An aliquot is the fraction or measured part of a sample or specimen that is removed and placed in a different container for testing. For purposes of reporting, the amount of aliquot used in a given test is "the amount (weight or volume) of sample subjected to an analysis," or, "if the analytical method requires the prior use of an independent preparative method, [it] is the amount of sample subjected to the preparative method prior to actual analysis of the sample."
- National Center for Radiological Health (1967). Radioassay Procedures for Environmental Samples. p. A-4. https://books.google.com/books?id=xIUvAAAAYAAJ&pg=RA1-PA4.
- Baratta, E.J. (1994). Manual of Food Quality Control: 16. Radionuclides in Food. Food and Agriculture Organization of the United Nations. pp. 123. ISBN 9789251035788. https://books.google.com/books?id=4HOGwg0YqwMC&pg=PA123.
- U.S. Environmental Protection Agency (March 2019). "Appendix A. Data Element Dictionary (DED)" (PDF). SEDD Specification Version 5.2. https://www.epa.gov/sites/default/files/2019-05/documents/sedd_spec_v5-2-march_2019_508.pdf. Retrieved 21 September 2022.