scholarly journals CHEMOMETRIC STRATEGY FOR OPTIMIZATION OF AN ACID DECOMPOSITION METHOD TO DETERMINE THE MINERAL COMPOSITION IN ALMOND PULP (Terminalia catappa Linn.)

Química Nova ◽  
2021 ◽  
Author(s):  
Ana Santos ◽  
Liz Santos ◽  
Lorena Santos ◽  
Emmanuelle Silva ◽  
João Santos ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Optical Emission ◽  
Pharmaceutical Products ◽  
Optimization Techniques ◽  
Future Application ◽  
Emission Spectrometry ◽  
Acid Digestion ◽  
Digestion Efficiency

In this work, multivariate optimization techniques were applied to develop an acid digestion procedure in digester block using “cold finger” as reflux system to determine minerals in almond pulp samples by inductively coupled plasma optical emission spectrometry. Two-level full factorial design and Box-Behnken design were applied to evaluate and optimize the factors involved in the acid digestion process. In both experimental designs, Function D and Function MR multiple responses were used to establish the method condition for all analytes and with greater digestion efficiency. Two apple and spinach leaves certified reference materials were analyzed to confirm the proposed method accuracy. The digestion efficiency was evaluated by residual carbon content which showed 1.32-1.77% range. The concentration values found for each element in almond pulp collected in Salvador, Bahia, Brazil in mg 100 g-1 were: 3.08 (Ca), 0.209 (Cu), 0.407 (Fe), 356 (K), 21.5 (Mg), 0.096 (Mn), 34.4 (P) and 0.289 (Zn). The developed method was simple and efficient for almond pulp mineral composition evaluation. This unconventional fruit has nutritional relevance with future application for new food recipes and pharmaceutical products formulation.

scholarly journals Assessment of essential elements and chemical contaminants in thirteen fish species from the Bay Aratu, Bahia, Brasil

2016 ◽  
Vol 76 (4) ◽  
pp. 871-877 ◽  
Author(s):  
E. Silva ◽  
Z. C. V. Viana ◽  
N. F. A. Souza ◽  
M. G. A. Korn ◽  
V. L. C. S. Santos
Keyword(s):  
Fish Species ◽  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Principal Component ◽  
Optical Emission ◽  
Hierarchical Cluster ◽  
Essential Elements ◽  
Emission Spectrometry ◽  
Oyster Tissue ◽  
National Agency

Abstract Concentrations of ten elements (Cd, Cr, Cu, Fe, Ni, Pb, Se, Sr, V and Zn) were determinate in muscle tissues of 13 fish species from Aratu Bay, Bahia, Brazil by inductively coupled plasma optical emission spectrometry. The accuracy and precision of our results were checked by using two certified reference materials: BCR-422 cod muscle and SRM 1566b oyster tissue. The average trace element concentrations in the fish species varied in the following ranges, in μg g–1: 0.03-0.8 for Cr; 2.0-33.7 for Cu, 2.4-135.1 for Fe, 1.6-25.6 for Se; 1.6-35.1 for Sr; and 2.8-40.5 for Zn. The Diaptereus rhombeus (carapeba) specie presented the highest concentrations of Se, Cu and Fe. Chromium and Se were present at levels above the limit of tolerance allowed by the National Agency of Sanitary Vigilance (ANVISA). The results were also evaluated using the multivariate analysis techniques: principal component analysis (PCA) and hierarchical cluster analysis (HCA).

scholarly journals Foliar Elemental Analysis of Brazilian Crops via Portable X-ray Fluorescence Spectrometry

Sensors ◽  
2020 ◽  
Vol 20 (9) ◽  
pp. 2509 ◽  
Author(s):  
Camila S. Borges ◽  
David C. Weindorf ◽  
Geila S. Carvalho ◽  
Luiz R. G. Guilherme ◽  
Thalita Takayama ◽  
...  
Keyword(s):  
Strong Correlation ◽  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Management Strategies ◽  
Optical Emission ◽  
Plant Nutrients ◽  
Toxic Waste ◽  
Acid Digestion ◽  
X Ray ◽  
Rapid Characterization

