CRM Tin (Sn) - Aqueous calibration solution ASTASOL® AN8055C

Significance of the Topic

Calibration standards of certified reference materials (CRMs) are essential for ensuring accuracy and traceability in trace metal analysis. High‐purity aqueous solutions support method validation, quality assurance, and regulatory compliance across laboratories.

Objectives and Overview of the Certificate

This certificate documents the composition, concentration, uncertainty, and storage conditions for ASTASOL® AN8055C, an aqueous tin (Sn) calibration solution intended for atomic spectrometry and selected electroanalytical methods.

Methodology and Instrumentation

• Gravimetric preparation using 99.999 % Sn metal ensures direct SI traceability to the kilogram.
• Concentration verification via complexometric titration against SRM NIST 928.
• Trace impurity screening performed by AAS, ICP-OES, and ICP-MS; reported levels are informative and not for calibration purposes.

Main Results and Discussion

• Certified Sn concentration: 100.0 mg/L ± 0.2 mg/L (k=2) at 20 °C.
• Solution density: 1.0221 g/cm³ ± 0.0005 (k=2) at 20 °C, corresponding to 97.8 mg/kg ± 0.3.
• Trace impurities are generally below detection limits, confirming minimal matrix interference.
• Demonstrated homogeneity and stability over a 5‐year shelf life when stored at 5–30 °C.

Benefits and Practical Applications

• Reliable calibration for AAS, AES, ICP-OES, ICP-MS, molecular absorption spectrometry, and electroanalytical techniques.
• Enhanced analytical accuracy, comparability, and confidence in QA/QC protocols.
• Support for compliance with ISO 9001, ISO/IEC 17025, and ISO 17034 quality standards.

Future Trends and Opportunities

Future developments may include multi‐element CRMs with lower uncertainties, improved gravimetric and titrimetric characterization, and integration of digital certification or blockchain for enhanced data integrity and traceability.

Conclusion

ASTASOL® AN8055C is a well‐characterized, traceable tin standard with low impurity levels and robust stability. Its consistent performance underpins reliable calibration and validation in diverse spectrometric and electroanalytical applications.

References

• ISO Guide 31
• ČSN EN ISO 17034:2017
• ISO 9001:2016
• ISO/IEC 17025:2018