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The pH strip is used for the determination of pH. The four colors on each strip correlate to. a pH range of 0 to 14. In the presence of fluid with normal pH (7.0), the strip willshow. the four colors of yellow-orange, orange, olive green, and yellow. In the presence of acidic. fluids (pH 5), the strip will display the four colors of yellow-orange, orange, tan and. yellow. The pH of gastric fluid is normally acidic.
To perform this simple test, all you need is a roll of testing pH paper (preferably test paper in right pH range using small increments), a plastic spoon and some fresh saliva. IonLife's 15 foot roll of pH paper at $13.75 (comes with dispenser and instruction)