Determination of arsenic and antimony in wine by electrothermal atomic absorption spectrometry

Abstract

The determination of As and Sb in red and white wines by graphite furnace Zeeman atomic absorption spectrometry is described. The wine can be analyzed directly, provided a matrix modifier is used. Three modifiers have been tested; palladium nitrate was found to be superior to nickel nitrate and nickel sulphate. The sensitivity and detection limits were improved when the wine was decomposed with a mixture of nitric acid and hydrogen peroxide prior to analysis. Two different decomposition systems (Tecator and Bethge) were employed without loss of analyte. The concentration of As and Sb was found to be below 10 g/L for all the wine samples. The standard addition method was used for the quantitative determination.

Atomic spectrometry methods for wine analysis: A critical evaluation and discussion of recent applications

“…ETAAS has some attractive features since the wine matrix can be partly removed during the pyrolysis step with the aid of chemical modifiers. Among the elements of interest determined by ETAAS are Pb [39,40,42,43,53,64], Cd [39,40,43,64], As [43,65] Sb [65], Al [13], Cu [43], Cr [39], V [15] and Hg [41]. HGAAS/HGAFS techniques are employed for elements such as Pb [50,51,53,66], As [52,66,67], Bi [66], Sn [66], Se [49] and Te [66].…”

“…Thus, Kildahl and Lund [65] found that the use of a matrix modifier is mandatory for the determination of As and Sb in wine samples by ETAAS. Dessuy et al [42] tested some modifiers for the determination of Pb.…”

“…At this point, it must be taken into account that non-volatile organic compounds present in wine samples would act as modifier. Kildahl and Lund [65] highlighted the relevance of such compounds in the determination of Cr, Pb and Cd in samples obtained at different stages of the winemaking process.…”

“…Several authors have reported on elemental analysis of wine where aqueous or matrix matched standards could not provide unbiased results and alternative methodologies such as standard additions were required to compensate for matrix effects [30,41,65]. Thus, for instance, Kildahl and Lund [65] were forced to use standard addition due to the differences in the As and Sb sensitivity between standards and untreated and decomposed wine samples in ETAAS.…”

Speciation analysis of inorganic form of arsenic in ground water samples by hydride generation atomic absorption spectrometry with insitu trapping in graphite tube

“…The modifiers can be the compounds of palladium [1,[7][8][9][10][11], nickel [11,12], magnesium [11] and such metals as rhodium [13], zirconium [5], iridium [1,9,14], which can also be applied as permanent modifiers [15]. Apart from the solutions of the modifier salt, often a surfactant is also applied.…”