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 1.0-2.8, 0.2/0.3 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: 1.0-2.8
Gradations: 0.2/0.3
CTL Scientific Supply Corp M8 CHEM DETECT PAPER 25SHT
M8 PAPER - CHEMICAL AGENTS LIQUID DETECTORS Pack Size: booklet of 25 strips
Hach Company pH Chemkey Reagents (box of 25)
pH Chemkeys, range 6.3 - 9.0. For SL1000 Portable Parallel Analyzer (PPA).Avoid the hassle of pH probes and calibration in the field with our easy to use colorimetric pH Chemkey. The Hach SL1000 Portable Parallel Analyzer (PPA) performs the same tests with less than half the manual steps. Get highly accurate results, with less opportunity for errors, in a fraction of the time. Up to six parameters, tested in parallel. The SL1000 is a portable colorimeter that provides faster testing by using Chemkey reagents instead of powder pillows. All chemicals and processes are entirely contained inside the Chemkey.
Hach Company Total Chlorine Chemkey Reagents
Total Chlorine Chemkeys, range 0.04 - 10 mg/L Cl2. For SL1000 Portable Parallel Analyzer (PPA). Box of 25.USEPA accepted for reporting in drinking water analysis using Hach Method 10260.
ASI STANDARDS Chlorine in Water Check Standard - Ultra Low Concentration, 25ml
Chlorine in Water manufactured and certified gravimetrically under the guidance of an ISO 9001 quality management system. When applicable, standards are traceable to NIST certified reference materials.ISO 17034 Certified Reference Material
Hach Company Iron (Total) Reagent Set, HR, Digital Titrator
For determination of iron by EDTA Digital Titrator titration. Hach Method 8214. Range: 100 - 1000 mg/L as Fe. Reagent Set Contains: Citrate Buffer Powder Pillows, Sodium Periodate Powder Pillows, Sulfosalicylic Acid Powder Pillows and 0.716 M EDTA Digital Titrator Cartridge. Approximately 40-100 tests.
Hach Company Glycine Reagent, 10%, 29 mL SCDB
Glycine Reagent for Hach Chlorine Dioxide DPD methods. 29 mL Self-Contained Dropping Bottle
Sigma Aldrich Fine Chemicals Biosciences HettichR MIKRO 220/220R ce1EA
compatible with the MIKRO 220R Centrifuge only
Macherey-Nagel Semi-quantitative test strips QUANTOFIX Peroxide 1000, 100 tests
Semi-quantitative test strips for the determination of Peroxide. Ideal for rapid and easy analysis of Peroxide directly on-site. Can be used with test strip reader QUANTOFIX Relax.
Cole-Parmer Hydrion 165/1-12 pH Paper Strips, Range 1-12, 100 Strips/Vial, 10 Vials/Carton
These low-cost disposable vials of pHydrion pH paper strips test pH ranging from 0 to 12. Box of ten vials; 100 strips per vial.
Macherey-Nagel pH test strips, pH‑Fix 0–14, fixed indicator, 100/pk
pH‑Fix strips with chemically bound indicators are the bench mark for pH testing with test strips. The fixation prevents bleeding and therefore contamination of the sample. pH‑Fix 0–14 is also suitable for automatic evaluation with QUANTOFIX Relax.