Total‐Reflection X‐Ray Fluorescence Analysis of Alcoholic and Non‐Alcoholic Beverages

Abstract

This chapter explores the uses and capabilities of total-reflection X-ray fluorescence (TXRF) for analyzing alcoholic and non-alcoholic beverages. There are already many publications on multi-element analysis of beverages using TXRF. The objects of analysis can be classified as follows: wine, carbonated soft drinks, strong alcoholic beverages, juices, and beers. TXRF has such advantages as a small amount of the required sample, simple sample preparation and quantitative assessment of the contents using the internal standard method, and the low cost of instrumental systems. The most distributed techniques of sample preparation are direct analysis and acid digestion. The matrix decomposition procedure provides values of the surface density and thickness of the residue, corresponding to the thin layer criterion, for most elements. It is determined that at the constant element concentrations in a sample, the value of the analytical signal is different due to the absorption effect.