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Updated: May 29, 2025

High Speed Droplet-based Delivery System for Passive Pumping in Microfluidic Devices
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Multichannel Dilution Analysis Using a Single Peristaltic Pump Tube.

Robbie M Huff1, Willis B Jones1, Bradley T Jones2

  • 1Department of Chemistry and Biochemistry, University of North Florida, Jacksonville, Florida, USA.

Applied Spectroscopy
|February 6, 2025
PubMed
Summary
This summary is machine-generated.

Multi-channel dilution analysis (MCDA) offers a new way to calibrate analytical instruments by automatically diluting standards. This method, adapted for ICP-OES and ICP-MS, ensures accurate results across various matrices.

Keywords:
CalibrationICP-MSICP-OESinductively coupled plasma mass spectrometryinductively coupled plasma optical emission spectrometrymatrix-matchingmetals

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Area of Science:

  • Analytical Chemistry
  • Spectroscopy

Background:

  • Multi-channel dilution analysis (MCDA) is a novel calibration technique.
  • Traditional MCDA requires specific pump configurations, limiting its application.

Purpose of the Study:

  • To adapt MCDA for instruments with fewer pump channels.
  • To validate the modified MCDA method for ICP-OES and ICP-MS.

Main Methods:

  • Utilized a single peristaltic pump line to drive solution through a tubing manifold.
  • Applied the modified MCDA to inductively coupled plasma optical emission spectrometry (ICP-OES) and inductively coupled plasma mass spectrometry (ICP-MS).
  • Validated the method using certified reference materials and spiked matrices.

Main Results:

  • Achieved analyte recoveries between 83% and 117% with relative standard deviations around 1%.
  • Demonstrated effective matrix matching for challenging samples (e.g., high ethanol, calcium).
  • Showcased improvements in calibration statistics for ICP-MS.

Conclusions:

  • The adapted MCDA method is a feasible and accurate calibration technique for ICP-OES and ICP-MS.
  • This adaptation overcomes hardware limitations, broadening MCDA's applicability.
  • MCDA provides reliable matrix-matched calibration, enhancing analytical accuracy.