Foliar analysis is very important for the nutritional management of crops and as a supplemental parameter for soil fertilizer recommendation. The elemental composition of plants is traditionally obtained by laboratory-based methods after acid digestion of ground and sieved leaf samples. This analysis is time-consuming and generates toxic waste. By comparison, portable X-ray fluorescence (pXRF) spectrometry is a promising technology for rapid characterization of plants, eliminating such constraints. This worked aimed to assess the pXRF performance for elemental quantification of leaf samples from important Brazilian crops. For that, 614 samples from 28 plant species were collected across different regions of Brazil. Ground and sieved samples were analyzed after acid digestion (AD), followed by quantification via inductively coupled plasma optical emission spectroscopy (ICP-OES) to determine the concentration of macronutrients (P, K, Ca, Mg, and S) and micronutrients (Fe, Zn, Mn, and Cu). The same plant nutrients were directly analyzed on ground leaf samples via pXRF. Four certified reference materials (CRMs) for plants were used for quality assurance control. Except for Mg, a very strong correlation was observed between pXRF and AD for all plant-nutrients and crops. The relationship between methods was nutrient- and crop-dependent. In particular, eucalyptus displayed optimal correlations for all elements, except for Mg. Opposite to eucalyptus, sugarcane showed the worst correlations for all the evaluated elements, except for S, which had a very strong correlation coefficient. Results demonstrate that for many crops, pXRF can reasonably quantify the concentration of macro- and micronutrients on ground and sieved leaf samples. Undoubtedly, this will contribute to enhance crop management strategies concomitant with increasing food quality and food security.

scholarly journals Chlorine determination in medicinal plants by potentiometry with ion-selective electrode after microwave-induced combustion

2021 ◽  
Vol 5 (1) ◽  
pp. 19-25
Author(s):  
Mariele Samuel Nascimento ◽  
Gabriel Toneto Druzian ◽  
Rochele Sogari Picoloto ◽  
Paola Azevedo Mello ◽  
Erico M. M. Flores
Keyword(s):  
Medicinal Plants ◽  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Optical Emission ◽  
Ion Selective Electrode ◽  
Emission Spectrometry ◽  
Selective Electrode ◽  
Complete Combustion ◽  
Inductively Coupled ◽  
Relative Standard

A method based on microwave-induced combustion (MIC) was applied for medicinal plants digestion allowing further chlorine determination by potentiometry using ion-selective electrode (ISE). Sample masses ranging from 500 to 1000 mg were evaluated for MIC digestion. Water and 10, 25, 50, and 100 mmol/L NH4OH were investigated as absorbing solutions. The accuracy of the proposed method was evaluated by using certified reference materials (CRMs), by recovery tests (500 µg/g), and also by comparison with the results obtained by inductively coupled plasma optical emission spectrometry (ICP-OES) after microwave-assisted alkaline extraction (MAE). Using water or NH4OH solutions (10 to 100 mmol/L), recoveries close to 100% and relative standard deviation lower than 5% were obtained. Results were in agreement with CRMs values (better than 95%) and also with those values obtained by using the MAE method. The main advantage of the proposed method was the complete combustion of high sample mass (1000 mg) resulting in low quantification limit (12.5 µg/g) and chlorine determination at low concentration by ISE. Another advantage of the proposed method was the high chlorine stability in digests (up to 30 days of storage) even using water as absorbing solution, which is in agreement with green analytical chemistry recommendations. Finally, the proposed MIC method was applied for commercial medicinal plants and the chlorine concentration was in the range of 59.4 ± 1.4 to 2038 ± 70 µg/g. The proposed MIC method was considered suitable for quality control for chlorine determination in medicinal plants.

