Levels of selected metals in coriander (Coriandrum sativum L.) leaves cultivated in four different areas of Ethiopia

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Pearson Correlation ◽  
Absorption Spectrometry ◽  
Coriandrum Sativum ◽  
Good Source ◽  
Digestion Method ◽  
Flame Atomic Absorption ◽  
Significant Difference ◽  
Metal Levels ◽  
Good Percentage ◽  
Coriander Leaves

Coriander (Coriandrum sativum L.) is one of the herbs which is used for medicinal and food purposes. In the present study the levels of selected metals in coriander leaves were determined in the samples collected from four different farmlands (Sebeta, Mekanisa, Holeta and Gefersa) in Ethiopia where its cultivation is common. The levels of metals were determined after digestion of samples with the mixture of 4 mL of HNO3 and 4 mL of HClO4 at 300 oC for 3:00 hours by flame atomic absorption spectrometry. The optimized wet digestion method for coriander leaves analysis was validated through the recovery experiment and a good percentage recovery was obtained (93.2-101%). The levels of metals were found in the range Ca, 2319–3503 mg/kg; Zn, 33.4–54.8 mg/kg and Cr, 5.55-9.86 mg/kg while the trace metals Cu, Ni, Cd and Pb were too low to be detected. The results indicated that Ethiopian coriander is a good source of essential metals and free from the toxic metals Pb and Cd. A statistical analysis of variance (ANOVA) at 95% confidence level indicated that there is significant difference (p < 0.05) in the levels of all detected metals between the four sample means. The Pearson correlation was used to predict the dependence of metal levels on one another. The levels of the metals determined in this study compared well with those reported for coriander leaves from some other parts of the world.

scholarly journals Nutritional value of cooked and sous-vide beef: mineral compounds content

2020 ◽  
Vol 79 (OCE2) ◽  
Author(s):  
Monika Modzelewska-Kapituła ◽  
Renata Pietrzak-Fiećko ◽  
Katarzyna Tkacz ◽  
Adam Więk ◽  
Julia Bogdanowicz
Keyword(s):  
Nutritional Value ◽  
Absorption Spectrometry ◽  
Institute Of Medicine ◽  
Good Source ◽  
Flame Atomic Absorption ◽  
Steam Cooking ◽  
Daily Allowance ◽  
Males And Females ◽  
Sous Vide ◽  
Cooked Meat

AbstractMeat, including beef, is a rich source of minerals in the human diet(1,2). However, different thermal treatments might affect minerals concentration in beef and thus its nutritional value. The aim of the study was to determine the degree of coverage of the demand for minerals by consuming 100 g of steam-cooked and sous-vide beef. Material for the study were semimembranosus muscles (n = 12), cut into 2.5 cm thick steaks, which were subjected to steam cooking to obtain 75°C in geometric centre and sous-vide treatment at 60°C for 4 h. The content of minerals was analyzed by flame atomic absorption spectrometry method (flame:acetylene-air). Percentages of the recommended daily allowance (RDA) of Ca, Cu, Fe, Mg, Zn and the adequate intake (AI) of Mn, K, Na in 100 g of thermal processed beef were determined for adults (males and females, aged 19–50 years) and for children (aged 4–8 years) based on the Institute of Medicine, National Academies, recommendations. The concentration of Ca, Fe, Zn, and Cu was higher in steam-cooked beef, whereas Na and K in sous-vide beef. Thermal processes beef was very good source of Zn and Fe; 100 g of steam-cooked beef satisfied 119% of Zn RDA for children, 54% for males and 74% for females, whereas sous-vide beef 101%, 46% and 63%, respectively. A portion of steam-cooked beef provided 32% of Fe RDA for children, 40% for males and 18% for females, whereas sous-vide beef 21%, 26% and 11%, respectively. The steam-cooked meat was also relatively good source of Cu and provided from 12% RDA (males and females) to 25% (children), whereas sous-vide beef from 10% to 20%, respectively. Thermal processed beef was moderate source for Mg (from 4 to 13% of RDA) and K (from 7 to 9% of AI) and poor source of Ca (up to 0.5% of RDA), Mn (up to 0.3% of AI) and Na (up to 3% of AI). Daily requirements for minerals were satisfied to higher degree by a 100 g portion of steam-cooked beef, which was caused by lower cooking loss than sous-vide samples.

