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Water quality — Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms

Overview ISO 9509:2006 - Water quality: Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms specifies a laboratory method to determine short‑term inhibitory…

Metallurgical-grade fluorspar — Determination of antimony content — Solvent extraction atomic absorption spec…

Metallurgical-grade fluorspar — Determination of silica content — Reduced-molybdosilicate spectrometric method

Iron ores — Determination of total iron content — Silver reduction titrimetric method

Metallurgical-grade fluorspar — Determination of available fluorine content — Modified Willard-Winter method

Metallurgical-grade fluorspar — Determination of silica content — Reduced-molybdosilicate spectrometric method

Iron ores — Determination of total iron content — Titanium(III) chloride reduction methods

Cereals — Sampling (as grain)

All grades of fluorspar — Determination of arsenic content — Silver diethyldithiocarbamate spectrometric meth…

Metallurgical-grade fluorspar — Determination of total sulfur content — Iodometric method after combustion

Communication networks and systems for power utility automation - Part 8-1: Specific communication service ma…

Overview IEC 61850-8-1:2011 is an international standard established by the International Electrotechnical Commission (IEC) that defines specific communication service mappings (SCSM) for power utili…

Water quality. Toxicity test for assessing the inhibition of nitrification of activated sludge microorganisms

1 Scope This International Standard specifies a method for assessing the short-term inhibitory effect of waters, waste waters or test substances on nitrifying bacteria in activated sludge . The inhib…