Abstract: The presently disclosed technology may utilize micro-fluidic disk technology, including integrated reagent and/or control one-time use fluid packs that improve functionality and ease of use of the presently disclosed disk. In various implementations, fluids within the disk may move radially inward as well as radially outward as required to functionally achieve the methods described herein. The presently disclosed technology may also be used to distinguish an analyte of interest from the background noise of one or more metabolites thereof in a fluid sample. This may be achieved by magnetically pre-separating some or all metabolites from the analyte of interest within the fluid sample. Using the disclosed techniques, detection of the analyte of interest is not obscured by other compounds leading to false positive test results.

Abstract: Electrochemical sensors commonly used in breath alcohol testing devices detect a concentration of alcohol in a sample of fluid. The sample of fluid is introduced into the electrochemical sensor and a current is generated by the oxidation of the alcohol within the fluid. The electrical output from the electrochemical sensor, plotted over time, forms an output curve, which may be used to estimate the concentration of alcohol in the fluid sample. The technology disclosed herein includes various methods for determining the quantity of an electrochemically convertible substance in a fluid sample using a breath alcohol content device, including detecting water saturation level of the fluid sample. The disclosed technology involves measuring electrochemical sensor outputs to quantify alcohol content of the fluid sample.

Abstract: Electrochemical sensors commonly used in breath alcohol testing devices detect a concentration of alcohol in a sample of fluid. The sample of fluid is introduced into the electrochemical sensor and a current is generated by the oxidation of the alcohol within the fluid. The electrical output from the electrochemical sensor, plotted over time, forms an output curve, which may be used to estimate the concentration of alcohol in the fluid sample. The technology disclosed herein includes various methods for determining the quantity of an electrochemically convertible substance in a fluid sample using a breath alcohol content device, including detecting water saturation level of the fluid sample. The disclosed technology involves measuring electrochemical sensor outputs to quantify alcohol content of the fluid sample.