Elemental profiling and geographical differentiation of Ethiopian coffee samples through inductively coupled plasma-optical emission spectroscopy (ICP-OES), ICP-mass spectrometry (ICP-MS) and direct mercury analyzer (DMA)

Habte, Girum; Hwang, In Min; Kim, Jae Sung; Hong, Joon Ho; Hong, Young Sin; Choi, Ji Yeon; Nho, Eun Yeong; Jamila, Nargis; Khan, Naeem; Kim, Kyong Su

doi:10.1016/j.foodchem.2016.05.178

Cited by 77 publications

(42 citation statements)

References 26 publications

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“…Considering that the determinations of some elements by ICP‐MS suffer from polyatomic interference, collision/reaction cells were used to remove/reduce those interferences. For example, this was the case for nickel signal at m / z 58 by NaCl . In addition, the absence of polyatomic interferences was checked by measuring several isotopes of the elements to discover the most abundant isotope with the least interference.…”

Section: Methodsmentioning

confidence: 99%

“…For example, in the case of selenium, three isotopes ( 77 Se, 78 Se and 82 Se) were checked and 82 Se was found to have no interference. Therefore, it was selected for measuremenent …”

Section: Methodsmentioning

confidence: 99%

“…Precision was evaluated in terms of percent coefficients of variance (CV%), which in turn were obtained by measuring the relative standard deviation of ten repeated replicates of one sample. Analytical quality control was verified by recovery experiments for the 45 selected elements, spiking at two selected concentration levels of 100 and 1000 µg kg −1 as per their concentrations in the samples before microwave‐assisted digestion …”

Section: Methodsmentioning

confidence: 99%

“…Elements such as chromium, copper, manganese, nickel and zinc are considered micro elements, whereas those such as selenium, cobalt and vanadium are categorized as trace elements . In addition to these, trace elements such as arsenic, cadmium, lead and mercury are well documented in the literature as toxic to humans and other animals …”

Section: Introductionmentioning

confidence: 99%

“…6,10 In addition to these, trace elements such as arsenic, cadmium, lead and mercury are well documented in the literature as toxic to humans and other animals. 11,12 Good analytical measurements are always required on a regular basis to monitor the levels of macro, micro and trace elements in foods such as citrus fruits, as any increase or deficiency beyond their critical limits causes serious disturbances in the whole physiological system. [13][14][15] Among the various analytical techniques used in the recent past for elemental analyses in foods, inductively coupled plasma-mass spectrometry (ICP-MS) and inductively coupled plasma-optical emission spectrometry (ICP-OES) are the most widely employed and recommended methods due to their well-known advantages of sensitivity, selectivity and multi-element analysis capabilities.…”

Section: Introductionmentioning

confidence: 99%

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Determination of macro, micro and trace elements in citrus fruits by inductively coupled plasma–optical emission spectrometry (ICP‐OES), ICP–mass spectrometry and direct mercury analyzer

et al. 2018

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BACKGROUND Citrus fruits are widely consumed around the world. Several elements are known to have important physiological functions in living things, whereas others are reported to have toxic effects. This study was aimed to analyze the concentration of macro, micro and trace elements in citrus fruit varieties. Samples were acid digested using a microwave system and analyzed for macro elements by inductively coupled plasma–optical emission spectrometry (ICP‐OES) and for micro and trace elements by inductively coupled plasma–mass spectrometry (ICP‐MS). The application of analytical techniques was analyzed by determining method validation parameters including limits of detection and quantification, linearity, precision, spiking experiments and analyzing certified reference material (NIST CRM‐1570a), Spinach leaves. RESULTS The elemental levels of citrus fruits were found largely to be dependent upon the type of analyzed samples. Among nutritionally important elements, citrus fruits were good sources of potassium (95.13–270.4 mg kg−1), calcium (10.57–75.29 mg kg−1), zinc (466.5–1611 µg kg−1) and manganese (35.35–1902 µg kg−1). The concentrations of toxic elements (Pb, Cd, As, Al, Hg) were very low. CONCLUSION In general, the concentrations of analyzed elements were within the critical levels specified by the Food and Agriculture Organization/World Health Organization and Food and Nutrition Board USA. Linear discriminant analysis successfully separated the samples into clear groups with 93.9% correct classification. © 2018 Society of Chemical Industry

