Nazifa Ananna: To scientifically analyze the products formed from CO2 reduction, we must first identify which analytical techniques are most applicable. Using an invalid or inappropriate technique(s) will result in the collection of invalid data. HPLC is NOT an applicable technique to use for this application. Gas chromatography IS an applicable technique and you can freely research examples of methods for more information.
When researching new questions, try a keyword search using a Search Engine (i.e. Google) to find many free articles, application notes, white papers and reports with more information. Review the most applicable 'hits' and then refine your search for more applicable documents. Be sure to contact someone with professional experience in using the selected technique for assistance.
Learning HOW to articulate and research a question is one of the most important skills you can learn as a student.
Please research the applicable techniques to see which type of GC method coupled to which type of detector is best suited to your specific application and expected concentration values.