General
pH value	9,18 bei 25°C
Shelf life after opening	2 Monate

The NIST-pH buffer solution pH 9.18 from Chauvin Arnoux is a high-precision reference material specifically developed for the calibration and fine-tuning of pH meters and measuring electrodes. The solution ensures a defined pH value of 9.18 at a temperature of 25°C, with a maximum deviation of ± 0.02. This high accuracy makes it particularly suitable for applications in laboratories and industrial environments where reliable and reproducible measurement is required. The buffer solution is traceable to international standards, highlighting its suitability for calibrated measurement processes and quality controls. The ready-to-use solution is delivered in a 125-ml bottle and is immediately usable without additional preparation or dilution.

Applications

The buffer solution pH 9.18 is primarily used for calibrating pH measuring devices, especially in applications covering the alkaline pH range. It serves as a reference point to check the accuracy and stability of measuring electrodes and pH meters. Typical use cases include laboratory environments, the food industry, chemical production, or environmental analysis, where precise pH values are critical. Traceability to international standards enables consistent measurement practices and is often a requirement for certified quality management systems.

Functions and Equipment in Detail

The solution is packaged in a convenient 125-ml bottle, ensuring safe transport and easy handling. The packaging is designed to protect the solution from contamination and evaporation. An official reference material certificate is included in the delivery scope, confirming the traceability and specific characteristics of the solution. This certificate serves as documented proof of the quality and suitability of the buffer solution in quality-controlled processes.

Technology Explained Simply

The pH value of 9.18 lies in the alkaline range of the scale and serves as a reference point for measuring devices operating in this range. The low tolerance of ± 0.02 ensures that the solution functions as a precise calibration method. Traceability means that the production and calibration of the solution are linked to international standards, ensuring comparability and reliability of measurement results across different laboratories and devices. The solution is ready-to-use, meaning it can be directly applied from the bottle into the measuring device without requiring dilution or further preparation.

Compatibility and Accessories

The buffer solution is universally compatible with pH meters and measuring electrodes designed for calibration with standard buffer solutions. It can be used in combination with other buffer solutions of different pH values (e.g. pH 4.01, pH 7.00) to create a complete calibration profile. The solution is used directly from the bottle, with the quantity varying depending on the device type and the manufacturer’s instructions. No special accessories or tools are required to use the solution.

Mounting and Installation

The buffer solution requires no mounting or installation. It is applied directly from the bottle into the measuring device, following the instructions of the respective pH meter or measuring electrode. The bottle is designed for easy opening and closing to ensure shelf life after opening.

Operational Advantages

Using the NIST-pH buffer solution pH 9.18 ensures high measurement accuracy and reproducibility. Traceability to international standards increases the acceptance of measurement results in certified environments. The long shelf life of 18 months before opening and 2 months after opening reduces consumption and the need for frequent reordering. The included certificate enables documented quality assurance, which is particularly important in industrial and laboratory settings.

Delivery Scope

The delivery scope includes 1 x NIST-pH buffer solution in a 125-ml bottle and 1 x official reference material certificate. The solution is ready-to-use and immediately applicable.