Quantitative analysis based on distance using an analytical device utilizing capillary action

摘要

An apparatus for quantitative analysis measurement using an analytical device utilizing capillary action is described. Porous cellulose (that is, general filter paper) can be used as a reagent carrier for analysis. Hydrophobic material can be printed on the paper to create a path that limits capillary flow to a defined area. At least one colorimetric reagent effective to react with a particular analyte is deposited along the capillary channel created in the device. When a liquid containing the analyte is placed at one end of the pathway, the liquid moves along the circuit by capillary action, and the flowing analyte reacts with the reagent until all of the analyte is consumed. A color is generated along the flow path. Quantification of the analyte is achieved by measuring the length of the colored portion along the flow path using a direct reading measurement scale.