参比电极Vycor多孔塞的维护处理
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IntroductionVycorisoftenusedattheendofareferenceelectrodeorabridgetubetoallowelectrical,ionicconductivitybetweenthebulkofthesolutionandtheinternalfil领solution,whilepreventinglargescaleconvectivemixingofthesolutions.Vycor,or"thirstyglass"isaporousglasswithafairlylowleakrate.TheVycorfrits,however,arenotimmortal!Topreservetheirusefullifetime,they首ldbekeptwet.Iftheyareallowedtodryout,solidcrystalscanclogthenarrowporesandincreasetheelectricalresistance.Inextremecases,theVycorcancrackupondryingout.Whennotinuse,thereferenceelectrodeorbridgetubecanbestoredwiththeVycorfritimmersedindistilledwater.DiffusionthroughtheVycorisfairlyslow,andtheinternalfil领solutionwillnotbediluted,evenuponafewweeksofstorage.Analternativeistoreplacethesmallplasticcapthatwasinplacewhenthereferenceelectrodewasshipped.
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