Patent ID: 8198073

Claim:
A dry stick test device for the determination of an analyte in a milk sample by means of a chemical assay, said device comprising: at least one reagent pad comprising a reagent capable of reacting with the analyte, a derivative of said analyte, or an indicator compound for said analyte to provide a detectable signal when in a moistened state, and a development pad which is located in contact with the at least one reagent pad, said development pad comprising at least one controlling compound capable of providing a condition required for the reagent to react with the analyte to provide a detectable signal, wherein the development pad is located downstream from the at least one reagent pad, wherein the at least one reagent pad and the development pad are arranged to avoid precipitation of sample component(s) on a top-face of the device and wherein the sample is applied on the top-face of the device and the detectable signal is obtained from the top-face of the device, wherein the at least one controlling compound is an acidic compound and wherein the top-face of the device relates to a surface where the milk sample initially gets into contact with the at least one reagent pad.