Urine pH determination

The indicator zone for pH contains a mixture of selected acid-base indicators. Most use two acid-base indicators – methyl red and bromothymol blue, or phenolphthalein. This ensures a pH reading in the 5-9 range by changing color from orange (acidic pH) to green to blue (alkaline pH). The reading is possible with an accuracy of 0.5.

Related Articles

 * Urine/chemical test
 * Bromthymol Blue