Incredibly Powerful, Remarkably Efficient Quantitation

Importance of the Topic

The growing need for rapid, reliable, and high-throughput quantitative analysis in fields ranging from food safety and agriculture to clinical toxicology and pharmaceutical quality control has driven the development of compact and robust LC-MS/MS platforms. The Agilent Ultivo LC/TQ system addresses key pain points in modern laboratories by combining a reduced footprint with enhanced performance, ease of use, and minimal maintenance requirements, enabling efficient targeted quantitation workflows for diverse small-molecule applications.

Objectives and Study Overview

This presentation showcases several application studies that demonstrate the versatility of the Ultivo LC/TQ system and associated MassHunter Productivity software. Three main case studies are highlighted:

• Quantitation of underivatized amino acids in animal feed matrix.
• Analysis of eight small-molecule drugs in human serum down to low-pg/mL levels.
• Screening of synthetic fentanyls in biological fluids and multiclass pesticide analysis in cannabis extracts.

Methodology and Instrumentation

Sample preparation protocols were simplified to expedite throughput and reduce manual steps: acid hydrolysis and dilution for amino acids in feed; protein precipitation for serum drug analysis; dilution and filtration for urine and serum in fentanyl screening; and extraction followed by LC separation for pesticides in cannabis. Chromatographic separation employed Poroshell HILIC-Z or C18/Phenyl-Hexyl columns at elevated temperatures (25–55 °C) with tailored gradients to achieve sub-minute to sub-10-minute run times.

The Ultivo LC/TQ system coupled with MassHunter Productivity software provided:

• Real-time diagnostics and electronic feedback minimizing downtime.
• Optimized MRM methods with extensive in-house and published transition libraries.
• Automated data processing, calibration curve generation, and report template integration.

Main Results and Discussion

Amino acids: Underivatized amino acids were resolved on a HILIC-Z column with limits of quantification (LOQs) in the single- to double-digit ppb range, linearity (R² > 0.99), and reproducibility (RSD < 5%). Mixed-mode acquisition enabled detection of isobaric species such as hydroxyproline without standards.

Small-molecule drugs: Eight drugs, including desomorphine, midazolam, and fluoxetine, were quantified in serum with LOQs down to 0.001 ng/mL. Accuracy across seven replicates remained within 10 % of nominal, and RSDs were typically below 5 % at therapeutically relevant levels.

Synthetic fentanyls: A panel of 12 novel opioids and precursors was screened in diluted urine and serum with actual LOQs of 50–100 pg/mL (equivalent to 500–1000 pg/mL pre-dilution). Calibration curves from 1 pg/mL to 500 ng/mL achieved R² > 0.99 and clear separation of isobaric analogs.

Pesticides in cannabis: Sixty-six pesticides plus aflatoxins were analyzed at 10 ppb and as low as 0.1 ppb for selected compounds. Composite EICs showed clear peak shapes and reproducible quantitation (RSD < 15 %), meeting stringent state-level action limits.

Benefits and Practical Applications

The Ultivo LC/TQ platform provides a compelling solution for high-throughput laboratories by:

• Minimizing bench space requirements compared to traditional triple-quads.
• Reducing maintenance and gas consumption through an integrated EMF-feedback ion source.
• Simplifying method development with extensive transition libraries and streamlined software workflows.
• Enabling rapid adoption for routine targeted quantitation in food safety, clinical testing, forensic toxicology, and pesticide residue analysis.

Future Trends and Applications

Continued expansion of digital MRM libraries and AI-driven method optimization will further reduce setup times and enhance the detection of emerging contaminants. Integration with remote diagnostics and cloud-based data management is expected to support decentralized testing in regulatory and field environments. The adaptability of mixed-mode acquisition foreshadows broader use in metabolomics and residue screening where structural analogs and isobars present analytical challenges.

Conclusion

The Agilent Ultivo LC/TQ system, combined with MassHunter Productivity software, delivers robust, sensitive, and efficient targeted quantitation across multiple application areas. Its small footprint, automated diagnostics, and straightforward workflows meet the demands of modern high-throughput laboratories, providing reliable data quality and operational simplicity.

Reference

Not applicable