Capillary tube indicator for the determination of urea concentrations
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United States of America Patent
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Feb 3, 1981
Grant Date -
N/A
app pub date -
Dec 22, 1978
filing date -
Nov 4, 1977
priority date (Note) -
Expired
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Abstract
A capillary tube indicator for determination of urea concentrations, which permits a simple measurement of the sample without auxiliary aids, provides an easily readable measurement, and does not require the addition of buffers, alkali carbonates or hydroxides. The indicator includes a capillary tube of glass or plastic into which a specially prepared indicator strip is inserted. The reaction system of the indicator strip includes a partially purified urease preparation and 1 to 15% of a saccharide or polysaccharide, preferably glucose. The indicator strip also has zones treated with alkali-sensitive dye, applied so as to give either quantitative or semiquantitative readings of urea concentration.
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