1. Codex Alimentarius CODEX STAN 193: 2010, Codex General Standard for Contaminants and Toxins in Food and Feed. http://www.codexalimentarius.net/download/standards/17/CXS_193e.pdf.
2. ISO Guide 33: 2000, Uses of Certified Reference Materials, International Standards Organization, Geneva.
3. Isotope-dilution ICP?MS for trace element determination and speciation: from a reference method to a routine method?
4. The use of isotope dilution mass spectrometry for the certification of standard reference materials
5. Characterisation of reference materials by isotope dilution mass spectrometry