Soil quality. Determination of total cyanide Ingestion-build-63436 This part also applies to

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Soil quality. Determination of total cyanide Ingestion-build-63436 This part also applies to1 Scope This International Standard is applicable to as received (field moist) samples and specifies two different procedures for the liberation of cyanide from the soil: direct liberation of hydrogen cyanide using orthophosphoric acid (normative); extraction with sodium hydroxide solution and subsequent liberation using orthophosphoric acid (informative, see Annex B). The liberated cyanide is determined either by a photometric method or a titrimetric