scholarly journals Serum Ultrafiltrable Copper, Total Copper and Caeruloplasmin Concentrations in Gynaecological Carcinomas

1993 ◽  
Vol 30 (6) ◽  
pp. 545-549 ◽  
Author(s):  
Anita Chan ◽  
Felix Wong ◽  
Mano Arumanayagam
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Atomic Absorption Spectrophotometry ◽  
Serum Copper ◽  
Control Subjects ◽  
Flame Atomic Absorption ◽  
Total Copper ◽  
Increase With Increase ◽  
Significant Difference ◽  
And Control

Serum copper and caeruloplasmin concentrations are elevated in various carcinomas, but it is not known whether the rise in serum copper is due to elevation of caeruloplasmin alone or whether it is also due to the elevation of ‘free’ copper. We therefore determined ultrafiltrable copper to answer this question. Serum ultrafiltrate was prepared using the Amicon micropartition system and ultrafiltrable (free) copper was determined by flameless atomic absorption spectrophotometry. Serum total copper was determined by flame atomic absorption spectrometry and caeruloplasmin by rate nephelometry. There was no significant difference in the ultrafiltrable copper concentration between patients with gynaecological tumours and control subjects. However, total copper and caeruloplasmin concentrations were significantly elevated in cancer patients compared with control subjects. In contrast to total copper and caeruloplasmin concentrations, ultrafiltrable copper concentrations showed no significant increase with increase in the stage of the cancer.

Determination of Calcium in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Resolution Continuum Source Flame Atomic Absorption Spectrometry

2014 ◽  
Vol 1010-1012 ◽  
pp. 417-421
Author(s):  
Chao Li ◽  
Shang Long Chen
Keyword(s):  
High Resolution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Comparative Method ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Significant Difference

The aim of this work was to evaluate the microemulsification after incomplete digestion as sample preparation procedure for determination of Ca in leisure foods by high resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). Microemulsions were prepared with digestive liquor and n-butyl alcohol as an auxiliary emulsifier after incomplete digestion treatment. The appropriate fuel flow, 70 L/h, and the optimum burner height, 5 mm, were obtained by single factor experimental design. The results showed that the correlation coefficient was better than 0.999, the characteristic concentration was 0.086 mg/L, the precision (RSD) for 6 replicate measurements of Ca was 1.7% and the average of recoveries was 102.1%. F-test and t-test (95% confidence level) in between the proposed method and the comparative method, using microwave digestion-HR-CS FAAS, had no significant difference. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for determination of metal elements in food.

scholarly journals Multi-element determination of essential and toxic metals in green and roasted coffee beans: A comparative study among different origins using ICP-MS

2021 ◽  
Vol 104 (2) ◽  
pp. 003685042110261
Author(s):  
Dima Albals ◽  
Idrees F Al-Momani ◽  
Reem Issa ◽  
Alaa Yehya
Keyword(s):  
Inductively Coupled Plasma ◽  
Daily Intake ◽  
Absorption Spectrometry ◽  
Roasted Coffee ◽  
Element Determination ◽  
Flame Atomic Absorption ◽  
Icp Ms ◽  
Coffee Beans ◽  
Significant Difference ◽  
Roasted Coffee Beans

The aim of this study is to compare the elemental composition among different coffee varieties consumed in Jordan. Levels of different metallic elements in coffee samples; green and roasted coffee beans from five origins; Brazil, Ethiopia, Kenya, Columbia, and India, collected from the Jordanian market were investigated. Twenty-two elements, including essential and toxic elements such as potassium (K), magnesium (Mg), calcium (Ca), iron (Fe), aluminum (Al), manganese (Mn), copper (Cu), barium (Ba), strontium (Sr), zinc (Zn), chromium (Cr), lead (Pb), nickel (Ni), vanadium (V), cobalt (Co), gallium (Ga), uranium (U), cadmium (Cd), silver (Ag), lithium (Li), indium (In), bismuth (Bi), thorium (Th), and thallium (Ti), were determined using inductively coupled plasma-mass spectrometry (ICP-MS). The detected heavy metals and their intake per 1 cup of coffee did not largely contribute to the recommended daily intake (RDI) and tolerable upper limit of daily intake (TULD) in an adult with an average body weight of 80 kg. The ICP-MS versus flame atomic absorption spectrometry (FAAS) results were linearly fitted, and the correlation coefficients ( R2 > 0.95) were better than 0.95 for the three checked elements. No significant difference between the results of the two techniques was observed ( p > 0.05). The ANOVA results indicated the presence of a significant difference between the levels of Cr, Co, and Zn in green and roasted coffee beans. The results of this study indicated that the coffee consumed in Jordan did not contain toxic levels of heavy elements and is safe for consumption according to health organizations.

