General
pH value	9,180
Deviation	± 0,050
Bottle content	25 ml
Number of vials per pack	10

The COFRAC-certified pH buffer solution pH 9.180 from Chauvin Arnoux serves as reference material for the calibration and testing of pH measuring devices. The solution is packaged in single-use vials, each with a volume of 25 ml, and is delivered in a pack of 10 vials. It is specifically developed for the precise adjustment and verification of pH measurement systems to ensure traceability and accuracy of measurement results. The pH value of 9.180 at 25 °C is specified with a deviation of ± 0.050, highlighting the high precision of the solution. Production follows the recommendations of NIST, IUPAC, and DIN standard 19266, ensuring traceability to international calibration standards. Certification by COFRAC (Comité Français d'Accréditation) confirms the manufacturer's accreditation as a producer of reference materials, with traceability directly to the primary pH calibration standard of the French testing laboratory LNE.

Applications

The buffer solution pH 9.180 is intended for the calibration, qualification, and testing of pH meters, as well as for verifying other pH buffer solutions. It is particularly used in laboratories, industrial process control, and environmental analysis, where high measurement accuracy and documentable traceability are required. Its use in basic range calibration (pH

7) enables verification of sensor electrode functionality under alkaline conditions.

Functions and Equipment in Detail

The solution serves as a stable reference point for calibrating pH measuring devices. The use of single-use vials minimizes the risk of contamination and mixing, thereby increasing the reliability of each individual calibration. The color coding of the vials supports unambiguous identification of different pH values. The solution is classified as reference material and is delivered with certification confirming traceability of measurement results to international standards.

Technology Explained Simply

The pH buffer solution pH 9.180 is a chemical standard that maintains a constant pH value regardless of minor environmental changes. This value is stabilized by the composition of the solution, making it a reliable reference for pH measuring devices. Certification by COFRAC guarantees that production and pH measurement comply with strict international standards. The deviation of ± 0.050 indicates the maximum tolerance range within which the actual pH value lies, which is sufficient for precise calibrations.

Compatibility and Accessories

The buffer solution is suitable for all pH measuring devices requiring calibration at a pH value of 9.180. It can be used in combination with other COFRAC-certified buffer solutions (e.g., pH 4.005 and pH 6.865) to perform multi-point calibration. Use in conjunction with pH measuring devices requiring traceability to international standards is recommended. The solution is not intended for direct use in process plants or at high temperatures.

Installation and Mounting

The buffer solution is delivered in single-use vials and requires no installation. Application involves immersing the measuring electrode into the vial and then calibrating the device according to the operating instructions of the pH measuring device. The vials are designed for direct use without additional preparation.

Operational Advantages

Using the COFRAC-certified buffer solution pH 9.180 ensures high measurement accuracy and documentable traceability. Single-use vials prevent contamination and enable clean, reproducible calibration. COFRAC certification increases acceptance of measurement results in certified environments, such as in the food industry or environmental analysis. Shelf life is 36 months before opening, allowing long-term storage and flexible use.