This review is concerned with the analysis methods that have been devised for the determination of organometallic compounds in the environment. For the purposes of this review the environment includes water, air, plants, crops, fish and crustacae and biological materials. The requirements in this field of analysis are very demanding and are becoming increasingly so. Regarding sensitivity, analysis is now commonly required at the microgram level and frequently at the nanogram or subnonogram levels. The ability to speciate organometallic compounds occuring in the environment is another searching requirement which is of rapidly growing importance and which is being met to a large extent by refinements in chromatographic techniques. This review demonstrates that success in these areas will only be achieved by adopting the most advanced analytical techniques and stretching their capabilities to the limit.