BS ISO 11262:2011
Current
The latest, up-to-date edition.
Soil quality. Determination of total cyanide
Hardcopy , PDF
English
30-11-2011
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.
| 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 |
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.
| 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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