Abstract: A surface bio-contamination assay kit (1) comprising a disposable swab cartridge (2) comprising a swab (29); a sampler (3) designed to removably receive the cartridge (2) and to wipe the cartridge swab (29) on a surface to be collect a sampled, along a predetermined sampling path (4) designed to cover a predetermined surface area; and a bio-contamination meter (5) designed to removably receive the cartridge (2) after sampling and to measure bio-contamination of the collected sample on the cartridge (2).

Abstract: A method for detecting traces of pollutant in aqueous media, wherein the method includes the use of isocyanates to react on the nucleophilic functions in the form of trace amounts in a wet medium. The method for assaying nulceophilic functions in a wet medium includes the following steps: adding isocyanates to an aqueous solution of basic pH containing the nucleophilic functions to be tested; maintaining the solution for an interval ranging from a few minutes to several dozens of minutes at a temperature lower than 100° C.; and assaying the resulting carbamate, thiocarbamate or urea.