New Ultrasound-Assisted Extraction Sample Preparation Procedure for the Fast Determination of Total Sn in Canned Tomatoes by HG-ICP OES

An analytical method with no need for laborious sample preparation before determining the total Sn in canned tomatoes by hydride generation (HG) coupled to inductively plasma optical emission spectrometry (ICP OES) was developed. The ultrasound-assisted extraction various reagents (acidic media: HCl, HNO3, CH3COOH or aqua regia and alkaline: TMAH) that could replace traditional wet digestion presence of a concentrated HNO3-H2O2 mixture tested compared. Tin generated directly from prepared solution reaction 1% NaBH4 via prior acidification 1 mol L−1 HCl. effect pretreatment HG-ICP OES measurements on signal also examined. best results were obtained as medium, followed simple two-fold dilution extract combined addition L-cysteine. developed characterized detection limit at 0.74 ng g−1, precision better than 6%, trueness, verified analyte spike-and-recovery test, 98.4–104%. Its usefulness demonstrated determination seven tomatoes.