Abstract: The invention comprises a prefilled and presealed apparatus for carrying out chemical, particularly immunochemical, analyses in non-laboratory environments. The apparatus comprises a test base containing therein wells, into which are introduced all the reagents necessary for performing the assay reaction in question. The apparatus further comprises a reagent stick having at one end a sharp reactive point onto which a sample to be assayed can be adsorbed. The base and wells are covered with an impervious foil layer which can easily be pierced with the sharp reactive end of the testing stick included in the apparatus, thereby allowing the adsorbed sample to contact the reagents used in carrying out the assay.