scope:

This International Standard specifies a method for the identification and quantification of organotin compounds
and/or organotin cations in solids as specified in table 1. The working range is 4 µg/kg to 360 µg/kg (assumed
sample intake 2,5 g dry substance).
The properties of the solids (e.g. soil, sediment, sludge and waste) to be analysed with this International
Standard vary widely in its parameters, such as particle size distribution, water content, organic material. Sample
pretreatment shall be designed adequately with respect to the properties of the organotin compounds. Since the
organotin moiety remains unchanged, the anionic part is mainly guided be the chemical environment. Whilst
monoalkyltin compounds are quite polar, tetraalkylated organotin-compounds behave rather like saturated
hydrocarbons. Methyltin compounds are soluble in water whilst octyltin compounds are less soluble. Losses of
tetraalkylated organotin-compounds may occur, e.g. when using elevated temperatures or freeze drying.
After derivatisation the peralkylated organotin compounds behave completely different from their parent
compounds. Methyltin compounds are unlikely to evaporate from aqueous solvents, but peralkylated methyltincompounds
are volatile and subject to losses (see Annex C.3).