Phenol red was used in the phenolsulfonphthalein test, also known as the PSP test. This test was used to estimate the overall blood flow through the kidney and is now obsolete.
The test is based on the fact that phenol red is excreted almost entirely in the urine. Phenol red solution is administered intravenously, the urine produced is collected. By measuring the amount of phenol red excreted colorimetrically, kidney function can be determined.
Read more about this topic: Phenol Red
Famous quotes containing the word test:
“Utopias are presented for our inspection as a critique of the human state. If they are to be treated as anything but trivial exercises of the imagination. I suggest there is a simple test we can apply.... We must forget the whole paraphernalia of social description, demonstration, expostulation, approbation, condemnation. We have to say to ourselves, How would I myself live in this proposed society? How long would it be before I went stark staring mad?”
—William Golding (b. 1911)