TRN - Ag, Al, Ba, Be, Bi, Ce, Co, Cs, Cu, Ga, Ho, In, Li, Mg, Mn, Ni, Rh, Sc, Sr, Ta, Tb, Tl, U, Y, Zn - Aqueous calibration solution ASTASOL® TUNE07E

Importance of the Topic

Aqueous multi-element calibration solutions play a crucial role in modern analytical chemistry by ensuring accurate quantification of trace metals in environmental, industrial and research samples. Certified reference materials (CRMs) with defined concentration values and traceability to primary standards are essential for method validation, instrument calibration and quality assurance in atomic spectrometry and related techniques.

Objectives and Study Overview

This identification sheet describes the preparation, characterization and intended use of the ASTASOL® TUNE07E aqueous calibration solution. Key objectives include:

• Defining assigned concentrations and uncertainties for 25 analytes in a 2% HNO₃ matrix.
• Demonstrating traceability through an unbroken calibration chain to NIST SRMs.
• Ensuring homogeneity and stability over the specified shelf life.

Methodology and Instrumentation

The calibration solution was prepared gravimetrically using high-purity primary compounds (purity ≥ 99.5%) and sub-boiling distilled acids. Concentration assignments and expanded uncertainties (k = 2) were based on precise mass measurements at 20 °C. Traceability was established via comparison with a series of ANALYTIKA® CRMs (AN 9001 through AN 9069), themselves traceable to corresponding NIST SRMs.

Applied Instrumentation

Typical analytical techniques for which this solution is intended include:

• Atomic Absorption Spectrometry (AAS)
• Atomic Emission Spectrometry (AES)
• Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES)
• Inductively Coupled Plasma Mass Spectrometry (ICP-MS)
• Molecular Absorption Spectrometry
• Selected Electroanalytical Methods

Main Results and Discussion

The calibration solution contains 25 elements at concentrations between 3.00 and 35.00 µg/L with expanded uncertainties of approximately 1 % (k = 2). Key concentration levels include:

• Be at 35.00 ± 0.35 µg/L
• Zn at 20.0 ± 0.2 µg/L
• Cu and Ni at 15.00 ± 0.15 µg/L
• Al, Ga, Mg at 10.0 ± 0.1 µg/L
• Ag and Mn at 6.00 ± 0.06 µg/L
• Trace elements Bi, Ce, Cs, Ho, In, Rh, Ta, Tb, U, Y at 3.00 ± 0.03 µg/L

Homogeneity tests confirm consistent composition across production batches, while stability studies support a one-year shelf life under recommended storage conditions.

Benefits and Practical Applications

Using a single multi‐element solution simplifies calibration routines and reduces potential errors associated with multiple standard preparations. The broad element coverage suits laboratories performing environmental monitoring, industrial process control, pharmaceutical quality assurance and academic research. High purity and rigorous traceability guarantee reliable analytical performance across a range of spectrometric methods.

Future Trends and Potential Applications

Advances in miniaturized and field-deployable spectrometers will drive demand for stable, easy-to-use CRMs. Emerging applications include on-site monitoring of water quality, real-time industrial process analytics and coupling with hyphenated techniques for speciation studies. Further developments may focus on extended element ranges, matrix-matched standards and lower uncertainty levels to support ultra-trace analysis.

Conclusion

ASTASOL® TUNE07E provides a versatile, certified multi-element calibration solution with well-defined concentrations and uncertainties. Its traceability, homogeneity and stability characteristics make it a reliable tool for a wide variety of atomic spectrometry and electroanalytical methods, contributing to improved data quality and streamlined laboratory workflows.

Reference

No external literature references were provided in the original identification sheet.