Development of a procedure for the multi-element determination of trace elements in wine by ICP-MS

An inductively coupled plasma mass spectrometric (ICP-MS) procedure has bee n developed for the determination of trace elements in wine. The procedure consists in simple 1+1 dilution of the wine and semi-quantitative analysis (without external calibration) using In as internal standard. Thirty-one el ements at concentrations ranging from 0.1 mg mL(-1) to 0.5 ng mL(-1) can be determined by ICP-MS analysis with and without digestion. It was investiga ted whether a matrix effect observed for EtOH in the wine matrix can be ove rcome by application of a micro-concentric nebulizer with a membrane desolv ator (MCN 6000). The results obtained for the MCN 6000 are compared with th ose obtained by use of a conventional Meinhard nebulizer. It is shown that the observed matrix effect can only be compensated by use of an internal st andard for the Meinhard nebulizer, but not for the MCN 6000. Results for IC P-MS are compared with those obtained by total reflection X-ray fluorescenc e spectrometry (TXRF).