CRM Copper (Cu) - Aqueous calibration solution ASTASOL® AN8015C

Significance of the Topic

Certified reference materials play a critical role in ensuring accuracy and traceability in quantitative analysis of aqueous samples. They support reliable calibration of instruments and validation of methods across atomic spectrometry and related techniques.

Study Overview and Objectives

This document certifies an aqueous copper calibration solution (ASTASOL® AN8015C) produced and accredited under ISO 17034:2017. Its primary goal is to provide a well-characterized standard for method calibration and quality control in trace analysis of copper in acidic media.

Methodology and Instrumentation

• Gravimetric preparation for direct SI traceability (kg).
• Complexometric titration against NIST SRM 928 for concentration verification.
• Independent analysis with NIST SRM 3114.
• Trace impurity screening by atomic absorption spectrometry (AAS), inductively coupled plasma optical emission spectrometry (ICP-OES), and inductively coupled plasma mass spectrometry (ICP-MS).

Main Findings and Discussion

• Certified copper concentration: 100.0 mg/L with an expanded uncertainty of ±0.2 mg/L (k=2) at 20 °C.
• Density: 1.0107 g/cm³ ±0.0005 at 20 °C.
• Impurity levels for over 60 elements were all below detection limits or at trace levels, ensuring minimal matrix interference.
• Demonstrated homogeneity and stability over a five-year shelf life when stored properly.

Benefits and Practical Applications

• Reliable calibration standard for AAS, AES, ICP-OES, ICP-MS, molecular absorption, and selected electroanalytical methods.
• Supports accreditation requirements and routine quality assurance in industrial and research laboratories.
• Facilitates method validation, interlaboratory comparisons, and regulatory compliance.

Future Trends and Potential Uses

Ongoing development of multi-element CRMs and digital certification data will enhance automated calibration workflows. Integration with emerging microfluidic and field-based spectrometers could extend on-site analysis capabilities. Advanced uncertainty evaluation and data sharing platforms may further streamline method development and compliance.

Conclusion

ASTASOL® AN8015C provides a robust and traceable copper calibration solution with well-defined purity, stability, and minimal impurities, supporting accurate quantification in diverse analytical applications. Use this CRM according to storage and handling instructions to maintain certified performance.