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
Innovative Research Inc Hmn Ttl FXII Kit
Human Total Factor XII ELISA Kit - Human Total Factor XII ELISA Kit from Innovative Research is intended for the quantitative determination of total Factor XII antigen in human plasma and serum. Strip well format. Reagents for up to 96 tests. Human Factor XII will bind to the affinity purified capture antibody coated on the microtiter plate. Factor XII and XIIa will react with the antibody on the plate. After appropriate washing steps, antihuman Factor XII primary antibody binds to the captured protein. Excess primary antibody is washed away and bound antibody, which is proportional to the total Factor XII present in the samples, is reacted with the secondary antibody. Following an additional washing step, TMB substrate is used for color development at 450nm.
Alkali Scientific pH Indicator Strips 100/Box, 7 14
Test strips supplied in a classic flat storage box with an integrated color scale for quick and reliable visual comparison of results. Designed for convenient laboratory use, the compact box keeps strips protected and organized while allowing easy dispensing during routine testing procedures. Each strip provides consistent response for dependable measurements in laboratory, educational, and research environments. The clear printed color chart on the box helps users quickly interpret results without additional reference materials. These strips are suitable for general analytical applications where fast qualitative or semi quantitative testing is required. For best performance and stability, store the strips at a controlled temperature between 4–30 °C and keep the container closed when not in use to protect from moisture and environmental exposure.
Innovative Research Inc Hmn Ttl PAI1 Kit
Human Total PAI-1 ELISA Kit - This human plasminogen activator inhibitor type 1 (PAI-1) total antigen assay is for the quantitative determination of total PAI-1 in human plasma in citrate, EDTA or heparin, serum, cell culture media, tissue lysates and other biological fluids. For research use only. Strip well format. Reagents for up to 96 tests. Human PAI-1 will bind to the monoclonal capture antibody coated on the microtiter plate. Free, latent, and complexed PAI-1 will bind to the plate. After appropriate washing steps, polyclonal anti-human PAI-1 primary antibody binds to the captured protein. Excess primary antibody is washed away and bound antibody is reacted with peroxidase conjugated secondary antibody. Following an additional washing step, TMB substrate is used for color development at 450nm. A standard calibration curve is prepared along with the samples to be measured using dilutions of human PAI-1. Color development is proportional to the concentration of PAI-1.