scholarly journals Comparison of Partial Digestion Procedures for Determination of Ca, Cr, Cu, Fe, K, Mg, Mn, Na, P, and Zn in Milk by Inductively Coupled Plasma-Optical Emission Spectrometry

2004 ◽  
Vol 87 (1) ◽  
pp. 151-156 ◽  
Author(s):  
Carmen S Kira ◽  
Franca D Maio ◽  
Vera A Maihara
Keyword(s):  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Hot Plate ◽  
Inductively Coupled ◽  
Large Numbers ◽  
Partial Digestion ◽  
Fast Procedure

Abstract A fast procedure was developed for determination of Ca, Cr, Cu, Fe, K, Mg, Mn, Na, P, and Zn in milk samples. This procedure consisted of a partial digestion with hydrochloric acid on a hot plate. The results obtained were compared with 3 other digestion procedures (dry ashing and 2 microwave digestions). All the procedures showed similar precision levels, with coefficients of variation <10% for most analyzed elements. Accuracy was evaluated by using certified reference materials, and the values obtained were within the confidence intervals for these products. The results obtained were not considered statistically different. The partial digestion on a hot plate with HCl can be very practical for laboratories with relatively large numbers of sample analyses.

scholarly journals Mineral Composition of Herbaceous Species Seseli rigidum and Seseli pallasii: a Chemometric Approach

2021 ◽  
Vol 68 (3) ◽  
pp. 709-717
Author(s):  
Marija D. Ilić ◽  
Violeta D. Mitić ◽  
Snežana B. Tošić ◽  
Aleksandra N. Pavlović ◽  
Marija S. Marković ◽  
...  
Keyword(s):  
Mineral Composition ◽  
Inductively Coupled Plasma ◽  
Principal Component ◽  
Optical Emission ◽  
Hierarchical Cluster ◽  
Balkan Peninsula ◽  
Emission Spectrometry ◽  
Medicinal Species ◽  
Multivariate Statistic ◽  
Pharmaceutical Industries

Nutrients play an essential role in many metabolic processes whose deficiency or excess can be harmful to the plant itself and through the food chain to both animals and humans. Medicinal plants used in the food and pharmaceutical industries can be contaminated with increased concentrations of heavy metals. The plant species Seseli rigidum and Seseli pallasii from the Balkan Peninsula are used in traditional medicine and spices in the diet, so it was necessary to determine the mineral composition to ensure their safe application. In this work, the mineral composition was determined in medicinal species of the genus Seseli using inductively coupled plasma with optical emission spectrometry (ICP-OES). Two multivariate statistic methods –principal component analysis (PCA) and hierarchical cluster analysis (HCA) were applied to distinguish samples regarding their mineral composition. The mineral composition of both studied species is following the literature data. The results obtained using multivariate statistics methods agree and distinguish certain parts of the tested plants based on the highest content of micro, macro, or trace elements.

Mineral Profile of Children’s Fast Food Menu Samples

2017 ◽  
Vol 100 (6) ◽  
pp. 1879-1884 ◽  
Author(s):  
Manuela Ruiz-de-Cenzano ◽  
Arancha Rochina-Marco ◽  
Óscar López-Salazar ◽  
Maria Luisa Cervera ◽  
Miguel de la Guardia
Keyword(s):  
Fast Food ◽  
Inductively Coupled Plasma ◽  
Certified Reference Materials ◽  
Soft Drink ◽  
Optical Emission ◽  
Rice Flour ◽  
Emission Spectrometry ◽  
Analytical Methodology ◽  
Inductively Coupled ◽  
Mineral Profile

Abstract Children’s fast food menus, including hamburgers served with french fries, dessert, and a soft drink, were analyzed to obtain the mineral profile of trace elements. The developed analytical methodology involved sample digestion under pressure inside a microwave oven with a mixture of HNO3 and H2O2 and inductively coupled plasma-optical emission spectrometry. The method was validated by carrying out the analysis of certified reference materials (NIST 1570a spinach leaves, NCS ZC73016 chicken, and NIST 1568a rice flour) and using recovery experiments. Repeatability was verified by analyzing replicate samples. Twenty-six elements were studied, 12 of which—aluminum, barium, calcium, copper, iron, potassium, lithium, magnesium, manganese, sodium, strontium, and zinc—were quantitatively determined. Results were compared with other studies of fast food and children’s menus published in the literature, and the nutritional value of samples was assessed with dietary intake guidelines.

