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Using Carbon Isotopes to Fight the Rise in Fraudulent Whisky

  • Gordon T Cook (a1), Elaine Dunbar (a1), Brian G Tripney (a1) and Derek Fabel (a1)


A major threat to the Scotch whisky industry is the sale of counterfeit single malt whiskies with purported distillation years in the 19th and early- to mid-20th centuries. However, these are often much more recent spirits, distilled in the latter part of the 20th or first part of the 21st centuries. These sales impinge upon the reputation of auction houses, retailers, brand owners and distillers. The atmospheric testing of nuclear weapons in the 1950s and early 1960s has enabled a precise calibration curve to be created, however, there are several reasons why this may not be appropriate for establishing the year of whisky distillation. We have created a 14C calibration curve derived from known-age, single malt whiskies for the period 1950–2015 that enables whisky distilled during the period from 1955 onwards to have the distillation year determined to within 1–3 years for certain periods. However, because of the shape of the curve, two possible age ranges are often possible. The correct range can often be determined from a further plot of δ13C values against distillation year, which shows a trend of decreasing values through time. Several examples are given of the determination of both genuine and fake products.


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Ashok, PC, Praveen, BB, Dholakia, K. 2011. Near infrared spectroscopic analysis of single malt Scotch whisky on an optofluidic chip. Optics Express 19(23):2298222992.
Aylott, R. 2013. Chapter 16: Analytical strategies supporting protected designations of origin for alcoholic beverages. Comprehensive Anal Chem 60:409438.
Aylott, RI, Clyne, AH, Fox, AP, Walker, DA. 1994. Analytical strategies to confirm Scotch whisky authenticity. Analyst (Lond.) 119(8):17411746.
Aylott, RI, MacKenzie, WM. 2010. Analytical strategies to confirm the generic authenticity of Scotch whisky. J Inst Brewing 116(3):215229.
Bronk Ramsey, C. 2017. OxCal ver. 4.3.2.
Cook, GT, Ainscough, LAN, Dunbar, E. 2015. Radiocarbon analysis of modern skeletal remains to determine year of birth and death—a case study. Radiocarbon 57:327336.
Cook, GT, Dunbar, E, Black, SM, Xu, S. 2006. A preliminary assessment of age at death determination using the nuclear weapons testing 14C activity of dentine and enamel. Radiocarbon 48:305313.
Craig, H. 1957. Isotopic standards for carbon and oxygen and correction factors for mass spectrometric analysis of carbon dioxide. Geochim Cosmochim Acta 12(1–2):133149.
Dunbar, E, Cook, GT, Naysmith, P, Tripney, BG, Xu, S. 2016. AMS 14C dating at the Scottish Universities Environmental Research Centre (SUERC) Radiocarbon Dating Laboratory. Radiocarbon 58(1):923.
Hua, Q, Barbetti, M, Rakowski, AZ. 2013. Atmospheric radiocarbon for the period 1950–2010. Radiocarbon 55(4):20592072.
Lachenmeier, DW. 2016. Chapter 21: Advances in the detection of the adulteration of alcoholic beverages including unrecorded alcohol. In: Downey, G, editor. Advances in food authenticity testing. Woodhead Publishing. p. 565584.
Loader, NJ, Santillo, PM, Woodman-Ralpha, JP, Rolfe, JE, Hall, MA, Gagen, M, Robertson, I, Wilson, R, Froyd, CA, McCarroll, D. 2008. Multiple stable isotopes from oak trees in southwestern Scotland and the potential for stable isotope dendroclimatology in maritime climatic regions. Chemical Geology 252(1–2):6271.
Lopes, JS, Pinto, RE, Almendra, ME. 1975. Variations in the level of carbon-14 in wines of the Douro region from 1950 to 1974. Agronomia Lusitana 36(3):223234.
Meier-Augenstein, W, Kemp, HF, Hardie, SML. 2012. Detection of counterfeit scotch whisky by H-2 and O-18 stable isotope analysis. Food Chem 133(3):10701074.
Scotch Whisky Association. 2019.
Scott, EM, Naysmith, P, Cook, GT. 2017. Should archaeologists care about 14C inter-comparisons? Why? A summary report on SIRI. Radiocarbon 59(5):15891596.
Scott, EM, Naysmith, P, Cook, GT. 2018. Why do we need 14C inter-comparisons? The Glasgow 14C inter-comparison series, a reflection over 30 years. Quaternary Geochronology 43:7282.
Slota, PJ, Jull, AJT, Linick, TW, Toolin, LJ. 1987. Preparation of small samples for 14C accelerator targets by catalytic reduction of CO. Radiocarbon 29(2):303306.
Spalding, KL, Buchholz, BA, Bergman, L-E, Druid, H, Frisen, J. 2005. Age written in teeth by nuclear tests. Nature 437:333334.
Stuiver, M, Reimer, PJ, Reimer, RW. 2018. CALIB 7.1.
Ubelaker, DH, Parra, RC. 2011. Radiocarbon analysis of dental enamel and bone to evaluate date of birth and death: perspective from the southern hemisphere. Forensic Sci Int 208:103107.
Zoppi, U, Skopec, Z, Skopec, J et al. 2004. Forensic applications of C-14 bomb-pulse dating. Nuclear Instruments and Methods in Physics Research B 223:770775.


Using Carbon Isotopes to Fight the Rise in Fraudulent Whisky

  • Gordon T Cook (a1), Elaine Dunbar (a1), Brian G Tripney (a1) and Derek Fabel (a1)


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