How to Develop Automated Gas Measurement System
- Automatated Hydrogen Gas Measurement Apparatus Developed in Sakai Group
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Download GC.pdf
This document is a detailed manual, originally drafted in 2007, describing the methodology we employ for analyzing H2 and O2 evolution during photochemical or electrochemical water splitting. The technique was initially developed in 1993 to automate manual measurement processes and minimize time-consuming workups. The primary goal was to streamline data collection, allowing researchers to dedicate more time to literature review and manuscript preparation. The method utilizes a continuous flow of Ar or another inert gas at a precisely controlled rate (e.g., 10 mL/min) through the reaction vessel. The effluent gas is directed to a sampling loop connected to an injection valve for gas chromatography (GC) analysis. While this manual covers the fundamental principles of the system, it should be noted that our most recent setup has been further upgraded. This includes implementing RS-232C communication between the control PC and a commercial integrator, which significantly enhances the accuracy of our quantitative analysis.