EN ISO 23161:2011

Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Reagents
6 Apparatus
7 Procedure
8 Calibration
9 Recovery rates of the internal standard compounds
10 Quantification
11 Expression of results
12 Precision
13 Test report
Annex A (informative) - Information about the procedure
Annex B (informative) - Additional clean-up procedures
Annex C (informative) - Information about typical
        instrumental conditions
Annex D (informative) - Information about GC/MS
        identification
Annex E (informative) - Validation data
Bibliography

ISO 23161:2009 specifies a gas-chromatographic method for the identification and quantification of organotin compounds (OTCs) in soils as specified in Table 1. The method is also applicable to samples from sediments, sludges and wastes (soil-like materials). The working range depends on the detection technique used and the amount of sample taken for analysis. The limit of quantification for each compound is about 10 µg/kg.Organotin cations can only be determined in accordance with ISO 23161:2009 after derivatization. The anionic part bound to the organotin cation is mainly dependent on the chemical environment and is not determined using this method. The peralkylated organotin compounds behave in a completely different way from their parent compounds. Tetraalkylated organotin compounds which are already peralkylated, such as tetrabutyltin, are determined directly without derivatization.