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BS ISO 11262:2011

Current
Current

The latest, up-to-date edition.

Soil quality. Determination of total cyanide
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

30-11-2011

Publisher

British Standards Institution

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Sample preservation and preparation
8 Direct liberation using orthophosphoric acid
9 Determination of cyanide - Photometric method
10 Determination of cyanide - Titrimetric method using
   an indicator
11 Expression of results
12 Precision
13 Test report
Annex A (informative) - Precision data
Annex B (informative) - Extraction with sodium hydroxide
        solution and subsequent liberation using
        orthophosphoric acid
Annex C (informative) - Comparison of the direct liberation
        of total cyanide and sodium hydroxide extraction
        with subsequent liberation
Bibliography

Pertains to as-received (field-moist) samples and specifies different procedures for the liberation of cyanide from the soil.

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 AnnexB).

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 International Standard, the lower limit of application is 0,5mg/kg of total cyanide (expressed on the as-received basis) for photometric determination and 10mg/kg for titrimetric determination.

NOTE Using the alkaline extraction followed by liberation using phosphoric acid, the lower limit of application is 1mg/kg of total cyanide (expressed on the as-received basis) for photometric determination and 30mg/kg for titrimetric determination.

Committee
EH/4
DevelopmentNote
Supersedes 99/561486 DC. (10/2003) Supersedes 10/30199670 DC. (12/2011)
DocumentType
Standard
Pages
28
PublisherName
British Standards Institution
Status
Current
Supersedes

Standards Relationship
ISO 11262:2011 Identical

10/30205348 DC : 0 BS 10175 - INVESTIGATION OF POTENTIALLY CONTAMINATED SITES - CODE OF PRACTICE
BS 10175(2011) : 2011 INVESTIGATION OF POTENTIALLY CONTAMINATED SITES - CODE OF PRACTICE

ISO 4793:1980 Laboratory sintered (fritted) filters — Porosity grading, classification and designation
ISO 17380:2013 Soil quality — Determination of total cyanide and easily liberatable cyanide — Continuous-flow analysis method
ISO 11464:2006 Soil quality Pretreatment of samples for physico-chemical analysis
ISO 9297:1989 Water quality Determination of chloride Silver nitrate titration with chromate indicator (Mohr's method)
ISO 14507:2003 Soil quality Pretreatment of samples for determination of organic contaminants
ISO 5725-2:1994 Accuracy (trueness and precision) of measurement methods and results Part 2: Basic method for the determination of repeatability and reproducibility of a standard measurement method
ISO 3696:1987 Water for analytical laboratory use — Specification and test methods
NEN 6655 : 1997 WATER AND SOIL - PHOTOMETRIC DETERMINATION OF THE CONTENT OF TOTAL AND FREE CYANIDE BY CONTINUOUS FLOW ANALYSIS

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Hardcopy - English
PDF - English
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