| reagent strip |
The strip consists of a polymer with repeating carboxylic acid groups. 14 The dissociation of these groups is influenced by the ionic strength of the medium, so that when the strip is dipped into the urine, there is a release of protons that decreases the pH of the strip. The change in pH is detected with a coloured indicator (eg, bromthymol blue) and the colour noted against a chart calibrated with urines of known specific gravities. ...
출처: pmj.bmjjournals.com/cgi/content/full/75/880/67
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