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PS 3065-2026
Active
Soil quality — Determination of total cyanide
Committee:
Environment
Sector:
Environment
Available Standards
Original Standard
إنجليزي (English)
24
Page
2026
International Classification for Standards (ICS)
| Code | Classification |
|---|---|
| 13.080.10 | Chemical characteristics of soils |
Adopted Standards
| Standards / Amendment / Corrigendum | |
|---|---|
| 1 | ISO 11262:2011 |
Replacement Sequence
| Replaces |
|---|
| PS 3065-2021 |
Scope
This 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 method using an indicator.
The method is applicable to all types of soil.
Under the conditions specified in this standard, the lower limit of application is 0,5 mg/kg of total cyanide (expressed on the as-received basis) for photometric determination and 10 mg/kg for titrimetric determination.
NOTE Using the alkaline extraction followed by liberation using phosphoric acid, the lower limit of application is 1 mg/kg of total cyanide (expressed on the as-received basis) for photometric determination and 30 mg/kg for titrimetric determination.