CRM Platinum (Pt) - Aqueous calibration solution ASTASOL® AN90441C

Significance of Topic

The accurate preparation and certification of aqueous calibration standards are critical for reliable quantitative analysis in trace and ultra-trace elemental determinations. Certified reference materials (CRMs) ensure method validation, instrument calibration and compliance with metrological principles, underpinning quality assurance in environmental monitoring, clinical diagnostics and industrial process control.

Objectives and Study Overview

This document presents the certification of ASTASOL® AN90441C, an aqueous platinum calibration solution at 1 000 mg/L. It details the composition, traceability, uncertainty evaluation, storage conditions and intended analytical applications according to ISO Guide 31 and ISO 17034 requirements.

Methodology and Instrumentation

The CRM was prepared gravimetrically from high-purity platinum metal (99.99 %) dissolved in 5 % HCl matrix. Primary value assignment and uncertainty assessment were based on gravimetric techniques traceable to the SI unit kilogram. Verification employed independent comparison with NIST SRM 3140.

Used Instrumentation

• Flame and electrothermal 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 certified concentration of platinum is 1 000 mg/L with an expanded uncertainty of ±2 mg/L (k=2) at 20 °C. The solution density is 1.0113 g/cm³ ± 0.0005. Trace impurity profiling revealed most elements below detection limits, ensuring negligible matrix interferences for calibration. Homogeneity and stability studies confirm reliability over a five-year shelf life and 12-month usage period after first opening under recommended storage conditions.

Benefits and Practical Applications

• Provides high-accuracy calibration for atomic spectrometric techniques.
• Enables method validation and quality control in laboratories.
• Supports regulatory compliance in environmental, pharmaceutical and metallurgical analyses.

Future Trends and Potential Applications

Advances in CRM technology will focus on multi-element aqueous mixtures, lower uncertainty budgets and digital certification metadata. Integration with laboratory information management systems (LIMS) and compatibility with miniaturized, field-deployable spectrometers will extend CRM utility beyond centralized labs.

Conclusion

ASTASOL® AN90441C platinum CRM delivers traceable, well-characterized calibration for high-precision elemental analysis. Its rigorous certification and stability guarantee robust performance across diverse analytical platforms.

Reference

• ISO Guide 31, Reference Materials – Contents of Certificates and Labels.
• ČSN EN ISO 17034, General Requirements for the Competence of Reference Material Producers.
• Manufacturer’s Certificate AN90441C, Analytika®.