Elemental profiling has been proposed as an approach for geographic authentication of grapes and wines. Recently, both inductively coupled plasma-mass spectrometry (ICP-MS), inductively coupled plasma-optical emission spectroscopy (ICP-OES), and microwave plasma atomic emissions spectroscopy (MP-AES) have been used to measure a range of elements at varying concentrations in grapes and wines. Using these approaches, we have demonstrated that grape/wine elemental profiles vary across a range of geographic scales, i.e., across different countries, different American Viticultural Areas (AVAs), and different regions within an AVA. However, winemaking and storage conditions can subsequently alter the elemental profiles of the grapes making it critical that effects of processing on the elemental profiles of the finished wines be fully evaluated. Further, our studies have demonstrated that sample preparation methods for wine analysis by ICP-MS should be carefully monitored to ensure accurate measurement of elements in the wine. As a result, development of approaches using elemental profiles to establish authenticity of grapes and wines from different cultivars and growing regions must take into consideration these complex interrelationships involving vineyard site, processing and storage conditions, and sample preparation and analysis methods.<br/><br/>

Elemental profiling to establish authenticity of grapes and wines

254th National Meeting (2017)

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