The influence of sample drying procedures on mercury concentrations analyzed in soils

Bulletin of Environmental Contamination and Toxicology
Maria HojdováTomáš Navrátil

Abstract

Methods commonly used for soil sample preparation may be unsuitable for measuring Hg concentrations due to the possible loss of volatile Hg species when drying at higher temperatures. Here, the effects of freeze-drying, air drying at 25°C and oven-drying at 105°C on Hg concentrations in two soil types and three standard reference materials were tested. Two soils with different levels of Hg contamination and three reference materials were examined. A systematic decrease of Hg concentrations was observed in air-dried (24 %) and oven-dried (3 %) contaminated upland soils in comparison to freeze-dried control samples. The 105°C oven drying also led to loss of Hg from reference materials (5 %-8 % in comparison with the certified Hg concentration). Different results from the drying of sterilized reference materials and natural soils were probably related to the extent of microbiological activity, demonstrating the importance of this parameter in sample preparation for Hg analysis.

References

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Mar 23, 2007·Bulletin of Environmental Contamination and Toxicology·V EttlerM Mihaljevic

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Citations

Jun 11, 2016·Bulletin of Environmental Contamination and Toxicology·Chao WuYong Qian
Oct 21, 2015·Environmental Science & Technology·Peter S HomannBrett A Morrissette
Feb 13, 2019·The Science of the Total Environment·Christine L OlsonDaniel Obrist
Feb 26, 2019·The Science of the Total Environment·F R D LimaJ J Marques
Oct 9, 2021·Environmental Geochemistry and Health·Justin B Richardson

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