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DIN EN ISO 15923-1
Water quality - Determination of selected parameters by discrete analysis systems - Part 1: Ammonium, nitrate, nitrite, chloride, orthophosphate, sulfate and silicate with photometric detection (ISO 15923-1:2013); German version EN ISO 15923-1:2024
NA 057-01-07 AA
Nitrate, nitrite
CEN/TC 275/WG 7
Nitrate, nitrite
DIN EN 13654-1 rev
Soil improvers and growing media - Determination of nitrogen - Part 1: Modified Kjeldahl method
prEN 13654-1 rev
Soil improvers and growing media - Determination of nitrogen - Part 1: Modified Kjeldahl method
DIN EN ISO 20236
Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO/DIS 20236:2023); German and English version prEN ISO 20236:2023
EN ISO 20236
Water quality - Determination of total organic carbon (TOC), dissolved organic carbon (DOC), total bound nitrogen (TNb) and dissolved bound nitrogen (DNb) after high temperature catalytic oxidative combustion (ISO/FDIS 20236:2024)
