A novel ICP-MS/MS approach for the analysis of vanadium in glucose magnesium sulfate injection to meet the requirement of USP<232>/<233>

Importance of the Topic

Precise determination of vanadium in glucose magnesium sulfate injections is vital for meeting USP<232>/<233> guidelines on elemental impurities, ensuring patient safety and regulatory compliance in parenteral drug products.

Objectives and Study Overview

This study evaluates a novel ICP-MS/MS tandem mass spectrometry approach to quantify trace levels of vanadium in high–chloride and magnesium matrices, benchmarking single-quadrupole versus triple-quadrupole performance.

Methodology and Instrumentation Used

Sample preparation followed USP<232>/<233> protocols, using vanadium standards in 2% HCl and filtration prior to analysis. An Agilent 8900 triple-quadrupole ICP-MS/MS operated at 1 amu resolution on both quadrupoles was employed. Reaction gases tested included oxygen, helium and ammonium (NH3). Key operating parameters were: RF power 1550 W, sampling depth 8.0 mm, carrier gas 0.9 L/min, makeup gas 0.2 L/min, and integration times of 0.3–0.6 s.

Main Results and Discussion

Single-quadrupole ICP-MS showed signal drift (2.1–3.0 μg/L for sequential runs) due to Cl and Mg interferences. In contrast, ICP-MS/MS with NH3 exhibited low detection limits (0.002 μg/L), a background equivalent concentration of 8 ppt, and 2.6% RSD at 0.15 μg/L. Precursor ion scans confirmed that ClO+ and SOH+ interferences at m/z 51 were effectively removed by mass filtering and reaction with NH3, while analyte ions were monitored via the mass-shifted product 51V → 51V14N1H2.

Benefits and Practical Applications

• Enhanced selectivity and sensitivity for vanadium in complex matrices.
  
• Compliance with USP<232>/<233> requirements for parenteral products.
  
• Robust interference removal enables reliable trace analysis in pharmaceutical quality control.

Future Trends and Potential Applications

Emerging tandem ICP-MS/MS technologies and reactive gas chemistries will expand capabilities for other challenging elemental analyses. Integration with automated workflows and advanced data processing may further streamline pharmaceutical impurity testing.

Conclusion

ICP-MS/MS with NH3 reaction gas on a triple-quadrupole platform offers a powerful solution for accurate vanadium determination in high-matrix pharmaceutical injections, delivering superior sensitivity, precision, and interference control.

Instrumentation

Agilent 8900 Triple Quadrupole ICP-MS/MS with collision/reaction cell and ICP-MS MassHunter software.

References

• 1. S. Wu, X. Zeng, X. Dai. Spectrochimica Acta Part B, 2016, 123, 129.
  
• 2. USP Chapter <232> Elemental Impurities Procedures, USP 40–NF 35, First Supplement.
  
• 3. B. Jackson. J. Anal. At. Spectrom., 2018, 33, 897.