20ml，茶色，耐酸耐碱耐腐蚀，质量上乘品质保证。美同达有部分现货。I-CHEMCertified*200and300seriesvialsmeetorexceedU.S.EPA“Specificati***andGuidanceforContaminant-FreeSampleContainers,”andareprovidedwithsample-analysislabels,unattached.I-CHEMCertified300seriesvialsincludeaCertificateofAnalysiswithabarcodeproductionnumberineverycase.Eachvialinthe300serieshasabarcodelabelforabsolutetraceability,andisforusewithautomatedormanualsampletrackingsystems.I-CHEM100seriesvialsaremadefromthesamehigh-qualitymaterialsasI-CHEMCertified200and300series,butarenotprocessedanddonotincludeacertificateorcontainerlabels.CertificatesofAnalysisare***ailablebyrequestfor200seriesvialsandeconomypacks,butun***ailableforthe100seriesvials.)