Determination of cadmium in rice by electrothermal atomic absorption spectrometry using aluminum as permanent modifier

Silva, Douglas G. da; Junior, Mario M S; Silva, Laiana O.B.; Portugal, Lindomar A.; Matos, Geraldo Domingues; Ferreira, Sérgio L.C.

doi:10.1039/c1ay05442b

Cited by 31 publications

(12 citation statements)

References 31 publications

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“…The cadmium standard solutions used for the external calibration technique were prepared using 2.6 M nitric acid solutions of concentration, considering the acid content of the residual solutions from digestion process that varied of 2.4 to 2.7 M. The accuracy was confirmed by analysis of a certified reference material of rice flour [45].…”

Section: Applications Of Cold Finger System In Sample Preparation Promentioning

confidence: 99%

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A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

Ferreira

Silva

Santana

et al. 2013

Microchemical Journal

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The present paper presents advantages, limitations and applications of a reflux system (cold finger) employed for sample preparation during determination of volatile elements. Also other techniques employed for sample preparation in the determination of volatile elements are discussed and compared. A list of ten papers published reporting use of cold finger as reflux system are being cited and discussed.

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Section: Applications Of Cold Finger System In Sample Preparation Promentioning

confidence: 99%

“…Several authors have used this system in sample digestion process [38][39][40][41][42][43][44][45][46][47].…”

Section: Applications Of Cold Finger System In Sample Preparation Promentioning

confidence: 99%

A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

Ferreira

Silva

Santana

et al. 2013

Microchemical Journal

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“…For populations with high rice Cd and high rice consumption, such as Bangladesh or Japan, Cd contaminated rice is a major health concern(51; 52). ICP-MS(50-52), graphite furnace AAS(53) and also AAS with solid phase extraction(54) have all been used as sensitive detectors for Cd analysis.…”

Section: Determination Of Total Trace Element Concentrations In Foodmentioning

confidence: 99%

Recent Advances in the Measurement of Arsenic, Cadmium, and Mercury in Rice and Other Foods

Jackson

Punshon

2015

Curr Envir Health Rpt

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Trace element analysis of foods is of increasing importance because of raised consumer awareness and the need to evaluate and establish regulatory guidelines for toxic trace metals and metalloids. This paper reviews recent advances in the analysis of trace elements in food, including challenges, state-of-the art methods, and use of spatially resolved techniques for localizing the distribution of As and Hg within rice grains. Total elemental analysis of foods is relatively well-established but the push for ever lower detection limits requires that methods be robust from potential matrix interferences which can be particularly severe for food. Inductively coupled plasma mass spectrometry (ICP-MS) is the method of choice, allowing for multi-element and highly sensitive analyses. For arsenic, speciation analysis is necessary because the inorganic forms are more likely to be subject to regulatory limits. Chromatographic techniques coupled to ICP-MS are most often used for arsenic speciation and a range of methods now exist for a variety of different arsenic species in different food matrices. Speciation and spatial analysis of foods, especially rice, can also be achieved with synchrotron techniques. Sensitive analytical techniques and methodological advances provide robust methods for the assessment of several metals in animal and plant-based foods, in particular for arsenic, cadmium and mercury in rice and arsenic speciation in foodstuffs.

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“…Determination of trace levels of Ag(I) and Cd(II) in water, foods, and vegetables is possible using several analytical techniques such as potentiometric sensors in complex mixtures (Shirmardi-Dezaki et al 2012); FAAS in various food samples (Mashhadizadeh et al 2014); inductively coupled plasma optical emission spectroscopy (ICP-OES) in mushrooms (Chudzyński et al 2013); reversed-phase high-performance liquid chromatography (RP-HPLC) with UV-vis detection in water (Hu et al 2003); GFAAS in biological, water, and soil samples (Yang et al 2009); ETAAS in environmental and rice samples (Rahman et al 2004;Silva et al 2011); and inductively coupled plasma mass spectrometry (ICP-MS) in foods (Nardi et al 2009). ETAAS (or GFAAS), ICP-MS, and ICP-AES are the most sensitive techniques for the determination of trace level of metals, but these techniques, especially ETAAS (or GFAAS), are expensive (when considered cost per analysis of both few elements and many elements in high volume), have poor short-term precision (0.5-5 % for 5-10 min) and long-term precision (1.0-10 % for 1-2 h), are time-consuming due to long furnace program, and need expert's user in his/her area.…”

Section: Introductionmentioning

confidence: 99%

Combination of Ultrasonic-Assisted Cloud Point Extraction with Flame AAS for Preconcentration and Determination of Trace Amounts of Silver and Cadmium in Dried Nut and Vegetable Samples

2016

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In this article, ultrasonic-assisted cloud point extraction (UA-CPE) was used to the preconcentration of trace Ag(I) and Cd(II) in dried nut and vegetable samples. After ion association of Ag(I) and Cd(II) ions with 3,7-diamino-2,8-dimethyl-5-phenyl-phenaziniumchlorid (Safranin T) in the presence of excess potassium iodide (KI) at pH 6.0, the ternary complexes formed were quantitatively extracted into a micellar phase of poly(ethyleneglycol-mono-p-nonylphenylether) (PONPE 7.5) and then determined by flame atomic absorption spectrometry (FAAS). The matrix effects of possible some interfering ions on the method recovery and tolerance limits were also investigated. Under the optimized reagent conditions, the method was linearly dependent on the analyte concentrations in the range of 0.08-90 and 3-250 μg L −1 with limits of detection of 0.02 and 0.9 μg L −1 for Ag(I) and Cd(II), respectively. The reproducibility as the percent relative standard deviations (RSDs %) (0.5, 5.0, and 25 μg L −1 for Ag(I) and 15, 30, and 100 μg L −1 for Cd(II), n = 6) was lower than 3.6 % for both analytes. The accuracy of the method was controlled by analysis of two certified samples (SRM 1573a Tomato leaves and SRM 1643e Trace elements in waters) as well as recovery studies from spiked samples. It has been observed that the results obtained are in a good agreement with the certified values at confidence interval of 95 %. The method was successfully applied to determination of Ag(I) and Cd(II) in several dried nut and vegetable samples by FAAS after separation/preconcentration with UA-CPE.

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Determination of cadmium in rice by electrothermal atomic absorption spectrometry using aluminum as permanent modifier

Cited by 31 publications

References 31 publications

A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

A review of reflux systems using cold finger for sample preparation in the determination of volatile elements

Recent Advances in the Measurement of Arsenic, Cadmium, and Mercury in Rice and Other Foods

Combination of Ultrasonic-Assisted Cloud Point Extraction with Flame AAS for Preconcentration and Determination of Trace Amounts of Silver and Cadmium in Dried Nut and Vegetable Samples

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