Metals in green coffee beans from major coffee-growing regions of Ethiopia

2019 ◽  
Author(s):  
Chem Int
Keyword(s):  
Addis Ababa ◽  
Pearson Correlation ◽  
Capital City ◽  
Green Coffee ◽  
Mineral Contents ◽  
Flame Atomic Absorption ◽  
Green Coffee Beans ◽  
External Calibration Curve ◽  
Coffee Beans ◽  
Significant Difference

The metal contents of green coffee beans cultivated in major coffee growing zones of Ethiopia (Wollega, Sidamo, Harar, Bench Maji and Kafa) have been determined in representative samples of the five coffee varieties collected from Coffee Quality Inspection and Liquoring Center located in Addis Ababa, the capital city of Ethiopia. Different sample preparation procedures were tested by varying reagent volumes and types, digestion time, digestion temperature and amount of the sample to decompose the green coffee beans and solubilize the metals. The optimal procedure required 4 h to completely digest 0.5 g of green coffee beans with 5 mL HNO3 (70%) and 1.5 mL HClO4 (70%) at 270 oC. Concentrations of metals (Ca, Cd, Cr, Co, Cu, Fe, K, Mg, Mn, Ni, Pb and Zn) were determined by flame atomic absorption spectrometer employing a four point external calibration curve. The accuracy of the optimized procedure was evaluated by analyzing sample digests spiked with standard solutions. Recoveries of the spiked samples varied from 90 to 110% in green coffee beans. The metals levels observed in green coffee beans are comparable to literature reports. Cd was not detected in any of the five samples while Pb was detected at trace level in only one of the five samples. This indicated that the Ethiopian green coffee beans are free from the toxic metals. The Pearson correlation coefficients indicated strong to medium positive or negative correlation among the metals in the green coffee beans. The analysis of variance results at 95% confidence level suggested that there were significant difference in the concentrations of all the metals except K between the five sampling areas. Thus, this study has revealed variation of metal composition of green coffee beans with the geographical origin of the coffee verities. The variation in composition among coffee sample might be due the differences in mineral contents of the corresponding soils.

scholarly journals Evaluación de cobre y cinc en suero sanguíneo de pacientes diabéticos con y sin pie diabético

2019 ◽  
Vol 3 (1) ◽  
pp. 14
Author(s):  
Blanca Irene Semprun de Villasmil ◽  
María Fernanda Gómez ◽  
Kelys Milenis Hernández ◽  
Kenna Ferrer ◽  
Engelbert León ◽  
...  
Keyword(s):  
Diabetes Mellitus ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Diabetic Foot ◽  
Absorption Spectrometry ◽  
Serum Levels ◽  
Diabetic Patients ◽  
Flame Atomic Absorption ◽  
Significant Difference ◽  
Cu And Zn

