Microwave-assisted diluted acid digestion for trace elements analysis of edible soybean products

Barbosa, Johildo Salomão Figueirêdo; Santos, Carlos Honorato Schuch; Peralva, Vanessa N.; Flores, Érico M.M.; Korn, Mauro; Nóbrega, Joaquim A.; Korn, Maria Graças A.

doi:10.1016/j.foodchem.2014.11.092

Cited by 87 publications

(20 citation statements)

References 35 publications

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“…The essential TEs content in soybean seeds obtained are in accordance with those reported by several authors in the literature [11,[19][20][21]. The concentration of the essential elements in the analyzed samples Other authors have found statistically significant differences in the metallic content between transgenic and non-transgenic soybean seeds, being concentrations of Cu and Fe higher in transgenic seeds by 40 and 20% respectively [22][23].…”

Section: Results and Discusion Trace Elements Determinationssupporting

confidence: 89%

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Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

Pistón¹,

Viera²,

Machado³

et al. 2019

Br J Anal Chem

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Soybean (Glycine max) represents one of the most important crops in Uruguay, mostly processed for animal feed, while a smaller percentage is processed for human consumption. Soy foodstuffs are also a source of trace elements (TEs). Cu, Fe, Ni, Zn, As, Cd and Pb were determined in soybean seeds batches and correlations within them and with biochemical parameters (superoxide anion content, superoxide dismutase enzyme and viability of the analyzed seeds) were studied. Analytical determinations of Cu, Fe and Zn were performed by flame atomic absorption atomic spectrometry (FAAS) while As, Cd, Ni and Pb were determined by electrothermal atomic absorption spectrometry (ETAAS). For sample preparation, a-1 microwave assisted digestion was carried out using diluted acid (3.5 mol L HNO). The concentrations of 3-1-1 the essential elements where in the following ranges: 12-24 mg kg for Cu, 60-125 mg kg for Fe, 5.4-1-1-1 17.9 mg kg for Ni and 33-50 mg kg for Zn. Cd and As content was < 0.2 and 0.3 mg kg respectively,-1 whereas Pb exceeded slightly the admitted limit in five samples (above 0.2 mg kg). Positive correlations were found for Fe:Cd:Pb (p<0.005), Cu:Fe, As:Cd:Pb and Zn:Ni (p<0.05). A novel highly significant positive correlation (p < 0.005) between Cd content and seed quality parameters related to seed germination was found. This suggests that the concentration of Cd do not produce negative effects in the development of the seedlings, despite this Cd and Pb levels must be monitored to guarantee food safety.

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Section: Results and Discusion Trace Elements Determinationssupporting

confidence: 89%

“…The use of diluted acid for microwave assisted digestions was reported as an efficient procedure for total digestion in several complex matrices including soybean seeds [14,19]. In this work, the use of 3.5 -1 mol L HNO was successful.…”

Section: Results and Discusion Trace Elements Determinationsmentioning

confidence: 84%

Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

Pistón¹,

Viera²,

Machado³

et al. 2019

Br J Anal Chem

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“…On the other hand, when using only a dilute acid solution, polymeric waste electrical and electronic equipment (WEEE) samples were digested avoiding the use of stabilizing solution for bromine determination. 107 Finally, it is important to mention that acid digestion methods using concentrated or dilute 150,151 solutions have been mainly used for hard-to-digest matrices, such as petrochemical 52,73,107,118 and biological samples. 25,37,81,82,109 Another relatively simple and inexpensive sample preparation Na 2 CO 3 , Na 2 SO 3 , NaOH, or TMAH), being converted into their ionic form.…”

Section: Sample Preparation Methods For Further Halogen Determinatimentioning

confidence: 99%

Challenges and trends for halogen determination by inductively coupled plasma mass spectrometry: A review

Flores

Mello

Krzyzaniak

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale In this review, works published in the past 25 years for fluorine, chlorine, bromine, and iodine determination in several matrices by inductively coupled plasma mass spectrometry (ICP‐MS) were covered. Usually, the determination of halogens has been performed by ICP‐MS using a previous sample preparation step or, more recently, by direct analysis of solid or liquid samples. Methods Methods based on combustion, extraction, pyrohydrolysis, sample dilution in organic or aqueous medium, and wet digestion, among others, are discussed. Moreover, the recent applications of methods based on laser ablation (LA) and electrothermal vaporization (ETV) coupled to ICP‐MS are discussed. Results The main challenge for methods using sample preparation has been to obtain a final solution compatible with ICP‐MS, as well as to overcome problems related to analyte losses and contamination. Interferences due to the presence of dissolved organic compounds in solution, enhancement or suppression of ionization of analytes, and related matrix effects have been of concern when using ICP‐MS. For the determination of halogens by ICP‐MS using LA and ETV systems, some limitations related to the difficulty of calibration are pointed out, impairing the widespread use of this approach. Conclusions A critical view is presented for further halogen determination by ICP‐MS, mainly for matrices considered difficult to digest using conventional protocols.

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“…Residual carbon in digested samples can be determined by several methods including NMR [ 18 ] and ICP-OES [ 21 , 27 ]. Our approach used an established methodology widely applied to wastes and wastewater.…”

Section: Methodsmentioning

confidence: 99%

Influence of Digestion Procedure and Residual Carbon on Manganese, Copper, and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry

Adamczyk-Szabela

Anielak

Wolf

2017

Journal of Analytical Methods in Chemistry

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Mineralization to the complete oxidation of sample carbon component does not always assure the best analyte recovery. Particular attention should be paid to the presence of silicon in the investigated plant sample and especially in the certified reference material for which Si content is scarcely given by the providers. During mineralization without addition of the hydrofluoric acid, the residual carbon may block silica surfaces and increase availability of an analyte for its spectral determination in the solution. This issue is of particular relevance because standard protocols for digestion of plant matrices often do not support hydrofluoric acid addition. Several procedures recommended for decomposition of herbal plants were applied for the respective certified reference material and examined in detail. Manganese, copper, and zinc contents were analyzed in all samples by the flame atomic absorption spectrometry. Additionally, the residual carbon was determined in all mineralizates. Silicon content was analyzed by the X-ray fluorescence method. The best recoveries were observed for samples characterized by relatively high residual carbon.

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Microwave-assisted diluted acid digestion for trace elements analysis of edible soybean products

Cited by 87 publications

References 35 publications

Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

Determination of As, Cd, Cu, Fe, Ni, Pb and Zn in Soybean Seeds and their Correlation with Relevant Biochemical Parameters to assess Food Quality

Challenges and trends for halogen determination by inductively coupled plasma mass spectrometry: A review

Influence of Digestion Procedure and Residual Carbon on Manganese, Copper, and Zinc Determination in Herbal Matrices by Atomic Absorption Spectrometry

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