Laboratory pH Buffer

Q: What is the difference between technical, NIST/DIN and certified pH buffer solutions?

Technical pH buffers:These are highly precise buffer solutions for calibration and verification that come with a METTLER TOLEDO certificate. Measurement uncertainty ranges from ±0.01 to ±0.05 pH units.NIST/DIN pH buffers:Buffers prepared according to the recommendation of the National Institute of Standards and Technology (NIST) and the German Institute for Standardization (DIN). They also have a certificate from METTLER TOLEDO. Measurement uncertainty ranges from +/- 0.010 to +/- 0.015 pH units.Certified pH buffers:Selection of pH buffers that are verified and certified by a DAkkS (Deutsche Akkreditierungsstelle, German Accreditation Body) accredited laboratory in accordance with ISO/IEC 17025.

Q: What are the tolerances of METTLER TOLEDO pH buffers?

NIST/DIN pH buffers ±0.010 to ±0.015 pH unitsCertified (DAkkS) pH buffers ±0.02 pH unitsTechnical pH buffers ±0.01 to ±0.02 pH units *The tolerances are only for the buffer and not for the entire pH measurement of a sample.**Technical pH buffers at pH 11.00 may have an uncertainty of up to ±0.05 pH units.

pH Buffers for Calibration to Ensure Compliance and Traceability

A pH buffer is a reference solution of known pH value used for sensor calibration to achieve accurate pH readings across various applications. Our comprehensive portfolio ranges from high-precision NIST/DIN and DAkkS-accredited solutions to a complete set of technical buffers for extreme value verification, including a non-borate pH 9.00 formula. The technical pH buffers feature a shelf life of a minimum of 1 year for consistency. To minimize contamination risk, choose small bottles or single-use sachets.

Advantages of METTLER TOLEDO’s pH buffers

Get Accurate pH Readings

pH readings are only as accurate as the solutions used for calibration. Our comprehensive portfolio of pH calibration and verification solutions satisfies every precision requirement. From technical buffers to pH buffers certified by an accredited body, we have the most suitable buffer for every application.

Minimize Contamination Risk

For high accuracy, uncontaminated buffers are of utmost importance. Our sachets ensure a fresh solution with the appropriate volume to perform a calibration directly in the sachet for maximum ease of use. 250mL bottles enable easy handling and reduce contamination risk in comparison to bulk containers.

Browse and Download Your Documentation

A lot-specific certificate of analysis is available for every calibration solution, documenting accuracy and providing traceability to national metrology institutes for quality control. To support compliance with regulations, each SDS (Safety Data Sheet) and label contains information according to GHS (Globally Harmonized System) in local languages.

Manage Your Sachet Stock

Thanks to the open magazines of the dispenser box, the number of remaining sachets can be easily determined, even from a distance. A reorder indicator helps to prevent running out of stock.

Certified by an ISO 17025 Accredited Lab

Our DAkkS-certified pH buffers are verified by an independent, ISO/IEC 17025 accredited laboratory. This provides them with confirmation of the pH value and associated uncertainty, making them a suitable choice for highly regulated industries.

Achieve Top Accuracy with NIST/DIN Buffers

Our NIST/DIN pH buffers conform to DIN 19266 and NIST values. These are specified to three decimal places with a low measurement uncertainty of ±0.010 to ±0.015 pH.

A Complete System Provider

METTLER TOLEDO provides entire electrochemistry systems - from meters and sensors to calibration solutions and software. Benefit from automatic buffer recognition or temperature dependency tables for automatic accurate temperature compensation.

Useful Related Links

Application Specific Sensors

Accurate measurements start with the correct pH sensor. Our broad electrode portfolio complements the meter and solutions range and ensures that you have a perfectly suited sensor for every application.

Reliable Meters

We offer a variety of durable benchtop and portable meters to meet your needs for compliance and routine measurements, including economical models for tight budgets.

Good Electrochemistry Practice

Measuring pH in the laboratory is a common and important analysis. Good Electrochemistry Practice™ guides you through the entire product lifecycle to detect potential risks and find the right tools to address them. This helps to ensure that you achieve accuracy in all your critical pH measurements.

Expert Application Support

Our pH Competence and Support Center offers easy access to dedicated application specialists for pH, ORP, ion, conductivity and DO measurements. They provide expert support, convey know-how and collaborate with product management to help ensure a high degree of success in all your critical electrochemical analyses.

Meter and Sensor Accessories

Enhance and customize your measuring system with our range of effective pH accessories to simplify your workflow, reduce error risk and make it easier to obtain the accuracy you need. Each meter has interfaces that allow you to connect multiple pH accessories and peripherals such as printers and stirrers according to your application needs.

pH Calibration: A Handy How-To Guide

pH calibration is essential in ensuring the reliability and quality of measurements. In this video Hans, a METTLER TOLEDO employee will walk you through the process of calibration. Learn everything from why it matters to critical considerations to take during the process, get step-by-step instructions on how to calibrate a sensor.

Unlock Service Excellence - Maximize Your Efficiency

800 METTLER (800 638 8537)

Call Service

FAQs

What is the difference between technical, NIST/DIN and certified pH buffer solutions?

Technical pH buffers:
These are highly precise buffer solutions for calibration and verification that come with a METTLER TOLEDO certificate. Measurement uncertainty ranges from ±0.01 to ±0.05 pH units.
NIST/DIN pH buffers:
Buffers prepared according to the recommendation of the National Institute of Standards and Technology (NIST) and the German Institute for Standardization (DIN). They also have a certificate from METTLER TOLEDO. Measurement uncertainty ranges from +/- 0.010 to +/- 0.015 pH units.
Certified pH buffers:
Selection of pH buffers that are verified and certified by a DAkkS (Deutsche Akkreditierungsstelle, German Accreditation Body) accredited laboratory in accordance with ISO/IEC 17025.

What are the tolerances of METTLER TOLEDO pH buffers?

NIST/DIN pH buffers ±0.010 to ±0.015 pH units
Certified (DAkkS) pH buffers ±0.02 pH units
Technical pH buffers ±0.01 to ±0.02 pH units

*The tolerances are only for the buffer and not for the entire pH measurement of a sample.

**Technical pH buffers at pH 11.00 may have an uncertainty of up to ±0.05 pH units.

I want to use fresh buffers in small quantities. Do you offer this option?

We offer buffer sachets (small volume packaging of 20mL) that are easy to use and guarantee fresh solutions for every calibration.

Should I stir the pH buffer when performing a calibration?

When measuring the pH value of a sample, gently stir the sample to ensure that it is homogeneous. It is important that calibration and measurement are done under the same conditions.

Search suggestions

Laboratory pH Buffer

pH Buffers for Calibration to Ensure Compliance and Traceability

Buffer Certificates and Safety Data Sheets

Buffer Certificates