Urinalysis - The Carter Center

• Large concentrations of ascorbic acid (vitamin C) cause false
negative results or results that are delayed for 2 minutes or so, while
bleach or peroxide may cause falsely positive reactions.
B. Tes - Tape Test for Glucose
Principle
Tes-Tape is also a screening test, specific for glucose. The principle of
the test and the reaction are virtually identical to those of clinistix; the
tests differ in the oxidation -reduction indicator employed, and the
material the reagents are impregnated on. In Tes-Tape the reagents are
impregnated on a tear strip of special paper, and the indicator is yellow
in its reduced form and green to blue in its oxidized form.
Therefore, a positive reaction is the appearance of a green to blue color.
Sensitivity
Like Clinistix, Tes-Tape is more sensitive to the presence of glucose
than the Benedict's and clinitest methods and will detect 100mg/dl of
glucose or less.
Contents of the test strip
Tes-Tape is impregnated with glucose oxidase, peroxidase, and an
oxidation-reduction indicator in its reduced form.
Precaution
Observe the precaution in the literature with the product.
Procedure
Follow the manufacture direction:
1. Tear off approximately 1 and 1/2 inch.
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