scholarly journals Trace Elements in Edible Flowers from Italy: Further Insights into Health Benefits and Risks to Consumers

Molecules ◽  
2020 ◽  
Vol 25 (12) ◽  
pp. 2891 ◽  
Author(s):  
Giuliana Drava ◽  
Valeria Iobbi ◽  
Rafaël Govaerts ◽  
Vincenzo Minganti ◽  
Andrea Copetta ◽  
...  
Keyword(s):  
Trace Elements ◽  
Mineral Composition ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Essential Elements ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Low Concentrations ◽  
Plasma Optical Emission Spectrometry ◽  
Ancient Times

The use of edible flowers in cooking dates back to ancient times, but recently it is gaining success among the consumers, increasingly attentive to healthy and sustainable foods of high quality, without neglecting taste, flavour, and visual appeal. The present study aims to deepen the knowledge regarding the mineral composition of edible flowers, an aspect not widely investigated in scientific literature. The concentrations of Cd, Co, Cu, Fe, Mn, Ni, Pb, Sr, V, and Zn have been determined by Inductively Coupled Plasma Optical Emission Spectrometry (ICP OES) in flowers belonging to a wide variety of species. The study highlights that some floral species are characterized by significantly higher concentrations of certain trace elements, e.g., the flowers of Acmella oleracea for Mn, those of basil (Ocimum basilicum) and of pumpkins (Cucurbita moschata and C. pepo) for Cu and Sr, and those of orange daylily (Hemerocallis fulva) for Ni. Potentially toxic elements are present at low concentrations, often below the limit of the detection for Cd, Co, Ni, V. In all samples, Cd and Pb are well below the maximum permitted levels in foodstuffs. It can be concluded that the edible flowers analyzed can be considered a good source of essential elements and do not present risks for the consumer health as for the mineral composition.

Determination of Antimony in Recycled Polyester Fiber by ICP-OES with Different Pretreatment Methods

2020 ◽  
Vol 993 ◽  
pp. 1502-1510
Author(s):  
Ling Ling Gao ◽  
Ye Chen ◽  
Ning Wang ◽  
Shan Shan Liu ◽  
Yu Hui Wang ◽  
...  
Keyword(s):  
Heavy Metal ◽  
Inductively Coupled Plasma ◽  
Microwave Digestion ◽  
Volume Ratio ◽  
Optical Emission ◽  
Polyester Fiber ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Acid Digestion ◽  
Dry Ashing

As consumer awareness of heavy metal content in textile increased, it is necessary to develop analytical methods that identify and quantify heavy metals. In order to comprehensively investigate the potential risks of antimony (Sb) in recycled polyester fiber to humans health, this study developed acid digestion method, with the condition that the volume ratio of concentrated sulfuric acid to hydrogen peroxide was 1, and digested at 200°Cfor 1.5h, which produced clear and colorless solutions.Currently, microwave and dry ashing are also common methods for digesting polyethylene terephthalate samples. Three pretreatment methods for determining the content of Sb in recycled polyester fibers was evaluated. Results showed that inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis of acid digested recycled polyester samples resulted in Sb content higher than for the microwave and dry ashing digestion methods which incompletely digest recycled polyester. Moreover, compared with microwave digestion and dry ashing, acid digestion had a low detection limit of 0.0116 ug/mL, a high spike recovery of 82% to 106% and the RSD value less than 2%, which indicates that the data was accurate and reproducible. Therefore, in this study, acid digestion - ICP-OES was an effective method for detecting the content of heavy metal Sb in recycled polyester.

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