CRM Tin (Sn) - Aqueous calibration solution ASTASOL® AN90551FN

Importance of the topic

In quantitative analysis, reliable calibration standards are essential to achieve accurate and traceable results. Certified reference materials (CRMs) such as aqueous tin solutions provide a benchmark for method validation and instrument calibration across various analytical techniques.

Objectives and overview

This certificate describes the production and certification of ASTASOL® AN90551FN, an aqueous calibration solution containing tin at a nominal concentration of 1000 mg/L. The document outlines its composition, certified values, uncertainty, and intended use in spectrometric and electroanalytical methods.

Methodology and instrumentation

• Gravimetric preparation ensuring direct traceability to the SI unit kilogram.
• Verification of the tin concentration and its uncertainty by complexometric titration against SRM NIST 928.
• Impurity profiling in the solution by atomic absorption spectrometry (AAS), atomic emission spectrometry (AES), inductively coupled plasma optical emission spectrometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICP-MS).

Main results and discussion

• Certified tin concentration: 1000 ± 2 mg/L at 20 °C (equivalent to 970 ± 3 mg/kg considering density).
• Solution density: 1.0307 ± 0.0005 g/cm³ at 20 °C.
• Trace metal impurities are present at levels below quantification limits, confirming high purity suitable for calibration purposes.
• The material demonstrates homogeneity and stability over a five-year shelf life when stored between 5–30 °C and handled according to instructions.

Benefits and practical applications of the method

• Provides a high-purity, SI-traceable standard for calibrating AAS, AES, ICP-OES, ICP-MS, molecular absorption, and electroanalytical methods.
• Reduces systematic errors and ensures comparability of analytical results between laboratories.
• Simplifies compliance with quality management systems and accreditation requirements.

Future trends and potential applications

Advances in CRM development may include matrix-specific calibrants for complex sample types, miniaturized and on-line standards integration with microfluidic and lab-on-a-chip systems, and digital certification data embedded in instruments for automated quality control. Expansion of certified analytes and coupling with emerging analytical technologies will further support precision testing in environmental, food, pharmaceutical, and industrial sectors.

Conclusion

ASTASOL® AN90551FN offers a rigorously certified, stable, and homogenous tin calibration standard. Its well-documented traceability, low uncertainty, and broad method compatibility make it a valuable resource for reliable analytical measurements. Proper storage and handling ensure consistent performance throughout its shelf life.