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Health Dictionary

Reliable, easy-to-read patient information on common medical conditions — written in plain language, free of jargon, and grounded in current evidence. Browse the most frequent diagnoses, understand what they mean for everyday life, and learn which steps and questions help you have a focused conversation with your doctor.

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Nitrazine

Introduction

Overview

Overview

Nitrazine or Phenaphthazine papers are pH strips used in medicine.

Interpretation

Interpretation

More sensitive than litmus paper, Nitrazine indicates pH in the range of 4.5 to 7.5. The test is often used to test vaginal pH during late pregnancy to determine the breakage of the amniotic sac. While vaginal pH is normally acidic, a pH above 7.0 indicates that the amniotic sac has ruptured.[1] Nitrazine papers can also be used to perform a fecal pH test to diagnose intestinal infections or other digestive problems.[2] They can also be used to test the pH of the human eye. [3]

References

References

  1. ↑ “Nitrazine paper”.
  2. ↑ “Point-of-Care Testing, Fecal pH Measurement”.
  3. ↑ “NITRAZINE PAPER: DETERMINATION OF NORMAL OCULAR pH” (PDF).

Editor-In-Chief: C. Michael Gibson, M.S., M.D. [1]