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"Do-It-Yourself" reliable pH-stat device by using open-source software, inexpensive hardware and available laboratory
Jovana Z Milanovic1, Predrag Milanovic2, Rastislav Kragic3
1Innovation Centre, Faculty of Technology and Metallurgy, University of Belgrade, Belgrade, Serbia.
Plos One
|March 7, 2018
Summary
Researchers developed a low-cost, open-source pH stat device using readily available components and software. This reliable system enhances experimental work in chemistry and materials science, offering a cost-effective alternative to commercial options.
Area of Science:
- Chemistry
- Materials Science
- Biotechnology
Background:
- Commercial pH stat devices are expensive, limiting accessibility for many research labs.
- Open-source hardware and software offer a pathway to create affordable scientific instrumentation.
- Precise control of pH is crucial for various chemical and biological processes.
Purpose of the Study:
- To design, develop, and validate a reliable and inexpensive open-source pH stat device.
- To integrate open-source software (OpenPhControl) with affordable hardware components.
- To enhance the functionality of a basic pH stat for applications like potentiometric titration.
Main Methods:
- Utilized open-source "OpenPhControl" software and inexpensive hardware including peristaltic and syringe pumps, Arduino, and a step motor.
- Incorporated readily available laboratory devices such as a pH meter, computer, and webcam, alongside 3D printed parts.
- Developed a methodology for system design, component testing, and overall device validation.
Main Results:
- Successfully constructed a functional and reliable open-source pH stat for under 150 EUR.
- Demonstrated precise reagent dosing using both peristaltic and upgraded open-source syringe pumps.
- Validated the device's utility in TEMPO-mediated oxidation of cellulose fibers, showing good repeatability and reagent consumption control.
Conclusions:
- The open-source pH stat provides a significantly more affordable and customizable alternative to commercial systems.
- This device can improve experimental efficiency and accessibility in research requiring precise pH control.
- The modular design allows researchers to adapt and upgrade the system for diverse applications, including potentiometric titrations.