Developed and emerging countries seek to position themselves in the energy market through green hydrogenGreen hydrogen (GH) or renewable hydrogen (RH), an important vector in the generation of clean and renewable energy. The reuse of waste and its maximum optimization are central elements in the industries’ commitment to a more sustainable environment. The integrity of hydrogen quality within production processes is paramount when delivering GH that meets rigorous purity standards, which depends on the application of versatile and reliable analytical techniquesAnalytical techniques, such as chromatographic techniques, highlighting the gas chromatographyChromatography. Thereby, this chapter deals with the technological outlook of the GH hydrogen production and the main analytical techniquesAnalytical techniques for its quality controlQuality control.