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Related Experiment Videos

3D printed LED based on-capillary detector housing with integrated slit.

Farhan Cecil1, Min Zhang1, Rosanne M Guijt2

  • 1Australian Centre for Research on Separation Science (ACROSS), School of Physical Sciences, University of Tasmania, Private Bag 75, Hobart 7001, Australia.

Analytica Chimica Acta
|April 4, 2017
PubMed
Summary

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Researchers developed a 3D printed photometric detector with an integrated 70 µm slit, suitable for micro-capillary analysis. This cost-effective 3D printed detector shows promise for sensitive photometric detection in capillary electrophoresis.

Area of Science:

  • Analytical Chemistry
  • Instrumentation
  • 3D Printing Technology

Background:

  • Photometric detection is crucial for quantitative analysis in capillary-based separation techniques.
  • Traditional photometric interfaces can be expensive and lack flexibility for micro-scale applications.
  • Fused Deposition Modelling (FDM) 3D printing offers a potential solution for fabricating custom, low-cost analytical devices.

Purpose of the Study:

  • To design and fabricate a 3D printed photometric detector body with an integrated slit for LED-photodiode positioning.
  • To optimize the 3D printing process for achieving narrow slit dimensions suitable for micro-capillaries (down to 50 μm i.d.).
  • To evaluate the performance of the 3D printed detector for photometric detection and compare it with a commercial interface.

Main Methods:

Keywords:
3D printingCapillary electrophoresisFlow injection analysisFused deposition modellingLED on-capillary detectorLight emitting diode

Related Experiment Videos

  • Fabrication of a photometric detector body using FDM 3D printing with an integrated slit.
  • Optimization of printing orientation to achieve a 70 μm slit width.
  • Characterization of photometric detection linearity, effective pathlength, and stray light using various capillary diameters.
  • Assessment of tubing alignment reproducibility using flow injection analysis (FIA).
  • Benchmarking against a commercial interface for capillary electrophoresis (CE) separation of metal complexes.

Main Results:

  • A 70 μm slit was successfully printed, enabling detection in capillaries down to 50 μm i.d.
  • Linear photometric response was observed from 632 to 40 mAU.
  • Effective pathlength and stray light varied with capillary size.
  • Tubing alignment demonstrated good reproducibility with a relative standard deviation (RSD) of 1.9% in peak height.
  • The 3D printed detector achieved limits of detection comparable to a commercial interface for CE separations.

Conclusions:

  • 3D printing is a viable method for fabricating functional photometric detector housings with integrated micro-slits.
  • The developed detector offers a cost-effective and adaptable alternative for photometric detection in microfluidic and capillary-based analyses.
  • The V-shaped alignment feature ensures reliable tubing positioning, crucial for reproducible measurements.