1、氯离子分析仪
技术参数
Model926Model926S
样品量500microlitres20microlitres
分析范围:10-999mgCl/l;2-165mg%Salt10-299mmolCl/l
分析时间:35sec@200mgl/l35sec@100mmolCl/l
准确度:SD<1%@0.1%ClStdSolution+-2%@NQCS100mmol/l
线性:1%inrange10-999mgCl/l1%10-299mmolCl/l
重现性:CVfor20replicates
<1.5%@200mgCl/l<1.5%@100mmolCl/l
REAGENTSYSTEM
TheSherwoodBuffersystemisoptimisedtoeliminateinterferingionsandincorporatesaspecialdispersanttoensurereproducibleformationofthesilverchlorideprecipitateandenhanceanalyticalperformance.
主要特点
使用方便,自动化操作.
很高的灵敏度.
很高的选择性.
Thecoulometricmethodisveryrobustandversatile
oTheSherwoodmicroprocessorbasedInstrumentisergonomicallydesignedandeasytouseandmaintain
oTheSherwoodBufferSystemspecificallydesignedforthemodel926givesoutstandingsensitivityandselectivity
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仪器介绍[下载样本]
KEYAPPLICATIONAREAS
ThemeasurementofSalt(SodiumChloride)concentrationintheFoodandDairyIndustryisuniversal.TheabilitytoreaddirectinSaltconcentrationmakestheSHERWOODModel926theinstrumentofchoiceformanufacturersandfoodanalystsaroundtheworld.
SaltandsalinityalsorepresentsseriouscontaminationinIndustrialprocessesandthesensitivityofthecoulometricmethodenablesmeasurementintheppmrangeinboilerfeedwater,polymerwashes.boreholeslurries,aswellassoilsanalysisandothers.The926hasprovenitselftobethemethodofchoiceformanydesalinationstudiesandgeneralqualitycontrolofsamplelines.
Clinicalmeasurementofthechlorideionisessentialformonitoringofelectrolytebalanceofpatientsasitplays,incombinationwithsodiumandpotassium,animportantpartinmaintainingwaterbalancebetweencells,plasmaandinterstitialfluid.TheModel926sisalsowidelyusedintheconfirmationofthediagnosisofCysticFibrosis.Themodel926Svariantcanaccept20microlitresamples.
SherwoodScientifichasmethodnotesfortheseandotherApplications.PharmaceuticalProduction,CementManufacture,PhotographyVeterinary.
PRINCIPLESOFMETHOD
Themaindifficultieswiththeclassicmethodwerethatsilvernitratereagentwouldchangeonstorageduetoaphotochemicalreactionandthatthetitrationendpointisvisuallyweak.Thereagentwouldhavetobestandardizedrequiringahighlyskilledanalyticaltechnician
The926methodisbasedonacoulometrictitrationandisanabsolutemethodwherethereagent,thesilverions,ispreciselyandquantitativelygeneratedatthetimeoftheanalysisbypassingaconstantcurrentbetweendonorelectrodes.Theendpointisdetectedbytheuseofsensingelectrodeswhichmeasurethechangeinsolutionconductivitywhichoccurswhenexcesssilverionsarepresentinsolution.
