| 摘要 |
A chemical test strip comprised of a support layer, a first assay area, a second assay area and a hydrophobic zone positioned between the first assay area and the second assay area. The first and second assay areas are attached to the support layer and comprise an absorbent matrix. The first assay area includes a first test reagent absorbed in its matrix that changes color in response to a first concentration of an analyte such as free available chlorine. The second assay area includes a second test reagent absorbed in its matrix that changes color in response to a second concentration of the analyte. Interpretation of the test strip can be facilitated by printing information on the assay areas which is more visible after the color change than before the color change. |
