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
Electron Microscopy Sciences Pehanon pH Indicator Strips 6.0-8.1, 0.5 gradations
pH indicator papers where the indicator and color scale are combined on a single strip. They permit a fast, convenient, and accurate pH determination since it is not necessity to compare color against a scale. This presentation also permits the pH measurement of colored solutions and suspensions, since the color of the test solution acts on the comparison scale in the same manner as on the indicator field.
The indicator zone (unprinted field) is in the center of the strip, the comparison fields above and below same. The strip is submerged in the solution for three seconds so that all colors zone are wetted and the center field changes color according to the pH value of the solution. It is then compared to the color filed bearing the corresponding pH value imprint. An invisible hydrophobic barrier just above the top color field prevents capillary action of the test solution.
pH: 6.0-8.1
Gradations: 0.5
CTL Scientific Supply Corp UNIVERSAL INDICATOR PAPER PH 1
UNIVERSAL INDICATOR PAPER PH 1-11 5 meter roll
Hach Company Chlorine (Total) Test Kit, Model CN-65
The most widely used disinfectant for drinking water, chlorine is also important for sanitizing swimming pools, cooling towers, other industrial equipment, and in the treatment of municipal wastewater. Its measurement and control are vital for both safety and economic reasons.*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company DPD Free Chlorine Reagent Powder Pillows, 25 mL, pk/100
For free chlorine determination by the DPD method. USEPA accepted for reporting drinking water analysis using Hach Method 8021. Ranges: LR: up to 2.00 mg/L; MR: 0.05-4.00 mg/L; HR: 0.1-10.0 mg/L. Sample Sizes: LR: 25 mL; MR: 10 mL; HR: 5 mL. Pack of 100 powder pillows.Boric Acid free!*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company Chlorine (Free and Total) Reagent Set, DPD 5 mL
For determination of Free and Total Chlorine by the DPD method, using visual test kits. Set contains: DPD Free Chlorine PP, pk/100 and DPD Total Chlorine PP pk/100. Range: 0 - 3.5 mg/L as Cl₂. Sample Size: 5 mL.Boric Acid free!*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company Chloride 2 Indicator Powder Pillows, 100 mL, pk/50
Indicator used in the determination of chloride by argentometric titration with silver nitrate. Sample size: 100mL. Pack of 50 Powder Pillows
Hach Company Free & Total Chlorine Test Strips, 0-10 mg/L
The most widely used disinfectant for drinking water, chlorine is also important for sanitizing swimming pools, cooling towers, other industrial equipment, and in the treatment of municipal wastewater. Its measurement and control are vital for both safety and economic reasons. Chlorine exists in water as "free" chlorine (hypochlorite) or "combined" chlorine (chloramines). With Hach Water Quality Test Strips, technicians in the field can test many samples in only a few minutes and make immediate evaluations on-site. No measuring, set-up, clean-up, or chemical handling are necessary. Hach test strips are also used in laboratories all over the world for pre-test screening-to detect the presence of materials that might interfere with lab testing. Contains 50 tests. *This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company Free Chlorine Test Strips, 0-600 mg/L, 100 tests
Hach test strips are manufactured with a unique reagent pad at the tip, using proven chemistries based on standard reference methods. Just dip the strip, wait until color development occurs, and compare the color of the reacted pad to the chart printed on the bottle.*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company Chlorine Reagent Set (Total), Ultra Low Range DPD
For determination of ultralow Total Chlorine concentrations by the DPD Method. Hach Method 8370. USEPA accepted for drinking water and wastewater analysis. Range: 2 - 500 μg/L Cl₂. Reagents are ampuled for stability. Reagent set includes ULR Chlorine Buffer Solution (1.5 mL ampules), DPD Indicator Solution for ULR Chlorine (1.5 mL ampules) and Blanking Reagent for 20 tests.Boric Acid free!*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.
Hach Company Chlorine (Total) Test Kit, Model CN-21P
Chlorine Test Kits are manufactured by Hach Company to ensure compliance with stringent quality control standards. Using the Drop Count Titration method, the CN-21P Chlorine Test Kit is used to determine high concentrations of chlorine in sanitizing applications. 10-200 mg/L; contains 100 tests.*This product has not been evaluated to test for chlorine and chloramines in medical applications in the United States.