2012
DOI: 10.1021/ef3010042
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Direct Determination of Inorganic Mercury in Ethanol Fuel by Cold Vapor Atomic Absorption Spectrometry

Abstract: A simple method for the direct determination of mercury in ethanol fuel samples diluted with water by cold vapor atomic absorption spectrometry (CV-AAS) is proposed. The chemical parameters (concentrations of NaBH 4 and HCl) used for the Hg vapor generation for its measurement by CV-AAS were optimized. The calibration curve showed a linear response over the studied range (1−25 μg L −1 ), with a correlation coefficient of 0.9999 and limits of detection and quantification of 0.05 and 0.17 μg L −1 , respectively.… Show more

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Cited by 18 publications
(12 citation statements)
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“…Therefore, there is a great need for simple, reliable on-site analyses for Hg 2+ in surface water and could potentially prevent mercury-related illness through the early detection of environmental contamination. A series of spectroscopic methods have been used to measure trace concentrations of Hg 2+ in environmental samples, such as atomic absorption spectroscopy (AAS) [10,11], inductively coupled plasma mass spectrometry (ICP-MS) [12,13], and atomic fluorescence spectrometry (AFS) [14]. While these assays are highly sensitive, selective, and accurate, they require complex sample preparation procedures, expensive and bulky instruments, and professionally trained personnel to run the tests.…”
Section: Introductionmentioning
confidence: 99%
“…Therefore, there is a great need for simple, reliable on-site analyses for Hg 2+ in surface water and could potentially prevent mercury-related illness through the early detection of environmental contamination. A series of spectroscopic methods have been used to measure trace concentrations of Hg 2+ in environmental samples, such as atomic absorption spectroscopy (AAS) [10,11], inductively coupled plasma mass spectrometry (ICP-MS) [12,13], and atomic fluorescence spectrometry (AFS) [14]. While these assays are highly sensitive, selective, and accurate, they require complex sample preparation procedures, expensive and bulky instruments, and professionally trained personnel to run the tests.…”
Section: Introductionmentioning
confidence: 99%
“…É também considerado um elemento altamente tóxico, mesmo em baixas concentrações, devido ao seu poder acumulativo no meio ambiente e sua toxicidade depende da forma química em que ele se encontra: C 2 H 5 Hg + CH 3 Hg + Hg 0 Hg 2+ . 8 Diversas técnicas para a determinação de Hg podem ser empregadas, tais como a espectrometria de fluorescência atômica com geração de vapor frio (CV AFS), a espectrometria de emissão óptica com plasma indutivamente acoplado (ICP OES); a espectrometria de massas com plasma indutivamente acoplado (ICP-MS) e a espectrometria de absorção atômica com vapor frio (CV AAS), sendo esta última a mais popular. 9 Na CV AAS, as espécies de Hg são normalmente mineralizadas a Hg 2+ por meio de um ataque ácido e, em seguida, reduzidas para a sua forma elementar (Hg 0 ) por meio de reação com agentes redutores como o SnCl 2 ou o NaBH 4 .…”
Section: Introductionunclassified
“…9 Na CV AAS, as espécies de Hg são normalmente mineralizadas a Hg 2+ por meio de um ataque ácido e, em seguida, reduzidas para a sua forma elementar (Hg 0 ) por meio de reação com agentes redutores como o SnCl 2 ou o NaBH 4 . 8 A fim de reduzir ou eliminar a utilização de agentes redutores e contribuir com a química verde, a geração fotoquímica de vapor acoplada à espectrometria de absorção atômica com vapor frio (PVG-CV AAS) é uma técnica emergente que vem sendo utilizada com êxito na determinação de Hg e outros elementos em diferentes tipos de amostras, como material bológico 10,11 , álcool combustível 11,12 , glicerina oriunda do processo de biodiesel 13 , nafta e petróleo 14 , entre outras .…”
Section: Introductionunclassified
“…However, most of them require expensive instruments and are time-consuming [16][17][18][19] . Compared to these methods, fluorescent chemical sensors have attracted enormous attention due to their faster-response and lower-cost properties [20][21][22][23] .…”
Section: Introductionmentioning
confidence: 99%