CRM Mercury (Hg) - Aqueous calibration solution ASTASOL® AN7024N

Significance of the Topic

Aqueous calibration solutions with certified mercury content are vital for accurate quantification of trace mercury in environmental and industrial samples. Certified reference materials ensure traceability, consistency and compliance with regulatory standards across analytical laboratories.

Objectives and Overview

This document certifies ASTASOL® AN7024N, an aqueous calibration solution containing 10.00 mg/L mercury. Its purpose is to provide a stable, homogenous CRM for calibration and validation of diverse analytical methods.

Methodology

The solution is prepared gravimetrically using 99.999% pure metallic mercury dissolved in 5% HNO3, with ultrapure water. Concentration and uncertainty (10.00 ±0.05 mg/L, k=2) are established via gravimetric techniques and verified by complexometric titration against NIST SRM 928. Homogeneity and stability tests confirm reliability over a one-year shelf life under controlled storage.

Used Instrumentation

• High-precision analytical balances
• Complexometric titration apparatus
• Atomic Absorption Spectrometry (AAS)
• ICP-OES and ICP-MS for trace impurity analysis

Main Results and Discussion

The certified concentration at 20 °C is 10.00 ±0.05 mg/L (9.77 ±0.07 mg/kg based on density 1.0238 ±0.0005 g/cm³). Impurity profiling shows most trace elements below detection limits, ensuring matrix purity suitable for calibration.

Benefits and Practical Applications

• Provides SI-traceable calibration for mercury analysis
• Improves accuracy and comparability in AAS, AES, ICP-OES, ICP-MS, molecular absorption and electroanalytical methods
• Facilitates method validation and routine quality control

Future Trends and Prospects

Emerging developments may include multi-element aqueous CRMs with lower detection limits, enhanced stabilization strategies, and integration of digital certification tools for efficient laboratory data management.

Conclusion

ASTASOL® AN7024N delivers a rigorously certified, stable, and pure mercury standard solution, supporting high-precision analytical workflows and ensuring regulatory compliance.

Reference

ASTASOL® AN7024N Certificate, Analytika, spol. s r.o., Version 01, 04.10.2023