Los micronutrientes, cobre (Cu) y cinc (Zn) cumplen funciones indispensables para el desarrollo y crecimiento celular. Por tal razón, este trabajo presenta la evaluación de los niveles séricos de Cu y Zn de pacientes diabéticos con y sin pie diabético (DPD y DSPD) con edades comprendidas entre 55 y 75 años, empleando la espectrometría de absorción atómica con llama. Las muestras, una vez extraídas, se trasvasaron a tubos de polipropileno sin anticoagulante, se separaron por centrifugación para la obtención del suero y se almacenaron a 4 °C hasta su análisis. Para la determinación espectrométrica de Cu y Zn, las muestras se diluyeron con agua desionizada (2x). Las concentraciones medias de Cu y Zn para los DPD fueron de 1,017 y 1,134 mg/L para Cu; y de 1,009 y 0,907 mg/L para Zn, mientras que en DSPD fueron de 1,094 y 0,970 mg/L para Cu; y de 0,661 y 0,807 mg/L para Zn, en mujeres y hombres, respectivamente, sin que existieran diferencias (p>0,05) en las concentraciones de Cu y Zn entre los DPD y DSPD, encontrándose diferencias significativas (p≤0,05) en las concentraciones de Zn en mujeres DSPD. En consecuencia, se puede concluir que los niveles de Cu y Zn están en concentraciones adecuadas para ambos grupos, lo que permite inferir que el metabolismo de estos oligoelementos se encuentra en equilibrio en los pacientes DPD y DSPD, debido a la adecuada ingesta de dichos minerales diariamente.   Palabras clave: Espectrometría de absorción atómica con llama, Cu, Zn, pie diabético, diabetes mellitus.   Abstract Copper and zinc micronutrients fulfill essential functions for cell growth and development. For this reason, this paper presents the evaluation of serum levels of Cu and Zn of diabetic patients with and without diabetic foot (DPD and DSPD) aged between 55 and 75 years, using flame atomic absorption spectrometry. Once the samples were extracted, were transferred to polypropylene tubes without anticoagulant, which were separated by centrifugation to obtain the serum, and stored at 4°C until their analysis. For the spectrometric determination of Cu and Zn the samples were diluted with deionized water (2x). The mean concentrations of Cu and Zn for the DPD groups was 1.017mg/L; 1,134mg/L for copper; and 1.009mg/L; 0.907mg/L for Zn and the DSPD group was 1.094mg/L; 0.970mg/L for copper; and 0.661mg/L; 0.807mg/L for Zn, in women and men respectively, so there is no significant difference (p>0.05) in the Cu and Zn concentrations at DPD and DSPD, finding significant differences (p≤0.05) in Zn´s concentrations in women DSPD. Consequently, it can be concluded that Cu and Zn levels are in adequate concentrations for both groups. This allows to infer that metabolism of these trace elements is in equilibrium in the DPD and DSPD patients, due to the adequate intake of these minerals daily.   Keywords: Atomic absorption spectrometry flame, copper, zinc, diabetic foot, diabetes mellitus.

scholarly journals The evaluation of Cu, Zn, Mn, and Se concentrations in the hair of South American camelids

2017 ◽  
Vol 86 (2) ◽  
pp. 141-149
Author(s):  
Milada Holasová ◽  
Alena Pechová ◽  
Taťána Husáková
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Absorption Spectrometry ◽  
Coat Colour ◽  
The Body ◽  
South American ◽  
South American Camelids ◽  
Flame Atomic Absorption ◽  
Significant Difference

The aim of this study was to monitor the content of trace elements in the hair of South American camelids and to evaluate the effect of coat colour, species, age, and sex on their concentration in the hair. The samples were collected from 77 animals – 23 llamas (Llama guanicoe f. gllama) and 54 alpacas (Llama guanicoe f. pacos) during a spring health check. The concentrations of copper (Cu), zinc (Zn), and manganese (Mn) were determined by Flame Atomic Absorption Spectrometry and selenium (Se) by Hydride Generation Atomic Absorption Spectrometry. We found the following concentrations (mean ± standard deviation; mg/kg dry matter) in the llama hair: Cu 9.70 ± 4.69; Zn 145.20 ± 21.07; Mn 12.49 ± 10.14; Se 0.25 ± 0.14. In alpaca hair we found the following concentrations: Cu 10.22 ± 2.90; Zn 129.81 ± 19.01; Mn 12.67 ± 13.85; Se 0.48 ± 0.24. We found a significant difference between llamas and alpacas in Zn and Se concentrations in the hair. From all the evaluated factors we found that coat colour had the highest effect on Mn and Se concentration. Dark haired animals had significantly higher concentrations of these trace elements than other coloured groups. The evaluation of the concentration of trace elements in the hair of llamas has a potential to be used for the evaluation of long-term status of trace elements in the body; however, it is necessary to continue with experimental work in this area. Our findings can serve as a pilot study for further works in this field.

Optimization of a Digestion Method Using Diluted Acid in Bee Pollen Samples for Determination of Fe, Mn, and Zn by Flame Atomic Absorption Spectrometry

2016 ◽  
Vol 10 (3) ◽  
pp. 759-763 ◽  
Author(s):  
Jean S. Siqueira ◽  
João B. Pereira ◽  
Michelle S. Lemos ◽  
Heronides A. Dantas Filho ◽  
Kelly G. Fernandes Dantas
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Digestion Method ◽  
Bee Pollen ◽  
Flame Atomic Absorption
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