Test method[ edit ] The test method consists of immersing the test strip completely in a well mixed sample of urine for a short period of time, then extracting it from the container and supporting the edge of the strip over the mouth of the container to remove excess urine. The strip is then left to stand for the time necessary for the reactions to occur usually 1 to 2 minutes , and finally the colours that appear are compared against the chromatic scale provided by the manufacturer. An improper technique can produce false results, for example, leukocytes and erythrocytes precipitate at the bottom of the container and may not be detected if the sample is not properly mixed, and in the same way, if an excess of urine remains on the strip after it has been removed from the test sample, may cause the reagents to leak from the pads onto adjacent pads resulting in mixing and distortion of the colours. To ensure that this does not occur it is recommended the edges of the strip are dried on absorbent paper. The balance is maintained through the controlled excretion of acidic hydrogens in the form of ammonia ions, monohydrogenated phosphate , weak organic acids and through the reabsorption of bicarbonate through glomerular filtration in the convoluted tubules of the nephron. The pH of urine normally vary between 4.
To learn what your results mean, talk to your health care provider. Is there anything else I need to know about a protein in urine test? If you will be doing your urine test at home, ask your health care provider for recommendations on which test kit would be best for you. At-home urine tests are easy to do and provide accurate results as long as you carefully follow all instructions. References Hinkle J, Cheever K. Protein, Urine; p, Lab Tests Online [Internet].