Evaluation of arsenic and selenium in Brazilian soluble coffee by inductively coupled plasma atomic emission spectrometry with hydride generation

Santos, Éder José dos; Oliveira, Elisabeth de

doi:10.1590/s1516-89132001000300003

Cited by 9 publications

(2 citation statements)

References 13 publications

(15 reference statements)

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“…Various reagents for the elimination of chemical interferences, including EDTA, thiourea, KCN and KI, were evaluated. dos Santos and de Oliveira 140 determined As and Se in Brazilian soluble coffee by the same technique. Samples were digested with nitric acid and hydrogen peroxide in a focused microwave system, followed by slow heating to eliminate nitric acid, reduction of Se VI to Se IV with 6 mol l 21 HCl and heating at 90 uC under a reflux system.…”

Section: Germaniummentioning

confidence: 99%

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Evans

Day

Price

et al. 2003

J. Anal. At. Spectrom.

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Section: Germaniummentioning

confidence: 99%

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Evans

Day

Price

et al. 2003

J. Anal. At. Spectrom.

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“…There are many analytical techniques with their self-advantages and disadvantages, such as capillary electrophoresis online coupled with hydride generation-atomic fluorescence spectrometry (CE/HG AFS) 2 , inductively coupled plasma mass spectrometry (ICP MS) after a separation and preconcentration procedure 4,7 , spectrophotometry with and without preconcentration 8,9 , graphite furnace atomic absorption spectrometric (GF AAS) after preconcentration with coprecipitation 10 , electrothermal atomic absorption spectrometry (ET AAS) 11 , inductively coupled plasma optical emission spectrometry with hydride generation (HG ICP OES) 12 , atomic absorption spectrometry with hydride generation (HG AAS) 13 , and high performance liquid chromatography with UV detection (HPLC) [14][15][16][17] in literature for speciation analysis of inorganic selenium species.…”

Section: Introductionmentioning

confidence: 99%

Determination of trace amounts of selenium in natural spring waters and tea samples by catalytic kinetic spectrophotometry

Gürkan

2019

Eclet. Quim. J.

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In this work, a new kinetic method is described for the determination of trace Se(IV) in natural spring waters and commercial tea samples. The method is based on the activation of Se(IV) onto the indicator reaction in acidic medium. The reaction was monitored using a fixed time approach of 20 min at 680 nm. The variables affecting the reaction rate were evaluated and optimized. The method allows the determination of Se(IV) in the range of 0.0125-1.0 mg L-1 with a detection limit of 3.6 µg L-1. The precision was in range of 0.63-3.15% (as RSD %) with a higher recovery than 98.6%. The method has been found to be selective against matrix effect. The method was applied to the speciation analysis of inorganic Se species present in the selected samples. The method was statistically validated by analysis of two certified samples and comparing the obtained results to those of HG-AAS analysis. Also, the total Se levels of the samples were determined by using both methods after conversion of Se(VI) into Se(IV) in ultrasonic bath in acidic medium for 30 min at 85-90 °C. The results were in good agreement with those of HG-AAS. The Se(VI) level of the samples was calculated from the difference between amounts of total Se and Se(IV).

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Other foods of plant origin

Vázquez

Vélez

2015

Handbook of Mineral Elements in Food

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Evaluation of arsenic and selenium in Brazilian soluble coffee by inductively coupled plasma atomic emission spectrometry with hydride generation

Cited by 9 publications

References 13 publications

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Atomic spectrometry update. Advances in atomic emission, absorption and fluorescence spectrometry and related techniques

Determination of trace amounts of selenium in natural spring waters and tea samples by catalytic kinetic spectrophotometry

Other foods of plant origin

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