Atomic absorption spectrometric determination of mercury in soil standard reference material following microwave sample pretreatment

Bulska, Ewa; Kandler, Wolfgang; Pasławski, Piotr; Hulanicki, Adam

doi:10.1007/bf01244862

Cited by 35 publications

(11 citation statements)

References 6 publications

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“…Hg vapors were stripped with argon and transferred to the absorption cell. The CV-AAS has been developed to measure low concentrations, and FIAS provides excellent selectivity and sensitivity (Bulska et al, 1995;Lalor et al, 2005) with a detection limit of 0.10 µg kg −1 . The accuracy of the method was verified through an analysis of a calcareous loam soil CRM 141 R standard reference material (Quevauviller et al, 1996).…”

Section: Methodsmentioning

confidence: 99%

Factors Controlling the Spatial Variability of Mercury Distribution in Spanish Topsoil

Martín¹,

Cueva²,

Corbí³

et al. 2008

Soil and Sediment Contamination: An International Journal

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This study characterized the sources and scales of mercury variability in agricultural soils of the river Ebro (9.5 million ha) using geostatistical methods and data from 624 samples. The Ebro basin (20% of Spanish land mass) is an important agricultural area that is industrialized. Spatial analysis was done on a local scale (20 km) and indicated that high Hg concentrations were related to mining and specific agronomic practices, such as sewage effluents from irrigation. The intermediate scale (100 km) was associated with mercury from atmospheric deposition (mining, smelting, and industrial activities). The regional scale (220 km) corresponded to mineralogical structure and bedrock influence. The analysis demostrates that while geographical and geochemical processes and anthropogenic influences, such as industrialization and agricultural practices, can influence the content and distribution of mercury in the valley, the calcareous nature of the soils (alkaline pH and low organic matter) minimize the effect of the mercury load.

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Section: Methodsmentioning

confidence: 99%

Factors Controlling the Spatial Variability of Mercury Distribution in Spanish Topsoil

Martín¹,

Cueva²,

Corbí³

et al. 2008

Soil and Sediment Contamination: An International Journal

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“…This technique has been confirmed as a method of choice over conventional procedures for digestion of mineral and biological samples for total Hg determination [1,2,3], due to a shorter extraction time, a higher extraction efficiency and easier control of digestion parameters. Both closed and open microwave systems are used for the digestion of samples for the total Hg analyses.…”

Section: Introductionmentioning

confidence: 96%

Microwave-assisted determination of total mercury and methylmercury in sediment and porewater

Niessen

Fischer

1999

Analusis

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Microwave-assisted extraction methods for sample preparation have been evaluated in various environmental applications, as are total digestion for element analysis or extraction of selected organic compounds. This technique has been confirmed as a method of choice over conventional procedures for digestion of mineral and biological samples for total Hg determination [1,2,3], due to a shorter extraction time, a higher extraction efficiency and easier control of digestion parameters. Both closed and open microwave systems are used for the digestion of samples for the total Hg analyses. However, determination of the total Hg in environmental samples is not sufficient, as Hg is partly in the form of methylmercury (MeHg), which is considerably more toxic than the inorganic Hg. A particularly difficult task is the determination of MeHg in sediment, where it makes a very low percentage of the total Hg (< 2 %). Only recently, an open low-power focused microwave system has been verified as an appropriate tool for preparation of solid samples for organometallic speciation analysis [4]. It has been used for developing of the isolation procedure of MeHg in sediment based on the microwave-assisted leaching of MeHg with dilute acids [5].In this work, the application of open microwave system for the total Hg and MeHg determination in sediment and porewater is described. Microwave-assisted leaching of the total Hg and MeHg from sediment with an acid extractant, provided a rapid way of separation of these species from the matrix prior to detection by CV AFS (cold vapour atomic fluorescence spectroscopy). Microwave-assisted BrCl oxidation was proved to be more effective for the decomposition of MeHg and stable organomercury complexes in solution (distillate or porewater), as compared with BrCl oxidation at room temperature. Material and methods ReagentsAcids used were of analytical quality (HNO 3 , HCl) or suprapur grade (HCl, Merck). Hg standard was prepared from stock standard solution (1 g/L, Merck). A standard solution was prepared weekly in 10 % HNO 3 and 0.01 % of K 2 Cr 2 O 7, whereas reference standard solutions were prepared daily in 1 % HNO 3 . A reductant solution (5 % SnCl 2 in 10 % HCl) was prepared by dissolving SnCl 2 in concentrated HCl and diluting with water. The certified reference sediments used for verification were PACS-1 (National Research Council of Canada -NRCC) and CRM 580 (Community Bureau of Reference of the European Communities -BCR). 871Microwave-assisted determination of total mercury and methylmercury in sediment and porewater

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“…Such methods are based on a wide range of techniques, like inductively coupled plasma mass spectrometry (ICP-MS) [15,16], capillary column gas chromatography (CC-GC) [17], neutron activation analysis [18], nuclear magnetic resonance (NMR) [19], electrothermal atomization atomic absorption spectrometry (ETA-AAS) [10,20,21], cold vapor atomic absorption spectrometry (CV-AAS) [10, 11, 13, 22 -33], cold vapor atomic fluorescence spectrometry (CV-AFS) [34] and, not recently, also potentiometric stripping analysis [35 -37].…”

Section: Introductionmentioning

confidence: 99%

Peak Area: the Instrumental Datum to Improve the Determination at Ultratrace Level Concentration of Mercury(II) at Gold Electrode

Locatelli

2008

Electroanalysis

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Peak area as instrumental datum for determining the concentration of metals in solution instead of peak height is proposed for analytical voltammetric determinations. In the case of species present at ultra-trace concentration level or having low reversibility degree electrodic processes, the employment of peak area permits to achieve limits of detection lower even more of one order of magnitude. The present work shows the possibility of determining, at ultratrace level concentration, mercury(II) by differential pulse anodic stripping voltammetry (DPASV). The analytical procedure was verified by the analysis of standard reference materials Estuarine Sediment BCR-CRM 277, River Sediment BCR-CRM 320 and Mercury in Water NIST-SRM 1641d and applied to sediments and seawaters sampled in a lagoon ecosystem connected with Adriatic Sea (Ravenna area, Italy). The accuracy, expressed as relative error e (%), and the precision as repeatability, expressed as relative standard deviation s r (%), were satisfactory being lower than 6%. To better validate the analytical procedure, a comparison with spectroscopic measurements is also reported.

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Atomic absorption spectrometric determination of mercury in soil standard reference material following microwave sample pretreatment

Cited by 35 publications

References 6 publications

Factors Controlling the Spatial Variability of Mercury Distribution in Spanish Topsoil

Factors Controlling the Spatial Variability of Mercury Distribution in Spanish Topsoil

Microwave-assisted determination of total mercury and methylmercury in sediment and porewater

Peak Area: the Instrumental Datum to Improve the Determination at Ultratrace Level Concentration of Mercury(II) at Gold Electrode

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