicabletodrinking,surface,boiler,andbrinewaters.TheEDTAtitrantisemployedinalkalinesolutionwithacalmagiteindicator.Thismethoddeterminesthecombinedcalciumandmagnesiumconcentrationofasample.Ifnomagnesiumispresent,theendpointofthetitrationnormallyappearssluggish.Resultsareexpressedasppm(mg/L)CaCO3.)