Abstract: Systems and methods employ a test sensor that includes an identification feature, such as a resistive element or other detectable circuit element, which allows a measurement device to interrogate the test sensor and to determine whether the correct test sensor type is being used to collect a fluid sample. For example, some embodiments employ test sensors that a measurement device can identify according to a response received from the test sensors when the measurement device applies an electrical signal to the test sensors. By facilitating identification of a test sensor, embodiments help ensure that the desired test type, calibration codes, and/or assay sequence are applied to the fluid sample collected by the test sensor.

Abstract: The present invention provides solid ion-extractant and a method for using the same in extracting and recovering ions in a solution. In particular, the present invention provides a method for extracting and recovering ions which are relatively insoluble in a solvent at a particular solvent temperature range. More specifically, the present invention provides a method for extracting and recovering perfluoroalkylsulfonates from an aqueous solution.

Abstract: The present invention provides a method and apparatus for detecting a presence of an analyte in a fluid medium. Specifically, the present invention provides a detection probe comprising an analyte affinity compound which has a higher affinity for the analyte in a fluid medium than the fluid medium itself. In this manner, the analyte in the fluid medium is concentrated onto the detection probe. The present invention also provides a method for using the same in qualitative or quantitative analysis of the analyte in a fluid medium.