Evaluation of atomic absorption with a heated graphite atomizer for the direct determination of trace transition metals in sea water

Segar, Douglas A.; González, Jorge

doi:10.1016/s0003-2670(00)86848-8

Cited by 110 publications

(22 citation statements)

References 4 publications

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“…The mercury absorbance signal record for atomization temperature higher than 1700 ~ showed high scatter for all chemical modifiers investigated. This fact has been mentioned in the literature [23], dealing with the determination of metals in sea water samples and it is due to the amount of salts which are covolatilized at certain atomization temperatures.…”

Section: Charring and Atomization Temperaturesmentioning

confidence: 98%

Comparative study of magnesium nitrate, palladium nitrate and reduced palladium for the direct determination of mercury in sea water by electrothermal atomization atomic absorption spectrometry

Bermejo–Barrera

Moreda–Piñeiro

et al. 1996

Mikrochim Acta

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Abstract.A comparative study of different chemical modifiers in graphite furnace atomic absorption spectrometry for the direct determination of mercury in sea water samples, in synthetic sea water sample of high (72.8%0) and low 34.2%0) salinity and in aqueous solutions, was carried out. The use of reduced palladium produces better results. The mixture of palladium nitrate and ascorbic acid, gives the best limit of detection (1.9 btgl-1). The use of reduced palladium and magnesium nitrate produced excellent recoveries (close to 100%) in the whole salinity range for all mercury concentration tested. The use of palladium nitrate alone or combined with magnesium nitrate gave good recoveries with respect to a real sea water sample for low salinities. The interference from the major components of sea water were completely removed by using reduced palladium and magnesium nitrate modifiers. Thus, a single calibration curve with synthetic sea water may be applied to the analysis of sea water samples of widely differing salinities.Key words: electrothermal atomization atomic absorption spectrometry, mercury, sea water, modifiers, palladium nitrate, magnesium nitrate, reduced palladium.Atomic absorption spectrometry with electrothermal atomization (ET-AAS) was not recommended for the determination of mercury owing to the possible losses of mercury during the drying and ashing steps, and the cold vapour is known as the more useful technique for mercury determination. However, the problem related to the loss of mercury in ET-AAS can be minimized with the use of chemical modifiers, which stabilize mercury at higher temperatures.

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Section: Charring and Atomization Temperaturesmentioning

confidence: 98%

Comparative study of magnesium nitrate, palladium nitrate and reduced palladium for the direct determination of mercury in sea water by electrothermal atomization atomic absorption spectrometry

Bermejo–Barrera

Moreda–Piñeiro

et al. 1996

Mikrochim Acta

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“…The presence of large amounts of sodium chloride in seawater and brine samples introduces many difficulties in the direct analysis of trace metals by electrothermal atomization atomic absorption spectrometry (1)(2)(3). In fact, the volatilization of the matrix components produces an intense nonspecific absorption which cannot be compensated completely with a background corrector.…”

Section: Introductionmentioning

confidence: 99%

“…The latter requires the temporary introduction of a 45Њ mirror in the light beam near the right hand window of the atomizer. The direct monitoring of the furnace by means of the 1 To whom correspondence should be addressed. mirror is sometimes hindered from the too intense illumination of the spectral source used.…”

Section: Introductionmentioning

confidence: 99%

Use of Graphite Furnace Television in Electrothermal Atomization Atomic Absorption Spectrometry

Donati

Ottaviani

Veschetti

1996

Microchemical Journal

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“…In recent years, methods have been developed to determine trace elements in seawater by X-ray fluorescence (1), neutron activation (2, 3), spectrophotometry (4), anodic stripping voltammetry (5), and atomic absorption spectrometry (6)(7)(8). However, each of these analytical techniques requires a preliminary separation.…”

mentioning

confidence: 99%

Separation of eight transition elements from alkali and alkaline earth elements in estuarine and seawater with chelating resin and their determination by graphite furnace atomic absorption spectrometry

Kingston¹,

Barnes²,

Brady³

et al. 1978

Anal. Chem.

347

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Evaluation of atomic absorption with a heated graphite atomizer for the direct determination of trace transition metals in sea water

Cited by 110 publications

References 4 publications

Comparative study of magnesium nitrate, palladium nitrate and reduced palladium for the direct determination of mercury in sea water by electrothermal atomization atomic absorption spectrometry

Comparative study of magnesium nitrate, palladium nitrate and reduced palladium for the direct determination of mercury in sea water by electrothermal atomization atomic absorption spectrometry

Use of Graphite Furnace Television in Electrothermal Atomization Atomic Absorption Spectrometry

Separation of eight transition elements from alkali and alkaline earth elements in estuarine and seawater with chelating resin and their determination by graphite furnace atomic absorption spectrometry

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