Whatman QM-H from Cytiva is a pure quartz fiber filter for use in testing acidic gases, stacks, flues, and aerosols. Whatman QM-H has low heavy metal content so is well-suited for heavy metals analysis. High stability up to 900°C High filtration efficiency Binder-free Minimal reactivity with biological or chemical components The Whatman range of quartz fiber filters from Cytiva's business also includes Grades QM-A and QM-B for air monitoring applications. Here you can find the certificate: https://www.cytivalifesciences.com/en/de/support/quality/certificatesMeer tonenMinder tonen