A new and sensitive method for the determination of cadmium and mercury was developed using nebulous phase reaction, cold vapor atomic absorption spectrometry (CVAAS). This design effectively reduces the loss of cadmium and volatile mercury species in aqueous solution and transfer process. The effects of several experimental parameters of the proposed system were optimized. Using the optimized experimental conditions, detection limits of 21 and 8 ng x L(-1) with RSD of 3.2% and 2.9% (n = 11) were obtained for cadmium and mercury, respectively. This method has been successfully applied to the determination of cadmium and mercury in tobacco leaves samples with the recoveries over 92%.
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Associations of a metal mixture and vitamin D with sleep duration among adolescents and young adults from the 2011-2018 NHANES cycles.
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January 2025
Department of Epidemiology and Environmental Health, University at Buffalo, USA. Electronic address:
Introduction: Heavy metal exposure has been associated with poor sleep, but little is known about the cumulative associations of multiple metals with sleep duration, particularly among adolescents. This study examined the association of blood lead (Pb), cadmium (Cd), and mercury (Hg) concentrations with sleep duration and possible effect modification by vitamin D.
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Prenatal metal(loid) exposure and preterm birth: a systematic review of the epidemiologic evidence.
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January 2025
Department of Environmental Sciences & Engineering, Gillings School of Global Public Health, University of North Carolina at Chapel Hill, Chapel Hill, NC, USA.
Background: Preterm birth (PTB) is a common pregnancy complication associated with significant neonatal morbidity. Prenatal exposure to environmental chemicals, including toxic and/or essential metal(loid)s, may contribute to PTB risk.
Objective: We aimed to summarize the epidemiologic evidence of the associations among levels of arsenic (As), cadmium (Cd), chromium (Cr), copper (Cu), mercury (Hg), manganese (Mn), lead (Pb), and zinc (Zn) assessed during the prenatal period and PTB or gestational age at delivery; to assess the quality of the literature and strength of evidence for an effect for each metal; and to provide recommendations for future research.
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Department of Seafood Processing Technology, Faculty of Fisheries, Cukurova University, Adana 01330, Balcali, Türkiye.
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Environ Sci Pollut Res Int
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Department of Zoology, Faculty of Science, Zagazig University, Zagazig, 44519, Egypt.
The residual concentration of pesticides and heavy metals (arsenic, mercury, selenium, lead, cadmium, and aluminum) was measured in the soil and the cattle egret (Bubulcus ibis) liver from two localities at Sharkia Governorate, Egypt. The pesticide residues have taken the following pattern: chlorpyrifos > metalaxyl > piperonyl butoxide > thiophanate-methyl, in the soil. The residual concentration of pesticides was greater in the soil at Kafr El-Ashraf village (agricultural site) than at El-Qanayat city (garbage site) during the summer season of 2021 compared with the winter season of 2022.
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Hubei Key Laboratory of Mineral Resources Processing and Environment, School of Resources and Environmental Engineering, Wuhan University of Technology, Wuhan 430070, China. Electronic address:
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