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Section: Methodsmentioning

confidence: 99%

“…For example, in the case of selenium, three isotopes ( 77 Se, 78 Se and 82 Se) were checked and 82 Se was found to have no interference. Therefore, it was selected for measuremenent …”

Section: Methodsmentioning

confidence: 99%

Section: Methodsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Determination of macro, micro and trace elements in citrus fruits by inductively coupled plasma–optical emission spectrometry (ICP‐OES), ICP–mass spectrometry and direct mercury analyzer

et al. 2018

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Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Hou

Zeinu

Gao

et al. 2018

Energy & Environ Materials

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The increase in release of toxic heavy metals into natural water attracts much attention due to its devastating effect on ecology and human health. The design and implementation of green electrode materials is pivotal for improving the electrochemical performance of in situ heavy metal monitoring. This work reviews various novel electrode materials and hybrid materials that improve electrochemical detection. Modified green and novel electrode materials offer better performance due to their improved deposition with wide linear and enhanced response under optimized sensing parameters. In particular, recent works related to gold, carbon materials, bismuth, and metal oxide‐based electrodes are reviewed. The environmentally friendly (“green”) characteristics, as well as their versatility and flexibility, are especially emphasized. In addition, synthesis methods and novel designs of electrode integration are highlighted. Most of the substantial achievements as well as breakthroughs in recent years are surveyed, and the challenges and prospective in this field are also identified.

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Improved geographical origin discrimination for tea using ICP‐MS and ICP‐OES techniques in combination with chemometric approach

Liu

Zeng²,

Zhao

et al. 2020

J Sci Food Agric

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BACKGROUNDThere is an urgent need to strengthen the testing and certification of geographically iconic foods, as well as to use discriminatory science and technology for their regulation and verification. Multi‐element and stable isotope analyses were combined to provide a new chemometric approach for improving the discrimination tea samples from different geographical origins. Different stoichiometric methods [principal component analysis (PCA), hierarchical cluster analysis (HCA), partial least squares‐discriminant analysis (PLS‐DA), back propagation based artificial neural network (BP‐ANN) and linear discriminant analysis (LDA)] were used to demonstrate this discrimination approach using Yongchuanxiuya tea samples in an experimental test.RESULTSMulti‐element and stable isotope analyses of tea samples using inductively coupled plasma mass spectrometry and inductively coupled plasma optical emission spectrometry easily distinguished the geographical origins. However, the clustering ability of the two unsupervised learning methods (PCA and HCA) were worse compared to that of the three supervised learning methods (PLS‐DA, BP‐ANN and LDA). BP‐ANN and LDA, with 100% recognition and prediction abilities, were found to be better than PLS‐DA. 86Sr and 112Cd were the markers enabling the successful classification of tea samples according to their geographical origins. Under the validation by ‘blind’ dataset, the prediction accuracies of the BP‐ANN and LDA methods were all greater than 90%. The LDA method showed the best performance, with an accuracy of 100%.CONCLUSIONIn summary, determination of mineral elements and stable isotopes using inductively coupled plasma mass spectrometry and inductively coupled plasma optical emission spectrometry techniques coupled with chemometric methods, especially the LDA method, is a good approach for improving the authentication of a diverse range of tea. The present study contributes toward generalizing the use of fingerprinting mineral elements and stable isotopes as a promising tool for testing the geographic roots of tea and food worldwide. © 2020 Society of Chemical Industry

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Elemental profiling and geographical differentiation of Ethiopian coffee samples through inductively coupled plasma-optical emission spectroscopy (ICP-OES), ICP-mass spectrometry (ICP-MS) and direct mercury analyzer (DMA)

Cited by 77 publications

References 26 publications

Determination of macro, micro and trace elements in citrus fruits by inductively coupled plasma–optical emission spectrometry (ICP‐OES), ICP–mass spectrometry and direct mercury analyzer

Determination of macro, micro and trace elements in citrus fruits by inductively coupled plasma–optical emission spectrometry (ICP‐OES), ICP–mass spectrometry and direct mercury analyzer

Recent Advances and Perspective on Design and Synthesis of Electrode Materials for Electrochemical Sensing of Heavy Metals

Improved geographical origin discrimination for tea using ICP‐MS and ICP‐OES techniques in combination with chemometric approach

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