pH Paper and Buffers
Thermo Scientific™ Orion™ Standard All-in-One™ pH Buffer Kit
Work with ease using this color-coded pH buffer kit that includes three buffers, storage solution and a storage bottle.
Laboratory Buffer Solution, pH 4.01, Red, Reagecon™
Designed for use in laboratory pH measurement. Reagecon™ Laboratory Buffer Solution, pH 4.01, Red is tested at 20°C to an accuracy level of ±0.02. This calibration and control buffer is specially formulated to ensure its stability and is supplied with a detailed Certificate of Analysis.
Thermo Scientific™ Orion™ pH Buffer Individual Use Pouches
Ensure fresh, ready-to-use standards for pH calibration with these pH Buffer individual use pouches.
Redox Buffer, 220mV, Reagecon™
Used for testing, calibration and verification of redox/ORP sensors. Redox Buffer, 220mV, Reagecon™ is a ready to use solution of iron salts, including potassium ferrocyanide and tripotassium hexacyanoferrate, for use with reactions with a redox potential of 220mV.
Laboratory Buffer Solution, pH 7.00, Green, Reagecon™
Designed for use in laboratory pH measurement. Reagecon™ Laboratory Buffer Solution, pH 7.00, Green is tested at 20°C to an accuracy level of ±0.02. This calibration and control buffer is specially formulated to ensure its stability and is supplied with a detailed Certificate of Analysis.
Laboratory Buffer Solution, pH 9.21, Blue, Reagecon™
Designed for use in laboratory pH measurement. Reagecon™ Laboratory Buffer Solution, pH 9.21, Blue is tested at 20°C to an accuracy level of ±0.02. This calibration and control buffer is specially formulated to ensure its stability and is supplied with a detailed Certificate of Analysis.
pH 4.01 Technical Color-Coded Buffer Solution at 25°C, Reagecon
Easy-to-use, tested, certified, NIST traceable, and shelf-stable, color-coded buffer solution.
Cytiva Whatman™ pH Indicators
Provides rapid determination of pH values. Whatman™ pH Indicators are impregnated with a mixture of several indicators that change color when they come in contact with a particular sample solution.
pH 4.00 Phthalate-Free Buffer Solution at 20°C, Reagecon
Tested, certified, NIST traceable, and shelf-stable buffer solution.
Standard Buffer Solution pH 4.01, WTW™
With a high accuracy: ±0.02 pH, this standard buffering solution is traceably certified to PTB/NIST and therefore safe for use.
pH 9.00 Buffer Solution at 25°C, Reagecon
Tested, certified, NIST traceable, and shelf-stable buffer solution.
pH 7.00 Buffer Solution at 25°C, Reagecon
Tested, certified, NIST traceable, and shelf-stable buffer solution.
Maleate, 0.2M buffer soln., pH 5.5, Thermo Scientific™
CAS: 3105-55-3 Molecular Formula: C4H2NaO4 Molecular Weight (g/mol): 137.05 MDL Number: MFCD00070246 InChI Key: VRVKOZSIJXBAJG-ODZAUARKSA-L PubChem CID: 91658932 IUPAC Name: sodium;(Z)-4-hydroxy-4-oxobut-2-enoate;trihydrate SMILES: [Na+].[O-]C(=O)\C=C/C([O-])=O
Thermo Scientific™ Borate, 0.5M buffer soln., pH 8.0
CAS: 1330-43-4 MDL Number: MFCD00163147
Succinate, 0.2M buffer soln., pH 6.0, Thermo Scientific™
CAS: 150-90-3 Molecular Formula: C4H4Na2O4 Molecular Weight (g/mol): 162.052 MDL Number: MFCD00002789 InChI Key: ZDQYSKICYIVCPN-UHFFFAOYSA-L PubChem CID: 9020 ChEBI: CHEBI:63675 IUPAC Name: disodium;butanedioate SMILES: C(CC(=O)[O-])C(=O)[O-].[Na+].[Na+]
Thermo Scientific™ Sodium borate, 0.5M buffer soln., pH 8.5
CAS: 1330-43-4 MDL Number: MFCD00081185
Thermo Scientific™ Orion™ ROSS™ All-in-One™ pH Buffer Kit
Maintain pH electrodes more effectively with Thermo Scientific™ Orion™ ROSS™ All-in-One™ pH Buffer Kits.
Lovibond™ PD250 Reagent Dispenser Refill: DPD Free Chlorine
For use SC450 Chlorine and pH colorimeter, MC500 colorimeter and SP600 spectrophotometer
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 which change colour when dipped into the solution under test. In some products, the indicator dyes are covalently linked to the cellulose fibres to avoid bleed-out (leaching) and contamination of the test samples.
Some pH papers indicate simple acid or base conditions with a single red-blue colour change (also called litmus papers). Universal pH papers and strips contain a mix of indicator dyes which cover a range of pH values up to and including 0 to 14 in a single test. The observed colour change is checked against a comparison chart normally supplied with the papers.
Alternatively, for accurate assessment of pH, standard (reference) pH buffers are manufactured to very high degrees of precision and are used for the quantitative calibration of pH meters, electrodes and other electrochemical sensors. Standard buffers are:
- Typically supplied at fixed values of pH4.01, pH7.00 and pH10.01
- May be colour-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