Abstract: A test kit for detecting organophosphate compounds, includes a support apparatus, a sampling device, a buffer solution in a sample tube, and an acetylcholinesterase as the first active component and a mixture of 5,5?-dithiobis(2-nitrobenzoic acid) (DTNB) and acetylthiocholine. The sampling device is packaged in a sample tube, where the first active component is applied in a first reagent cap and the second active component is applied in a second reagent cap, and the first and second reagent caps each seal a sample tube. The support apparatus has at least four fixing devices for receiving the sample tubes. The sample tubes are fixed parallel to the upper side of the support apparatus, and the support apparatus has at least two receiving devices for receiving the first and second reagent caps and one receiving device for vertically receiving a sample tube.