TRM - 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® TUNE07P

Importance of the Topic

A reliable multi‐element calibration solution is fundamental for accurate quantitative analysis in atomic spectrometry and other analytical methods. The ASTASOL® TUNE07P standard provides traceable reference values for over 25 elements at low microgram per liter levels. Its certified concentrations and uncertainties support method validation, quality control, and compliance with international measurement standards.

Objectives and Overview

This document describes the preparation, characterization, and intended use of ASTASOL® TUNE07P, an aqueous calibration solution. It details the primary compounds, assigned concentrations with expanded uncertainties, traceability chain, homogeneity, stability, and recommended handling procedures.

Methodology and Instrumentation

The solution is gravimetrically prepared from high‐purity primary substances (purities ≥ 99.5 %) dissolved in 2 % HNO3 and ultrapure water. Certified reference materials traceable to NIST SRMs ensure accurate calibration. Key analytical techniques for characterization 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
• Electroanalytical Methods

Main Results and Discussion

Assigned element concentrations at 20 °C range from 3.00 ± 0.03 µg/L to 35.00 ± 0.35 µg/L. Expanded uncertainties (k = 2) reflect combined effects of weighing, purity, and volumetric steps. Total trace impurities remain below 0.04 µg/L. Homogeneity tests confirmed uniform distribution, and stability studies guarantee shelf life up to six months when stored between 5 °C and 30 °C.

Benefits and Practical Applications

The multi‐element solution facilitates:

• Calibration of AAS, ICP‐OES, ICP‐MS, and related techniques
• Quality assurance in environmental, pharmaceutical, and industrial laboratories
• Method development and validation for trace metal analysis

The wide element coverage and low uncertainties improve analytical confidence and regulatory compliance.

Future Trends and Potential Uses

Advances may include expanding element panels, developing matrix‐matched calibrators for complex samples, and integrating dried or solid‐matrix standards for field deployment. Enhanced certification protocols using isotope dilution and primary ratio methods could further reduce uncertainties.

Conclusion

ASTASOL® TUNE07P provides a robust, traceable multi‐element calibration solution with well‐defined concentrations and uncertainties. Its validated homogeneity and stability support diverse analytical workflows and regulatory demands.

Reference

No external literature references were provided.