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4. Certificate of Analysis, Standard Reference Material 2942, Relative Intensity Correction Standard for Fluorescence Spectroscopy: Ultrviolet Emission, National Institute of Standards and Technology, 2009. 〈https://www-s.nist.gov/srmors/view_detail.cfm?srm=2942〉.
5. Certificate of Analysis, Standard Reference Material 2943, Relative Intensity Correction Standard for Fluorescence Spectroscopy: Blue Emission. National Institute of Standards and Technology, 2009. 〈https://www-s.nist.gov/srmors/view_detail.cfm?srm=2943〉.