CRM Aluminium (Al) - Aqueous calibration solution ASTASOL® ANS002N

Significance of the Topic

Aqueous calibration solutions certified as reference materials are fundamental for ensuring accuracy, traceability and comparability in quantitative analytical measurements. They support method validation, instrument calibration and quality control across laboratories engaged in trace metal analysis.

Objectives and Overview

This document certifies ASTASOL® ANS002N, an aqueous calibration solution containing aluminium at a certified concentration of 1000 mg/L. The certificate confirms its preparation according to ISO Guide 31 and its compliance with ISO 17034 accredited production.

Methodology and Instrumentation

The solution’s concentration is determined by direct gravimetric preparation, assuring SI traceability. Verification employs atomic absorption spectrometry (AAS), atomic emission spectrometry (AES) and inductively coupled plasma optical emission spectrometry (ICP-OES) using a short, unbroken calibration chain with a primary CRM.

Used Instrumentation

• Atomic Absorption Spectrometer (AAS)
• Atomic Emission Spectrometer (AES)
• ICP-OES

Key Results and Discussion

The assigned concentration of Al is 1000 ± 5 mg/L (k = 2) at 20 °C. Total trace impurities are below 0.5 mg/L. Homogeneity studies demonstrate uniform composition among bottles, and stability testing verifies integrity over a 5-year shelf life under specified storage conditions.

Benefits and Practical Applications

The certified solution is intended for calibration and validation of methods analyzing aqueous samples, including flame and graphite furnace AAS, AES, molecular absorption techniques and selected electroanalytical procedures. It facilitates method transfer and ensures interlaboratory comparability.

Future Trends and Applications

Advances may include development of multi­element solutions, miniaturized calibration kits for portable analyzers, digital data integration for real-time traceability and greener production routes minimizing acid consumption.

Conclusion

ASTASOL® ANS002N provides a high-purity, SI-traceable aluminium standard with low uncertainty and proven stability, supporting robust analytical workflows and quality assurance in trace metal analysis.