Stability of mercury concentration measurements in archived soil and peat samples

0491047 - GLÚ 2019 RIV GB eng J - Článek v odborném periodiku
Navrátil, Tomáš - Burns, D. A. - Nováková, Tereza - Kaňa, Jiří - Rohovec, Jan - Roll, Michal - Ettler, V.
Stability of mercury concentration measurements in archived soil and peat samples.
Chemosphere. Roč. 208, October 2018 (2018), s. 707-711. ISSN 0045-6535. E-ISSN 1879-1298
Grant CEP: GA ČR(CZ) GA16-14762S
Institucionální podpora: RVO:67985831 ; RVO:60077344
Klíčová slova: CV-AAS * forest soil * mercury * Re-measurement * soil archive * storage
Obor OECD: Environmental sciences (social aspects to be 5.7)
Impakt faktor: 5.108, rok: 2018

Archived soil samples can provide important information on the history of environmental contamination and by comparison with recently collected samples, temporal trends can be inferred. Little previous work has addressed whether mercury (Hg) concentrations in soil samples are stable with long-term storage under standard laboratory conditions. In this study, we have re-analyzed using cold vapor atomic absorption spectroscopy a set of archived soil samples that ranged from relatively pristine mountainous sites to a polluted site near a non-ferrous metal smelter with a wide range of Hg concentrations (6.7–6485 μg kg⁻¹). Samples included organic and mineral soils and peats with a carbon content that ranged from 0.2 to 47.7%. Soil samples were stored in polyethylene bags or bottles and held in laboratory rooms where temperature was not kept to a constant value. Mercury concentrations in four subsets of samples were originally measured in 2000, 2005, 2006 and 2007, and re-analyzed in 2017, i.e. after 17, 12, 11 and 10 years of storage. Statistical analyses of either separated or lumped data yielded no significant differences between the original and current Hg concentrations. Based on these analyses, we show that archived soil and peat samples can be used to evaluate historical soil mercury contamination.
Trvalý link: http://hdl.handle.net/11104/0285130