Minimal-Invasive Analytical Method and Data Fusion: an Alternative for Determination of Cu, K, Sr, and Zn in Cocoa Beans

Gamela, Raimundo R.; Pereira-Filho, Edenir Rodrigues; Pereira, Fernando Mendes

doi:10.1007/s12161-020-01904-2

Cited by 10 publications

(6 citation statements)

References 32 publications

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“…Nowadays, microwave‐assisted digestion is widely accepted as one of the most useful pretreatment techniques for food matrices [7–16, 20, 21]. Among the various reagents employed in microwave‐assisted digestion, concentrated HNO 3 is preferentially used due to its high purity and broad oxidative ability.…”

Section: Resultsmentioning

confidence: 99%

“…To date, various analytical techniques, such as inductively coupled plasma-mass spectrometry (ICP-MS) [7][8][9][10], inductively coupled plasma-optical emission spectrometry (ICP-OES) [11][12][13], and flame/electrothermal atomic absorption spectrometry (AAS) [14][15][16], have been used for the determination of metals in food. ICP-MS and ICP-OES are widely used due to their superior features (e.g., simultaneous multielement determination, extraordinary analytical sensitivity, and so on) [17,18]; however, the instrument procurement/running cost are quite expensive and require highly skilled instrument operators.…”

Section: Introductionmentioning

confidence: 99%

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Rapid determination of metallic additives in century eggs by microwave plasma‐atomic emission spectrometer and microwave‐assisted digestion

Chen,

Weng,

Wang

et al. 2024

J Chinese Chemical Soc

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Century eggs (also known as pídàn) are a widely used preserved food product in Taiwanese cuisine. Due to their peculiar appearance, pungent odor, and unusual texture, several consumers have raised concerns. Actually, some metallic additives are employed to control the quality of gelation of protein during the production of century eggs. Therefore, a method involving microwave plasma‐atomic emission spectrometer and microwave‐assisted digestion was proposed in this study. In addition, to clarify distribution information of metallic additives in century eggs, detailed analyses based on the egg structure were adopted. The linearities for Fe and Zn were obtained in the range of 0.1–5, and 0.02–1 mg L−1 for Cu and Pb. The method detection limits for test metals were 0.06–0.036 mg L−1. The measured values for the RM EGGS‐1 sample agreed reasonably well with the reference values, demonstrating that the developed method is practical for routine analysis with lower instrument procurement/running cost. The analytical results for century eggs collected from local markets revealed diverse distributions of metal ions in different parts. Remarkably, this method can readily identify the metallic additives used during the production processes even in the presence of complicated matrices.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Rapid determination of metallic additives in century eggs by microwave plasma‐atomic emission spectrometer and microwave‐assisted digestion

Chen,

Weng,

Wang

et al. 2024

J Chinese Chemical Soc

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“…The models were effective for Cd, Cr, Cu, Hg, Pb and Zn but As did not perform well, yet the authors did not offer an explanation for this finding. Gamela et al 98 determined Cu, K, Sr and Zn in cocoa beans by direct analysis. The values obtained using a PLS calibration model compared well against those of the reference method based on acid MAD and ICP-OES measurement, and the analysis of a number of CRMs gave results of acceptable accuracy (85–120%).…”

Section: Progress With Analytical Techniquesmentioning

confidence: 99%

“…The work demonstrated the potential for the direct analysis of coffee, but the validation would have benefitted by the inclusion of RMs or spiked samples. Gamela and co-workers 98 also utilised EDXRF for cocoa beans in combination with LIBS and ICP-OES – the paper is further discussed in Section 4.3.…”

Section: Progress With Analytical Techniquesmentioning

confidence: 99%

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

Patriarca

Barlow

Cross³

et al. 2022

J. Anal. At. Spectrom.

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“…[7][8][9] Direct analysis of leaf sample pellets using laser-induced breakdown spectroscopy (LIBS) has aroused the interest of the scientific community in recent years. [10][11][12][13] Analysis using pellets promotes a decrease in the steps of the analytical sequence, 14 simplifying the analysis process when compared to conventional methods that require intense sample decomposition 15 to obtain a homogeneous aqueous solution with the help of acids and hydrogen peroxide. [16][17][18][19][20] In a study performed by Andrade et al, 21 the authors compared LIBS and ICP-OES analyses of samples of medicinal herbs rich in flavonoids from Eastern Europe.…”

Section: Introductionmentioning

confidence: 99%

Direct Determination of Ca, K, and Mg in Soy Leaf Samples Using Laser-Induced Breakdown Spectroscopy

Assis,

Ferreira,

Bócoli

et al. 2023

Appl Spectrosc

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This study was dedicated to developing analytical methods for determining macronutrients (Ca, K, and Mg) in soy leaf samples with and without petioles. The study's primary purpose was to present Laser-induced breakdown spectroscopy (LIBS) as a viable alternative for directly analyzing leaf samples using chemometric tools to interpret the data obtained. The instrumental condition chosen for LIBS was 70 mJ of laser pulse energy, 1.0 µs of delay time, and 100 µm of spot size, which was applied to 896 samples: 305 of soy without petioles and 591 of soy with petioles. The reference values of the analytes for the proposition of calibration models were obtained using inductively coupled plasma optical emission spectroscopy (ICP-OES) technique. Twelve normalization modes and two calibration strategies were tested to minimize signal variations and sample matrix microheterogeneity. The following were studied: multivariate calibration using partial least squares and univariate calibration using the area and height of several selected emission lines. The notable normalization mode for most models was the Euclidean norm. No analyte showed promising results for univariate calibrations. Micronutrients, P and S, were also tested, and no multivariate models presented satisfactory results. The models obtained for Ca, K, and Mg showed good results. The standard error of calibration ranged from 2.3 g/kg for Ca in soy leaves without petioles with two latent variables to 5.0 g/kg for K in soy leaves with petioles with two latent variables.

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Minimal-Invasive Analytical Method and Data Fusion: an Alternative for Determination of Cu, K, Sr, and Zn in Cocoa Beans

Cited by 10 publications

References 32 publications

Rapid determination of metallic additives in century eggs by microwave plasma‐atomic emission spectrometer and microwave‐assisted digestion

Rapid determination of metallic additives in century eggs by microwave plasma‐atomic emission spectrometer and microwave‐assisted digestion

Atomic spectrometry update: review of advances in the analysis of clinical and biological materials, foods and beverages

Direct Determination of Ca, K, and Mg in Soy Leaf Samples Using Laser-Induced Breakdown Spectroscopy

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