CRM Sodium (Na) - Aqueous calibration solution ASTASOL® AN90351H

Importance of the Topic

This certificate describes a high-purity aqueous calibration solution for sodium analysis. Reliable calibration materials are essential for accurate quantitative measurements in atomic and molecular spectrometry as well as electroanalytical methods. Certified reference materials ensure method traceability to SI units and support quality assurance in research and industrial laboratories.

Objectives and Overview of the Certificate

The document provides certification data for ASTASOL AN90351H, an aqueous sodium standard. It defines composition, concentration, uncertainty, production details and intended applications. The goal is to offer users a fully characterized reference solution for calibration and validation of analytical procedures.

Methodology and Sample Preparation

The primary sodium source is high-purity sodium chloride (NaCl, 99.999 ). Gravimetric preparation under controlled conditions ensures direct traceability to the SI kilogram. Certified concentration and uncertainty were confirmed by independent analysis against a NIST standard.

Used Instrumentation

• ICP-OES for quantification and certification of sodium concentration
• AAS, ICP-OES and ICP-MS for trace impurity screening

Main Results and Discussion

The certified sodium concentration is 1000 mg per liter with an expanded uncertainty of 2 mg per liter at 20 °C. The solution density is 1.0004 g/cm3 over the same temperature. Analysis of trace elements shows that most impurities are below detection limits, providing a matrix with minimal interference. Homogeneity and stability studies confirm performance over a five-year shelf life when stored properly.

Benefits and Practical Applications

The certified reference solution supports:

• Calibration and validation of atomic absorption and emission spectrometry methods
• Standardization in ICP-OES and ICP-MS applications
• Quality control in environmental, pharmaceutical and industrial laboratories
• Electroanalytical and molecular absorption spectrometry procedures

Future Trends and Applications

Development of multi-element calibration solutions and increased automation in certification workflows may further enhance traceability and reduce preparation uncertainties. Advances in low-level detection will drive demand for ultra-high-purity standards and expanded impurity profiling.

Conclusion

ASTASOL AN90351H offers a well-characterized, SI-traceable sodium calibration solution with low uncertainty and proven stability. Its broad applicability across spectrometric and electroanalytical techniques makes it a valuable tool for laboratories seeking reliable calibration materials.