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
CTL Scientific Supply Corp QUANTOFIX COPPER
Test sticks for the semi-quantitative determination of copper (Cu + /Cu 2+ ) in solutions. Gradation of scale: 0-10-30-100-300 mg/l Cu +/2+ 100 strips/box
Alkali Scientific CellPro™ 1.0 ml 96-Well Deep Well Plate, U-Bottom, Square Well, 5/pk, 50/cs
Our deep well plates are compatible with all popular automated research platforms and robotic equipment. The plates have black printed alpha-numeric reference grids, are useful for bacterial cultures, centrifugation (up to 4000 x g), and general sample storage. All plates are produced in a class 100,000 cleanroom facility and are ANSI/SLAS 1-2004 compliant. They can be used with silicone sealing mats and sealing films of various materials (sold separately).
Electron Microscopy Sciences pH Indicator Paper 7.9 - 9.8
The indicator dyes of pH-Fix sticks are substantially bound to the cellulose fibers and as a result the possibility of the color bleeding, even in strongly basic solutions, is avoided. The dyes provide a sharp differentiation between the individual pH values and a clear and easy comparison to the color scale. Measurement of pH value is possible even in unbuffered or very weakly buffered solutions, since the sticks can be left in the solution until the final color change is completed. Test samples are not contaminated by the indicator dyes.
Gradations: 0.2/0.4
CTL Scientific Supply Corp Cyantesmo Test Paper, roll of 5 meter length
CYANTESMO PAPER This test paper allows the quick and easy detection of hydrocyanic acid and cyanides in aqueous solutions and extracts. Limit of sensitivity 0.2 mg/l hydrocyanic acid (HCN) 5 meter roll
Enterprise Technology Solutions Learning Resources Classroom Learning Clock Kit, GR PreK-4,6/ST,Multi
Engage small groups or individual students in time-telling activities with these student clocks. Color-coded hour and minute functions teach children how to tell time. Mini clocks are designed for children ages 5 and up.