Water quality. Detection and enumeration of the spores of sulfite-reducing anaerobes (clostridia). pt. 1: Method by enrichment in a liquid medium.- pt. 2: Method by membrane filtration. Prepared by Technical Committee ISO/TC 147: Water Quality
International Organization for Standardization, Geneva (Switzerland)
Water quality. Determination of free chlorine and total chlorine. Pt. 2: Colorimetric method using N,N-diethyl-1,4-phenylenediamine, for routine control purposes
International Organization for Standardization, Geneva (Switzerland)
Fertilizers. Determination of potassium content. Titrimetric method. Prepared by Technical Committee ISO/TC 134: Fertilizers and Soil Conditioners. 1. ed
International Organization for Standardization, Geneva (Switzerland)