Manganese and Zinc Analysis in Milk by Microwave Oven Digestion and Platform Graphite Furnace Atomic Absorption Spectrometry

Fuente, Miguel Ángel de la; Guevara, Gonzalo; Juárez, Manuela

doi:10.1021/jf00057a017

Cited by 23 publications

(9 citation statements)

References 9 publications

(19 reference statements)

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“…Nitric acid was selected as extractant because it is the most frequently used acid for mineralization by a microwave oven [20]. This acid behaves ideally under microwave energy irradiation, has a relatively low boiling point, can be obtained in high purity, and lacks of the hazards and inconveniences of other acids such as perchloric acid.…”

Section: Resultsmentioning

confidence: 99%

“…These methods involve some shortcomings, such as long manipulation time [12,16,17] large consumption of chemicals, losses of elements by volatilization and fume emissions. The use of a domestic microwave oven with containers of either stainless steel or PTFE (polytetrafluoroethylene) equipped with a sealing pressure-resistant system [18,19] provides short lixiviation times and reduces emission of gases, but involves serious safety problems [15,20]. With a view of overcoming these shortcomings, procedures based on either focused microwave-assisted digestion or ultrasound-assisted leaching have been proposed [21].…”

Section: Introductionmentioning

confidence: 99%

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New methods for acceleration of meat sample preparation prior to determination of the metal content by atomic absorption spectrometry

2003

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Focused microwave-assisted digestion and ultrasound leaching have been applied for the extraction of Pb, Cd, Cr, Cu, Fe, Zn, Ca, and Mg from raw meat. Semimembranous muscle (SM) of raw pig ham was used for optimizing both the digestion and extraction steps by multivariate approaches. The detection and quantification limits were 0.5 and 0.9 microg kg(-1) for Pb, 0.06 and 0.1 microg kg(-1) for Cd, 0.2 and 1.2 microg kg(-1) for Cr, 0.4 and 3 microg kg(-1) for Cu, 0.04 and 0.1 mg kg(-1) for Fe, 0.012 and 0.017 mg kg(-1) for Zn, 0.3 and 0.4 mg kg(-1) for Ca, and 0.01 and 0.03 mg kg(-1) for Mg. The precision, expressed as relative standard deviation (RSD), ranged between 2.5 and 9.6% for focused microwave-assisted digestion and between 3.5 and 10.6% for ultrasound leaching. The methods were then compared with a reference method and applied to a certified reference material (bovine muscle 184, from the BCR). The t-test, applied to the results obtained from focused microwave-assisted digestion, revealed that they are in agreement (p>0.01) with the certified and estimated values in the case of Pb, Cd, Cr, Cu, Fe, Ca, Mg, and Zn but not in that of Fe. In the case of ultrasound leaching, only the extraction of Pb, Cu, and Ca was quantitative. The method based on microwave digestion provides more accurate and precise results than ultrasound leaching. These new procedures have many advantages with regards to conventional methods, namely, reduction of the extraction time, simplification of the process, avoidance of chemical emissions to the atmosphere, and no losses of metals by volatilization.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

New methods for acceleration of meat sample preparation prior to determination of the metal content by atomic absorption spectrometry

2003

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“…The samples were subjected to digestion at a power of 1000 W and variable temperatures and subsequently cooled at 0 W. The temperature used for microwave digestion increased gradually from 80 ∘ C (5 min) to 120 ∘ C (5 min) to 150 ∘ C (5 min), and to 180 ∘ C (20 min), followed by cooling to 40 ∘ C. After cooling, the contents were diluted to 50.0 mL with deionized water, and subjected to elemental analysis in triplicate. [16][17][18][19] Analysis of macro, trace, and toxic trace elements Macro elements, including Al, Ca, K, Mg, Na, P, and S were analyzed using ICP-OES. Trace elements (Ba, Be, Co, Cr, Cu, Fe, Ga, Li, Mn, Ni, Rb, Se, Sr, V, and Zn) and toxic trace elements (As, Cd, In, Pb, and Tl) were assessed using ICP-MS. Instruments drift was corrected by running a multi-element standard solution at an interval of once per every 10 analyses.…”

Section: Sample Collection Preparation and Digestionmentioning

confidence: 99%

“…The elements that it contained were analyzed by using accurate methods of inductively coupled plasma-optical emission spectroscopy (ICP-OES) for macro elements and ICP-mass spectrometry (ICP-MS) for trace and toxic elements, which have low limits of detection and quantification, and are thus widely used for the elemental analysis of food products. [16][17][18] As the elemental analysis of food products also depends greatly on the sample digestion procedure, 19 this study applied the rapid and accurate microwave digestion method, which has been reported in the literature as yielding satisfactory results in elemental analyses. [16][17][18] This study conducted a health intake assessment based on the survey on Korean consumption of kimchi in 2016.…”

Section: Introductionmentioning

confidence: 99%

Dietary intake assessment of macro, trace, and toxic elements via consumption of kimchi in South Korea

Hwang¹,

Yang²,

Jung³

et al. 2019

J Sci Food Agric

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BACKGROUND Kimchi, a Korean food, is now produced and consumed in many other countries. In this study, the macro, trace, and toxic element content in varieties of kimchi from Korea and China was evaluated. A health‐risk assessment, involving the calculation of estimated dietary intake values, was undertaken. To discriminate among samples with different origins, linear discriminant analysis (LDA) and principal component analysis (PCA) were applied. RESULTS The analytical methods used for analyses were successfully validated. In the quantification of elements, no significant differences were detected in the concentrations of the elements that were analyzed. Based on the fresh weight of kimchi, among the macro elements, the concentrations of Na and K were relatively high, with values of 4181.9–9919.8 mg kg−1 and 1661.8–6623.5 mg kg−1, respectively. Among the trace elements that were analyzed, zinc in Korean samples, and strontium in Chinese samples showed the highest concentrations, at 2.67 and 2.98 mg kg−1, respectively. Concentration levels of the toxic trace elements were within permissible limits. The amount of daily intake and provisional daily intake of each element calculated based on kimchi intake confirmed its safety for consumption. Linear discriminant analysis and PCA successfully discriminated among the samples of Chinese and Korean origin. CONCLUSION The provisional daily intake of the toxic elements was within provisional tolerable daily intake values. The normal intake of kimchi could not pose a threat upon consumption. © 2019 Society of Chemical Industry

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“…The techniques of sample preparation for agricultural material are similar for foods and biological material (Anzano et al, 1995;De la Fuente et al, 1995;TahaH n et al, 1995). Probably, no other aspect of sample preparation prior to elemental analysis has caused as much controversy as that which surrounds how best to destroy the organic matter portion of a sample.…”

Section: Introductionmentioning

confidence: 99%

Zinc and Manganese Analysis in Maize by Microwave Oven Digestion and Flame Atomic Absorption Spectrometry

Anzano

Asensio

Anwar

et al. 2000

Journal of Food Composition and Analysis

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Manganese and Zinc Analysis in Milk by Microwave Oven Digestion and Platform Graphite Furnace Atomic Absorption Spectrometry

Cited by 23 publications

References 9 publications

New methods for acceleration of meat sample preparation prior to determination of the metal content by atomic absorption spectrometry

New methods for acceleration of meat sample preparation prior to determination of the metal content by atomic absorption spectrometry

Dietary intake assessment of macro, trace, and toxic elements via consumption of kimchi in South Korea

Zinc and Manganese Analysis in Maize by Microwave Oven Digestion and Flame Atomic Absorption Spectrometry

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