汗液PH值研究
这个问题,在论坛之前已经和大家有讨论过,但是一直没有发现合理的解释1.AATCC-15色牢度测试:PH=4.3
2.EN 1811: PH=6.5
同样是测试标准,对汗液的ph值 要求差别这么大 ,哪位有知道标准来龙去脉 或是对汗液ph 有研究的可以贡献一些看法,感谢! :D只知道配制人工汗液,坐等大神来讲标准原理:D http://www.docin.com/p-1078867383.html
这个应该算是比较有价值的一条线索,不同人种的汗液还有差异,但是没法下载
哪位帮忙下载?
感谢! 这个是NOKIA的测试汗液配方参考EN1811:有哪位知道这个来龙去脉的?为什么选用这个配方?
Preparingartificialsweat
Transfer1.00±0.01gofurea(ProAnalysisquality),5.00±0.01gofsodiumchloride(PA
quality)and1.14±0.02gor940±20µlofDL-lacticacid(>88%,PAquality)toa1000ml
beaker.Add900mlfreshdistilledwaterandstiruntilalltheaddedreagentsarecompletely
dissolved.CalibratethepH-meterandimmersethepHelectrodeintothebeaker.Stirgently
andcarefullyadddiluteammoniasolution(1%)untilastablevalue6.50±0.10pHhas
reached.Transferthesolutionto1000mlvolumetricflaskandmakeupthevolumewithdistilledwater.Artificialsweatisorganicsolutionandthereforedeteriorationofthesolution
happensquitefast.Fasterthatfivemonthin+5°C.Testsolutionmustbestorageindark
refrigeratoranditmustdiscardassoonasanymarksofspoilingisvisible(moldfungusetc
visibleparticles).Ifstoragebottlecan’tbecompletelycleanedanewbottlewillbeneeded
tostorageanewsolutionothervicemoldstainsarethebaseofnewbacteriapopulation
andtestsolutionwillbespoiledfaster.
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