pH Standards: Calibration, Storage, and Maintenance Made Easy

pH Standard Solutions

Laboratory Standard Solutions for pH, Conductivity, Ion Concentration, Dissolved Oxygen and ORP

Please choose the Buffer, Standard or Electrolyte:

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pH Buffer
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pH Electrolyte
Online Store
Conductivity standard

Laboratory pH Buffer

pH Electrolytes and Maintenance Solutions

Conductivity Standards

Traceable technical buffers, certified buffers and high-precision NIST/DIN buffers for your regular pH calibration, available in handy bottles or easy-to-use sachets.
pH Storage and maintenance solutions ensure accurate readings and maximize sensor life.
NIST traceable standards cover a wide range of conductivity ranges, and provide easy and accurate calibration and verification of your sensor.
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Solution for Ion Selective Electrodes
ORP Buffer
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Dissolved Oxygen Standard

Solutions for Ion-Selective Electrodes

Laboratory ORP Buffers

Dissolved Oxygen Standard

Electrolytes, ionic strength adjustment solutions, and calibration standards ensure accurate ion concentration determinations.
ORP/Redox buffers offer the highest possible precision to ensure compliance and traceability. They verify a sensor easily and accurately.
Zero oxygen tablets enable an easy standard preparation and are ideal for sensor calibration, verification and conditioning at low dissolved oxygen levels.
Online Store
pH Buffer

Traceable technical buffers, certified buffers and high-precision NIST/DIN buffers for your regular pH calibration, available in handy bottles or easy-to-use sachets.

Online Store
pH Electrolyte

pH Storage and maintenance solutions ensure accurate readings and maximize sensor life.

Online Store
Conductivity standard

NIST traceable standards cover a wide range of conductivity ranges, and provide easy and accurate calibration and verification of your sensor.

Online Store
Solution for Ion Selective Electrodes

Electrolytes, ionic strength adjustment solutions, and calibration standards ensure accurate ion concentration determinations.

ORP Buffer

ORP/Redox buffers offer the highest possible precision to ensure compliance and traceability. They verify a sensor easily and accurately.

Online Store
Dissolved Oxygen Standard

Zero oxygen tablets enable an easy standard preparation and are ideal for sensor calibration, verification and conditioning at low dissolved oxygen levels.

Please choose the Buffer, Standard or Electrolyte:

Online Store
pH Buffer
Online Store
pH Electrolyte
Online Store
Conductivity standard

Laboratory pH Buffer

pH Electrolytes and Maintenance Solutions

Conductivity Standards

Traceable technical buffers, certified buffers and high-precision NIST/DIN buffers for your regular pH calibration, available in handy bottles or easy-to-use sachets.
pH Storage and maintenance solutions ensure accurate readings and maximize sensor life.
NIST traceable standards cover a wide range of conductivity ranges, and provide easy and accurate calibration and verification of your sensor.
Online Store
Solution for Ion Selective Electrodes
ORP Buffer
Online Store
Dissolved Oxygen Standard

Solutions for Ion-Selective Electrodes

Laboratory ORP Buffers

Dissolved Oxygen Standard

Electrolytes, ionic strength adjustment solutions, and calibration standards ensure accurate ion concentration determinations.
ORP/Redox buffers offer the highest possible precision to ensure compliance and traceability. They verify a sensor easily and accurately.
Zero oxygen tablets enable an easy standard preparation and are ideal for sensor calibration, verification and conditioning at low dissolved oxygen levels.
Online Store
pH Buffer

Traceable technical buffers, certified buffers and high-precision NIST/DIN buffers for your regular pH calibration, available in handy bottles or easy-to-use sachets.

Online Store
pH Electrolyte

pH Storage and maintenance solutions ensure accurate readings and maximize sensor life.

Online Store
Conductivity standard

NIST traceable standards cover a wide range of conductivity ranges, and provide easy and accurate calibration and verification of your sensor.

Online Store
Solution for Ion Selective Electrodes

Electrolytes, ionic strength adjustment solutions, and calibration standards ensure accurate ion concentration determinations.

ORP Buffer

ORP/Redox buffers offer the highest possible precision to ensure compliance and traceability. They verify a sensor easily and accurately.

Online Store
Dissolved Oxygen Standard

Zero oxygen tablets enable an easy standard preparation and are ideal for sensor calibration, verification and conditioning at low dissolved oxygen levels.

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FAQ

Why should pH buffer, standard and electrolyte solutions be used?

Accurate solutions are the foundation of good measurement results. High quality solutions should always be used for sensor calibration and maintenance. We guarantee maximum traceability by providing individual test certificates for every solution. Our expansive offering will ensure measurement precision and compliance in regulated industries while increasing uptime by extending the life of your sensors. Find the proper solutions for determination of pH, conductivity, ion concentration, ORP and dissolved oxygen.

How can I optimize the use of my pH buffer, standard and electrolyte solutions?

The quality of a solution is only guaranteed for unopened bottles that have not yet expired.

The following tips will help optimize the use of pH buffer, standard and electrolytes solutions after opening and while in use in the laboratory. Fresh calibration solutions minimize the measurement uncertainty and thus optimize the reproducibility of results:

  • Note the date on the bottle when the pH buffer, standard and electrolyte solutions are opened for the first time.
  • Keep the bottles sealed tightly at all times
  • Never pour dispensed pH buffer, standard and electrolyte solution back into the original bottle.
  • Ensure that bottles containing calibration solution are not contaminated.
  • Replace pH buffer, standard and electrolyte solutions that have reached the expiry date or may be contaminated.

Where can a certificate or a material safety data sheet for solutions be obtained?

The certificates of all calibration solutions and many electrolytes can be downloaded at www.mt.com/buffer. The respective material safety datasheets are available at www.mt.com/msds.

What is reference electrolyte?

The reference electrolyte ensures a stable signal transmition. It closes the electric loop by. Due to its high ion concentration, the reference electrolyte conducts the electronic signal from the reference element (mainly Ag/AgCl) to the measured medium and thus closes the electronic circuit of the pH measurement system.

How should I clean my pH sensor?

Your pH sensor should be cleaned regularly. Reduced slope and/or offset or slow response time are an indication that your sensor needs cleaning. Fats, oils, and grease should be cleaned with a non-ionic surfactant solution or methanol. Proteins should be cleaned with a Pepsin-HCl cleaner solution. After cleaning, rinse the electrode with deionized water, recondition it in 3 mol/L KCl and then store in the InLab® Storage solution.

What calibration points should I use?

Calibration should cover the range of the desired measurement values. The most common pH sensor calibration method is two-point calibration.

What should I store my sensor in?

pH glass sensors need to be kept moist at all times. If an electrode dries out during storage, a regeneration procedure is required to restore the hydrated glass layer and the reference junction in order to make the sensor operable. As a general rule, store your pH sensor in the same solution as the reference electrolyte of the sensor. In most cases this is a 3 mol/l KCl solution. Sensors with a bridge electrolyte should be stored in the electrolyte of the outer electrolyte compartment.

Know the Risk of Your pH Measurement
Ion Selective Electrode Guide – Theory and Practice
How to Measure pH in Small Samples
pH Toolbox for Life Sciences
pH Theorie Guide
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