Chemistry: physical processes – Physical processes – Crystallization
Patent
1978-07-24
1979-06-19
Marantz, Sidney
Chemistry: physical processes
Physical processes
Crystallization
252408, 422 56, G01N 2106, G01N 3316
Patent
active
041585461
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.
REFERENCES:
patent: 3850576 (1974-11-01), Rittersdorf
patent: 3853466 (1974-12-01), Rittersdorf
patent: 3989462 (1976-11-01), Hirsch
patent: 4038485 (1977-07-01), Johnston
Lam Charles T. W.
Rupe Chauncey O.
Gorman, Jr. Edward H.
Marantz Sidney
Miles Laboratories Inc.
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