Development of a Dilute-and-Shoot Sample Preparation Method for Trace and Mineral Element Determination in Wine by ICP-MS

Indianapolis, IN

Wine is a widely consumed alcoholic beverage globally. Trace element determination in wine samples is important because such information can be used for establishment of quality (e.g. taste, aroma), safety (e.g. exposure to toxic elements), and authenticity of wine. The goal of this work is to investigate the dilute-and-shoot sample preparation approach for determination of mineral and trace elements in wine by ICP-MS. This is with a view of taking advantage of the Kinetic Energy Discrimination (KED) and High Matrix Introduction (HMI) capabilities of the ICP-MS to reduce interferences from the matrix. With regards to method development impact of matrix on method accuracy was evaluated through spike recovery using five red wine samples and two white wine samples. Generally spike recovery for the red wine samples ranged from 70-125% across the board for most elements. However, greater than 200% recovery was observed for Ca, K, Na, Mg (mineral elements) in red wines. Additionally, spike recovery was generally high and random for all of the element in the white wine samples.