Characterization of HCl Primary Reference Gas Standards for Emission MonitoringIris de Krom, Sophie Schout, Luuk Meijer, Evtim Efremov, Stefan Persijn, Gerard Nieuwenkamp and Adriaan van der VeenEPJ Web Conf., 352 (2026) 03003DOI: https://doi.org/10.1051/epjconf/202635203003