德国MN铁测***/补充***931025/931225DataandorderinginformationREF931025(931225)Typecolorimetrictestkit(refillpack)Range0·0.04·0.07·0.10·0.15·0.20·0.30·0.50·1.0mg/LFeSufficientfor200determinati***Shelflifeatleast2yearsSeawatersuitabilityyesDetectablewithPF-12yesNaturalwatersaswellaswastewatersoftencontainsomeiron.ItcanbepresentasFe(II)orFe(III)i***ifthepHvalueofthewaterisbelow3orifthewaterisfreeofoxygen.AthigherpHvaluesFe(III)formsaninsolubleoxyhydrate.Frequentlythesampleisinatransitionstatewithfinelydispersedironoxides.Inwastewaterandnaturalwatercontaininghumicacidsironisoftenpresentintheformofacomplexsalt.TheVISOCOLOR®testkitsonlydetermineironwhichispresentindissolvedformasFe2+orFe3+i***.Ironcomplexesarenotcoveredunlesstheyaredecomposedbyoxidationwithnitricacidandsulphuricacid.)