Abstract: Disclosed is an improved method for the preparation of test strips for the semiquantitative determination of glucose in aqueous fluids, e.g. urine. The test strips are comprised of a bibulous carrier impregnated with glucose oxidase, a substance having peroxidative activity and a water soluble iodide salt. The device is coated with the residue of a solution of a film forming material which, pursuant to the improvement disclosed herein, is obtained by saturating the strip with a solution containing about 1.75 to about 4.55 grams (g)/100 milliliters (ml) of ethyl cellulose in an appropriate solvent.

Abstract: A device and method for preparing a ketone body control solution. The device comprises a carrier vehicle having incorporated with it a metal ion complex of a dione compound. The dione compound is characterized as having the structure ##STR1## wherein R and R', same or different, are alkyl groups having 1 to about 6 carbon atoms. The method for preparing the control solution comprises contacting a predetermined volume of liquid with the device.

Abstract: A novel test composition, device and method for determining the presence of urobilinogen in a test sample. The composition is capable of producing a detectable response, such as a change in color or change in light absorption, thus indicating the presence of urobilinogen, both on a qualitative and a semi-quantitative basis. Briefly, the composition comprises para-di(lower alkyl)aminobenzaldehyde as an indicator compound, a buffer substance capable of producing a pH of about 0.5 to 3, and a compound having the structure ##STR1## in which X is O or S, and in which R and R', same or different, are lower alkyl, or R and R' together are lower alkylene or ##STR2## wherein n is an integer of 1 to about 6. The device comprises a carrier matrix incorporated with the composition. The method of use comprises contacting a test sample with the composition or device and observing any detectable response formed therein.

Abstract: A test composition, device, and method for detecting bilirubin in urine. The test composition includes a diazonium compound reactable with urinary bilirubin to produce a color change, an acid pH producing constituent, and a potentiating agent for the test reaction. The potentiating agent is an adduct of a ureido compound and an organic sulfonic acid or a salt form thereof. Particularly useful as the ureido constituent of the adduct are urea and substituted and unsubstituted cyclic ureido compounds, particularly those belonging to the xanthine family. The test device comprises a carrier, such as an absorbent matrix, incorporated with the test composition. The test method is carried out by contacting a urine test sample with the test composition and observing any resulting colorimetric response.