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Susumu Kawakubo1, Taichi Omori1, Yasutada Suzuki2

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A novel microtitration system precisely counts titrant droplets for on-site analysis. This method, using capillary flow control, achieves high accuracy for various titration types.

Keywords:
On-site analysisacid consumptioncalciumcopperrivertap watertitration

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Area of Science:

  • Analytical Chemistry
  • Physical Chemistry

Background:

  • Accurate on-site chemical analysis is crucial for various applications.
  • Traditional titration methods can be cumbersome and require specialized equipment.
  • Developing portable and precise analytical tools is an ongoing challenge.

Purpose of the Study:

  • To develop a new microtitration system for precise on-site analysis.
  • To control the dropping rate of titrant for improved accuracy.
  • To evaluate the system's performance across different titration types.

Main Methods:

  • A microtitration system was designed using a laboratory-made micropipette.
  • A capillary tube was inserted to control the titrant dropping rate.
  • Simulated titrations were performed, and analytical performances were evaluated for chelate, redox, and acid-base titrations.

Main Results:

  • The developed microtitration system demonstrated precise titrant droplet counting.
  • A titration error of 3% was observed with 20 droplets in simulated titrations.
  • Pre-addition of titrant improved precision to within 0.5% error.

Conclusions:

  • The new microtitration system offers a precise and potentially portable solution for on-site analysis.
  • The capillary flow control method effectively regulates titrant delivery.
  • The system shows promise for various quantitative chemical analyses, including chelate, redox, and acid-base titrations.