General
pH value	6,865
Deviation	± 0,013
Temperature	25 °C
Bottle content	25 ml
Number of bottles	10

The COFRAC-certified pH buffer solution pH 6.865 from Chauvin Arnoux serves as reference material for the calibration and testing of pH measuring devices. It is supplied in single-use vials, each with a volume of 25 ml, and is specifically designed for precise and traceable adjustment of measuring electrodes and measuring instruments. The solution is directly traceable to the primary pH calibration standard of the French testing laboratory LNE, ensuring traceability of measurement results at an international level. Certification by COFRAC under number 1-5650 confirms the quality and reliability of the product as reference material in the field of analytical measurement technology.

Applications
The pH buffer solution pH 6.865 is primarily used for calibration, qualification, and testing of pH meters. It serves as a stable reference point to check the accuracy of measuring devices and to compensate for aging or damage to the measuring electrode. The solution is particularly suitable for applications in laboratories, the food industry, environmental analysis, and other areas where high measurement accuracy and documentable traceability are required.

Functions and Equipment in Detail
The buffer solution is designed as a concentrated reference solution and enables precise calibration at a pH value of 6.865 ± 0.013 at 25 °C. The deviation of ± 0.013 ensures high accuracy, meeting the requirements of DIN standard 19266 and recommendations from NIST. The solution is supplied in 25-ml vials, each containing a single dose, to avoid mixing or contamination. The packaging contains 10 such vials, providing sufficient quantity for multiple calibrations.

Technology Explained Simply
The traceability of measurement results is ensured by direct linkage to the primary calibration standard of LNE. This means the pH value of the solution can be traced back to a state-recognized reference material, which is crucial for validating measurement results in certified environments. COFRAC certification guarantees that the product was manufactured and controlled according to the strict requirements of ISO Guide 34, confirming the quality and reliability of the reference material.

Compatibility and Accessories
The pH buffer solution pH 6.865 is compatible with all pH measuring devices requiring calibration with standardized buffer solutions. It can be used together with other COFRAC-certified buffer solutions pH 4.005 and pH 9.180 to enable complete calibration across the entire pH range. Use in combination with a pH meter and an appropriate measuring electrode ensures that the measuring devices are correctly adjusted.

Mounting and Installation
The solution requires no mounting or installation. The single-use vials are ready for immediate use. The vials are opened and the solution is poured into the measuring device to perform the calibration. Use follows the instructions of the respective pH measuring device.

Operational Advantages
The use of the COFRAC-certified pH buffer solution pH 6.865 ensures high measurement accuracy and documentable traceability. The single-use vials prevent contamination and enable clean, reproducible calibration. COFRAC certification and traceability to the LNE calibration standard increase the acceptance of measurement results in certified environments and during inspections by external parties.