NITRIC ACID ANALPURE®

Importance of High-Purity Nitric Acid in Analytical Chemistry

High-purity reagents are essential for trace-level determinations and accurate quantification in modern laboratories. Nitric acid of Analpure grade serves as a critical acid matrix for sample digestion, instrument calibration and contaminant-free dilutions. Its extremely low levels of chloride, sulfur, phosphorus and metal impurities minimize background signals in sensitive techniques such as ICP-MS and trace elemental analysis.

Objectives and Overview of the Certificate of Analysis

This Certificate of Analysis documents the properties of Nitric Acid ANALPURE®, batch no. 3107, with an assay of 69 % w/w and expiry date of 08/06/2025. It verifies compliance with specification limits for major contaminants and provides quantitative data for over 60 trace elements, ensuring users can apply the product confidently in critical analytical applications.

Methodology and Analytical Approach

Although specific analytical protocols are not detailed, the certificate implies the use of advanced trace metal analysis methods, likely involving acid digestion followed by inductively coupled plasma mass spectrometry (ICP-MS) or atomic spectrometry. Bulk purity parameters (chloride, total sulfur, total phosphorus) and assay values were determined using standardized titration and colorimetric methods aligned with pharmacopeial or ISO guidelines.

Main Results and Discussion

The key findings confirm the product’s compliance with stringent purity criteria:

• Bulk purity: chloride <0.2 ppm, sulfur <0.3 ppm, phosphorus <0.01 ppm
• Assay concentration: 69 % w/w nitric acid
• Trace metals: all measured elements are below their maximum allowable limits, with many analytes undetectable at sub-ppb levels
• Storage instructions emphasize room temperature (15 °C–25 °C) and protection from light

This profile underlines the suitability of ANALPURE® nitric acid for ultra-trace applications, confirming negligible contribution of matrix contaminants to analytical baselines.

Benefits and Practical Applications

The high-purity nitric acid offers multiple advantages:

• Reduced instrument downtime and maintenance due to minimal salt deposits
• Lower detection limits in trace metal and isotopic analyses
• Reliable acid digestion for environmental, pharmaceutical and materials testing
• Consistent performance in quality control labs and regulated workflows

Future Trends and Potential Uses

As analytical techniques evolve towards ever-lower detection thresholds, demand for ultrapure acids will increase. Innovations in reagent production may focus on semiconductor-grade acids, further reduced organic impurities and enhanced stability under varied storage conditions. Emerging fields like nanoparticle analysis and single-cell omics will also benefit from reagents with near-zero background contamination.

Conclusion

This Certificate of Analysis confirms that Nitric Acid ANALPURE® meets rigorous quality standards for both bulk composition and trace impurities. Its validated purity profile ensures it is an ideal reagent for precision-driven analytical laboratories, supporting reliable data generation across diverse applications.