Study of the impact of bottles material and color on the presence of AsIII, AsV, SbIII, SbV and CrVI in matrix-rich mineral water - Multielemental speciation analysis by HPLC/ICP-DRC-MS

The main aim of the research was to evaluate the impact of the type and color of container and the type of stored water on the concentration of toxic As, Cr and Sb species. The applicability of the method previously developed in our laboratory for the multielemental speciation analysis of five toxic species: As-III, As-V, Cr-VI, Sb-III and Sb-V in drinking water samples using HPLC/ICP-DRC-MS was extended to ensure that it would apply to drinking water samples characterized by mineralization up to 7390 mgL(-1). Two point standard addition calibration was developed to compensate for matrix effects in the samples. Extended procedure was characterized by precision in the range from 1.8% to 5.6% for all analytes. Recovery, calculated based on the analysis of spiked real water samples at concentration level of analytes - 0.5 mu gL(-1), was in the range from 84% to 117%. All other parameters validated previously were recognized as valid for the extended scope procedure. 35 bottled water samples were analyzed for the presence of: As-III, As-V, Cr-VI, Sb-III and Sb-V. In most cases, samples stored in glass containers contained a higher concentration of As-III and As-V in comparison to PET bottles. Antimony exhibits the opposite trend, therefore a higher concentration of Sb-V was determined in the same water stored in PET bottles than in glass bottles. Cr-VI was observed mainly in water stored in green bottles regardless of its material which points to the leaching of chromium from the green containers. The maximum concentrations of As-V, As-III, Sb-V, Cr-VI in the tested samples were (3.759 +/- 0.474) mu gL(-1), (1.121 +/- 0.091) mu gL(-1), (0.721 +/- 0.040) mu gL(-1) and (2.222 +/- 0.084) mu gL(-1) respectively. Sb-III was not detected in any of the samples. (C) 2016 Elsevier B.V. All rights reserved.