pH Paper and other Test Strips
Single-use test materials used to rapidly and semi-qualitatively determine the acidity or alkalinity of liquids or to measure another parameter or substance; may include tests for starch, chlorine, and molybdenum; usually via the use of color-based reactions.
pH Papers, pH strips, pH sticks, and pH test kits are used in laboratory, industrial, and educational environments to qualitatively assess pH levels or monitor acid-base titrations in a range of sample types.pH Buffer reference standards are used for the accurate calibration of pH meters and monitors for far more precise and quantitative pH measurement.
pH Test papers are supplied either as rolls, tear-off strips, or sticks. They are impregnated with indicator dyes that change color at a specific pH. In some products, indicator dyes are covalently linked to cellulose fibers to avoid bleed-out (leaching) and contamination of the test sample.
Some pH papers indicate simple acid or base conditions with a single red-to-blue color change (also called litmus papers). Universal pH papers and strips contain a combination of indicators that cover a range of pH values up to and including 0 to 14 in a single test. The observed color change is checked against a comparison chart supplied with the papers.
Alternatively, for metered assessments of pH, standard or reference pH buffers are used to calibrate pH meters and other electrochemical sensors.
Standard Buffer Characteristics:
• Typically supplied at fixed values of pH 4.01, pH 7.00, and pH 10.01
• May be color-coded for easy and quick identification
• Certified to their nominal pH and accuracy at a specified temperature (typically 20°C)
• Supplied as ready-to-use solutions or concentrates
• Contain antifungals for extended shelf life
MilliporeSigma™ MQuant™ pH Indicator Papers
Measure pH onsite without instruments or extensive preparation
Micro Essential Lab Economical Plastic pH Strips
Offer excellent color separation in the pH range; 50 pH test strips/pack.
Fisherbrand™ Plastic pH Test Strips
Offer excellent color separation in the pH range; 100 pH test strips/vial.
Fisherbrand™ Potassium Iodide Starch Test
Test for the presence of free iodine, chlorine and peroxides in solution
Economical pH Test Strips
Line of pH test strips incorporates the most up-to-date technology.
Eisco™ Litmus Paper
Litmus Paper available as vial of 100.
Cytiva Whatman™ Litmus Blue Test Paper
Impregnated with a mixture of pH indicators, acid-alkali litmus papers assume a color specific to sample pH upon contact with a sample. Whatman™ Litmus Blue Test Paper provides rapid determination of pH values and has a variety of applications in laboratories and industry.
Cytiva Whatman™ pH Indicators
Provides rapid determination of pH values. Whatman™ pH Indicators are impregnated with a mixture of several indicators that change color when they come in contact with a particular sample solution.
Decon™ Phenazine pH Test Paper
Packaged in a convenient plastic dispenser with comparative color chart
Fisherbrand™ Hydrion™ Jumbo Insta-Chek Display pH Papers
General purpose pH papers with distinct color match for ranges 0 to 13.
Micro Essential Lab Hydrion™ Insta-Chek™ pH Test Paper 0.0 to 13.0
Easy, instant pH determination
Micro Essential Lab pH Test Paper, in Vial
Immediate, accurate pH test strips cut and packaged in vials
LaMotte™ Insta-Test™ Single and Multi-Factor Test Strips
For water quality testing