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 SP IND PH 7.2-9.7,PK/6 RL X16
Special Indicator pH paper 7.2-9.7, pack of 6 rolls (each 5 meters length) in dispensers with color charts. Gradation of scale: <7.2 - 7.2 - 7.5 - 7.8 - 8.1 - 8.4 - 8.7 - 9.0 - 9.3 - 9.7 - >9.7
CTL Scientific Supply Corp WATOR, 50 PIECES
WATOR - Indicator paper for the determination of water in butter according to DIN 10 311. Box of 50 pieces (each piece 78 x 40 mm). On contact with water WATOR develops dark-blue spots, the size and number of which is correlated to the distribution of the water in the butter.
Sigma Aldrich Fine Chemicals Biosciences Nylon Net filter 10.0 um p
Nylon filters are compatible with a broad range of solvents. Two types are available 1) Nylon Membrane filters with pore sizes ranging from 0.20 to 1.2 181m and 2) Woven Net filters with mesh openings ranging from 5 to 180 181m. Our 5 181m Nylon Woven Net filter (NY054700) is commonly used in the automotive industry for cleanliness analysis. features Benefits.Wide range of pore sizes available .Resistant to aggressive solvents ApplicationsParticle Removal and Clarification Solvent filtration Particle Analysis Paint Monitoring Automotive Cleanliness Analysis
Innovative Research Inc Hmn Ttl PK Kit
Human Total Prekallikrein ELISA Kit - This human prekallikrein total antigen assay is intended for the quantitative determination of total prekallikrein antigen in human plasma. For research use only. Strip well format. Reagents for up to 96 tests. Human prekallikrein will bind to the monoclonal capture antibody coated on the microtiter plate. Prekallikrein and kallikrein will react with the antibody on the plate. After appropriate washing steps, anti human prekallikrein 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 prekallikrein. Color development is proportional to the concentration of total prekallikrein in the samples.
Hach Company SC4500 Ctrl mA Out 1 anlg pH S
SC4500 Controller-mA Output-1 analog UPW pH/ORP Sensor-100 - 240 VAC-without power cordIncludes Controller-Non-Claros Embedded Prognosys-without power cord includes mounting hardware
MSC Value Collection Gage Block, Square, 0.148 in, Grade 0, Steel
This gage block is a precision measuring tool. It is square, made of steel, and has a size of 0.148 inches with a Grade 0 accuracy. The block includes NIST certification, ensuring high quality and reliable measurements.
- Square shape.
- Grade 0 accuracy.
- Constructed from steel.
- 0.148 inch size.
- Includes NIST certification.