Overview
Ungureanu et al. measured 12 potentially toxic elements in 50 bottled drinking-water samples sold on the Romanian market. The sample set included still, spring, sparkling, table, semi-sparkling, and artesian waters in PET bottles, mostly produced in Romania with additional European and Fiji-origin products. Most measured elements were below applicable drinking-water limits, but one sample exceeded the lead (Pb) limit and several samples had elevated Fe.
Key numbers
- Sample frame: 50 bottled drinking-water samples purchased from 2019 to 2021; 45 were still mineral water and 5 were carbonated mineral water. The set included 36 Romanian brands, 13 brands from other European countries, and 1 Fiji-origin sample.
- Analytical scope: Ba, Co, Cu, Zn, Mn, nickel (Ni), Li, Fe, Pb, cadmium (Cd), chromium (Cr), and Sb, reported in micrograms per liter.
- Pb: minimum below 0.07 micrograms/L, maximum 6.0 +/- 0.25 micrograms/L, mean 0.59 +/- 150.33 micrograms/L as printed in Table 1. The authors state that Pb was detected in 96% of samples and that one sample exceeded the 5 micrograms/L limit.
- Cd: minimum and maximum both below 0.09 micrograms/L; the authors report Cd detection in 0% of samples.
- Cr: minimum below 0.10 micrograms/L and maximum 4.02 +/- 2.12 micrograms/L.
- Sb: minimum below 0.07 micrograms/L and maximum 0.64 +/- 6.85 micrograms/L.
- Fe: minimum 13.73 +/- 7.49 micrograms/L and maximum 1761.24 +/- 1.23 micrograms/L; the authors state that Fe exceeded the 200 micrograms/L limit in 94% of samples.
- Detection limits were 0.07 micrograms/L for Sb and Pb; 0.09 micrograms/L for Ba, Cu, Mn, Ni, and Cd; 0.10 micrograms/L for Co and Cr; 0.11 micrograms/L for Li; 0.13 micrograms/L for Zn; and 0.15 micrograms/L for Fe.
Methods (brief)
The study evaporated 300 mL water aliquots to dryness, treated the residue twice with 1:1 nitric acid, and brought the final solution to 50 mL. Validation used SPS-SW2 surface-water certified reference material. The paper reports recoveries between 90% and 105%, relative standard deviation at or below 4%, and calibration curves from 0 to 50 micrograms/L with correlation coefficients above 0.996. The paper does not report arsenic or mercury measurements in this dataset.
Related evidence
- Bottled drinking water (purified, spring, artesian)
- Mineral water
- Sparkling/carbonated water (unflavored)
- Water
- Lead
- Cadmium
- Chromium
- Nickel
Update history
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