Slurry Sampling for the Determination of Mercury in Rice Using Cold Vapor Atomic Absorption Spectrometry

Silva, Laiana Oliveira Bastos; Silva, Douglas Gonçalves da; Leão, Danilo Junqueira; Matos, Geraldo Domingues; Ferreira, Sérgio Luís Costa

doi:10.1007/s12161-012-9371-0

Cited by 21 publications

(15 citation statements)

References 47 publications

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“…The results obtained can be seen in Table 5. The results found agreed with those obtained by other authors (Da Silva et al, 2010;Qian et al, 2010;Silva et al, 2012).…”

Section: Application -Determination Of Mercury In Rice Samplessupporting

confidence: 93%

“…The values achieved for a digested rice mass of 0.50 g were 0.48 and 1.61 ng g À1 , respectively. The value obtained for the limit of detection is lower than others found as 0.90 ng g À1 (Da Silva et al, 2010) and 0.95 ng g À1 (Silva et al, 2012). The precision expressed as relative standard deviation was evaluated for two rice samples with mercury content of 3.63 and 5.81 ng g À1 .…”

Section: Validation Of the Methods Proposedmentioning

confidence: 76%

“…A direct method for the determination of mercury in rice was proposed using slurry sampling and cold vapour atomic absorption spectrometry (CV AAS). Brazilian samples were analysed and the mercury content varied from 4.10 to 13.72 ng g À1 (Silva, da Silva, Leao, Matos, & Ferreira 2012).…”

Section: Introductionmentioning

confidence: 99%

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Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry

et al. 2013

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In the present paper the use of a MSFIA system for determination of mercury in rice by cold vapour atomic fluorescence spectrometry (CV AFS) is proposed. The sample digestion is performed in a microwave oven using nitric acid and hydrogen peroxide. The experimental conditions for vapour generation were determined using a full two-level factorial design involving the following factors: nitric acid and tin chloride concentrations and sample flow rate. Employing the conditions optimised, the method allows the determination of mercury using the external calibration technique with aqueous standards. The reached limits of detection and quantification were 0.48 and 1.61 ng g⁻¹ respectively, and the precision (as relative standard deviation) was 3.28% and 1.56% for rice samples with a mercury content of 3.63 and 5.81 ng g⁻¹, respectively. The method accuracy was confirmed analysing a certified reference material of rice flour furnished by National Institute of Standard and Technology. The interference of nitrous acid and nitrous oxides are removed using potassium dichromate. The method was applied to mercury determination in twelve rice samples acquired in Palma de Mallorca (Spain) between the months of January and April of 2012. The mercury content found varied from 2.15 to 7.25 ng g⁻¹. These results agree with those reported by others authors.

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“…The results obtained can be seen in Table 5. The results found agreed with those obtained by other authors (Da Silva et al, 2010;Qian et al, 2010;Silva et al, 2012).…”

Section: Application -Determination Of Mercury In Rice Samplessupporting

confidence: 93%

Section: Validation Of the Methods Proposedmentioning

confidence: 76%

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Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry

et al. 2013

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“…The majority of recent studies on methylation in rice paddies have examined contaminated systems (Rothenberg et al 2014), which are beyond the scope of this paper. However, methylation has been found to occur in non-contaminated rice cultivation sites around the world including Brazil (da Silva et al 2010;Batista et al 2012;Silva et al 2012), China (Rothenberg et al 2011), and Spain (da Silva et al 2013). The use of stable isotope tracers recently confirmed that MeHg produced in saturated soils is subsequently observed in the plant's rice grains (Strickman and Mitchell 2017), suggesting that the prevalence of methylation in rice paddies is a significant concern due to its potential to cause mercury poisoning directly through a common staple food source.…”

Section: Inundated Environmentsmentioning

confidence: 99%

Recent advances in the study of mercury methylation in aquatic systems

Paranjape

Hall

2017

FACETS

121

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With increasing input of neurotoxic mercury to environments as a result of anthropogenic activity, it has become imperative to examine how mercury may enter biotic systems through its methylation to bioavailable forms in aquatic environments. Recent development of stable isotope-based methods in methylation studies has enabled a better understanding of the factors controlling methylation in aquatic systems. In addition, the identification and tracking of the hgcAB gene cluster, which is necessary for methylation, has broadened the range of known methylators and methylation-conducive environments. Study of abiotic factors in methylation with new molecular methods (the use of stable isotopes and genomic methods) has helped elucidate the confounding influences of many environmental factors, as these methods enable the examination of their direct effects instead of merely correlative observations. Such developments will be helpful in the finer characterization of mercury biogeochemical cycles, which will enable better predictions of the potential effects of climate change on mercury methylation in aquatic systems and, by extension, the threat this may pose to biota.

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“…It is concerned because mercury can be methylated by bacteria to produce methylmercury. So, many methods have been published for determination of methylmercury in rice [6,7,8,9]. The World Health Organization (WHO) recommends a maximum intake of methylmercury of 1.6 μg kg −1 per week [10].…”

Section: Human Exposure To Mercury and Its Compoundsmentioning

confidence: 99%

Analytical strategies of sample preparation for the determination of mercury in food matrices — A review

Ferreira

Lemos

Silva

et al. 2015

Microchemical Journal

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Slurry Sampling for the Determination of Mercury in Rice Using Cold Vapor Atomic Absorption Spectrometry

Cited by 21 publications

References 47 publications

Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry

Determination of mercury in rice by MSFIA and cold vapour atomic fluorescence spectrometry

Recent advances in the study of mercury methylation in aquatic systems

Analytical strategies of sample preparation for the determination of mercury in food matrices — A review

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