CRM Tellurium (Te) - Aqueous calibration solution ASTASOL® AN905910C

Significance of the Topic

Accurate calibration solutions underpin reliable quantitative analysis across atomic spectrometry and electroanalytical techniques. Certified reference materials provide metrological traceability, ensure comparability of results, and support method validation in research, quality control, and regulatory compliance.

Objectives and Overview

This certificate describes aqueous calibration solution ASTASOL® AN905910C containing tellurium at a certified concentration of 10000 mg/L. It outlines production, certification, homogeneity, stability, and intended analytical applications.

Methodology and Instrumentation

• Gravimetric preparation using ultra-pure Te metal (99.999 %) for direct SI-traceable concentration.
• Concentration verification by inductively coupled plasma optical emission spectrometry (ICP-OES).
• Cross-validation against independent SRM NIST 3156 tellurium standard.
• Trace impurity profiling by atomic absorption spectrometry (AAS), ICP-OES, and inductively coupled plasma mass spectrometry (ICP-MS).

Main Results and Discussion

The solution exhibits a certified tellurium concentration of 10000 ± 20 mg/L (expanded uncertainty, k = 2) and density of 1.0785 ± 0.0005 g/cm³ at 20 °C. Trace element levels were all below detection limits, confirming high purity. Homogeneity tests ensured consistent composition across bottles, and stability studies validate a five-year shelf life under recommended storage conditions.

Benefits and Practical Applications

• Calibration for AAS, AES, ICP-OES, and ICP-MS techniques.
• Support for molecular absorption and selected electroanalytical methods.
• SI traceability enhances confidence in quantitative results and compliance with regulatory standards.

Future Trends and Potential Uses

With rising demand for ultra-trace elemental analysis, CRMs like ASTASOL® AN905910C will remain critical for advanced methods such as single-cell elemental profiling and isotope dilution mass spectrometry. Development of matrix-matched and multi-element standards may further expand application scope.

Conclusion

ASTASOL® AN905910C delivers a high-purity, SI-traceable calibration solution for tellurium analysis, combining rigorous certification, stability, and broad applicability. It underpins accurate, reproducible measurements essential for diverse analytical workflows.

Reference

• ISO Guide 31:2000, Reference Materials – Contents of Certificates and Labels.
• ČSN EN ISO 17034:2017, General Requirements for the Competence of Reference Material Producers.
• NIST SRM 3156, Tellurium Standard Solution, National Institute of Standards and Technology.
• ČSN EN ISO/IEC 17025:2018, General Requirements for the Competence of Testing and Calibration Laboratories.
• ISO 9001:2016, Quality Management Systems – Requirements.