Capillary tube indicator for the determination of urea concentra

Details Capillary tube indicator for the determination of urea concentra Capillary tube indicator for the determination of urea concentra

1978-12-22

1981-02-03

Marantz, Sidney

Chemistry: molecular biology and microbiology

Apparatus

Bioreactor

23924, 422 56, 422 58, 435 12, 435805, C12Q 158, G01N 3352, G01N 3362

Patent

active

042489733

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.

REFERENCES:
patent: 3249513 (1966-05-01), Babson
patent: 3768978 (1973-10-01), Grubb

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