ICP-AES Determination of Mineral Elements in Five Edible Seeds after Microwave Assisted Digestion

2014 ◽  
Vol 881-883 ◽  
pp. 827-830
Author(s):  
Ying Wang ◽  
Qin Chao Ma ◽  
Hao Nan Xu ◽  
Kun Feng ◽  
Yan Tang
Keyword(s):  
Mineral Elements ◽  
Sunflower Seeds ◽  
Acid Digestion ◽  
Microwave Assisted ◽  
Relative Standard ◽  
Edible Seeds ◽  
Pumpkin Seeds ◽  
Melon Seeds ◽  
Microwave Assisted Digestion

The concentrations of 12 elements (Ca, P, K, Na, Mg, Fe, Se, Mn, Zn, Sn, Cu and Al) were determined in raw and roasted pumpkin seeds by ICP-AES following microwave-assisted acid digestion. The accuracy of the method determined by spiking experiments was very good (recoveries 95.48103.2%) and the limits of detection of elements of interest were from 0.1 up to 17.4μg g-1, the relative standard deviations were less than 3.52%. Compared with watermelon seeds, winter melon seeds, sunflower seeds and hanging melon seeds, the results showed the five kinds of roasted melon seeds are all rich in mineral elements.

scholarly journals Simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation process by GFAAS

2006 ◽  
Vol 31 (2) ◽  
pp. 7-12 ◽  
Author(s):  
V. R. Amorim Filho ◽  
W. L. Polito ◽  
S. R. Oliveira ◽  
G. P. G. Freschi ◽  
J. A. Gomes Neto
Keyword(s):  
Simultaneous Determination ◽  
Sugar Cane ◽  
Fermentation Process ◽  
Chemical Modifier ◽  
Acid Digestion ◽  
Microwave Assisted ◽  
Relative Standard ◽  
Integrated Platform ◽  
Characteristic Mass

A method has been developed for the simultaneous determination of Cd and Pb in antibiotics used in sugar-cane fermentation by GFAAS. The integrated platform of transversely heated graphite atomizer was treated with tungsten to form a coating of tungsten carbide. Six samples of commercial solid antibiotics were analyzed by injecting 20 µL of digested samples into the pretreated graphite platform with co-injection of 5 µL of 1000 mg L-1 Pd as chemical modifier. Samples were mineralized in a closed-vessel microwave-assisted acid-digestion system using nitric acid plus hydrogen peroxide. The pyrolysis and atomization temperatures of the heating program of the atomizer were selected as 600°C and 2200°C, respectively. The calculated characteristic mass for Cd and Pb was 1.6 pg and 42 pg, respectively. Limits of detection (LOD) based on integrated absorbance were 0.02 µg L-1 Cd and 0.7 µg L-1 Pb and the relative standard deviations (n = 10) for Cd and Pb were 5.7% and 8.0%, respectively. The recoveries of Cd and Pb added to the digested samples varied from 91% to 125% (Cd) and 80% to 112% (Pb).

Comparison of methods for inorganic trace element analysis in croatian olive oils

2008 ◽  
Vol 56 (1) ◽  
pp. 33-40 ◽  
Author(s):  
I. Juranović Ćindrić ◽  
M. Zeiner ◽  
I. Steffan
Keyword(s):  
Trace Element Analysis ◽  
Comparison Of Methods ◽  
Closed Vessel ◽  
Digestion Method ◽  
Element Analysis ◽  
Microwave Assisted ◽  
Olive Oils ◽  
Relative Standard ◽  
Microwave Assisted Digestion

The aim of the present study was a comparison of the analytical methods optimized for the determination of trace elements in olive oils as a basis for further investigations, such as adulteration detection or geographical characterization.Different types of sample preparation procedures prior to ICP-AES and GFAAS determinations were investigated: both open and closed vessel digestion in a steel bomb, as well as microwave-assisted digestion using a closed system, which was selected for further investigations. Recoveries for all elements in olive oil were > 95%. Good reproducibility (up to 10% RSD) was achieved for the measurements of the elements analysed. The sensitivity of the ICP-AES technique was sufficient for the determination of Ca, Fe, Mg and Zn (relative standard deviation approx. 2%). Furthermore, the proposed digestion method allowed the GFAAS determination of Al, Co, Cu, K and Ni in the concentration range of 0.1 to 1.5 μg/g, with relative standard deviations of approximately 3 to 10% for all samples.

ICP-AES Determination of Elements in Elsholtzia rugulosa Hemsl. after Microwave Assisted Digestion

2014 ◽  
Vol 543-547 ◽  
pp. 1136-1139
Author(s):  
Hong Bo Han ◽  
Yi Diao ◽  
Hui Ping Wei ◽  
Shu Quan Wan ◽  
Da Fen Zhang
Keyword(s):  
Detection Limits ◽  
Recovery Rates ◽  
Microwave Assisted ◽  
Relative Standard ◽  
Standard Deviations ◽  
Microwave Assisted Digestion

In this paper, the contents of these elements including Cu, Fe, Mn, Zn, Al, Cd, Pb, Ti and As were determined by ICP-AES technique, which elements originated from E. rugulosa from different places. Detection limits ranged 0.0029 ug/ml-1 and 0.079 ug/ml-1, the relative standard deviations for all these elements were lower than 2%, and recovery rates ranged 93% and 105.8%. The results showed that there were rich elements in E. rugulosa from different places; contents of Fe and Al were highest; contents of Mn, Zn and Ti were moderately high; and contents of Cu, As, Cd and Pb were lowest. Finally, concentrations of elements within E. rugulosa from different places were different, which may have some relations with the environment where it grew. As a result, the determining method which elements of E. Rugulosa are determined by ICP-AES is rapid, accurate and convenient.

scholarly journals Seasonal Variation in Aflatoxin Levels in Edible Seeds, Estimation of Its Dietary Intake and Vitamin E Levels in Southern Areas of Punjab, Pakistan

2020 ◽  
Vol 17 (23) ◽  
pp. 8964
Author(s):  
Ahmad Faizal Abdull Razis ◽  
Muhammed Muzammel Shehzad ◽  
Sunusi Usman ◽  
Nada Basheir Ali ◽  
Shahzad Zafar Iqbal ◽  
...  
Keyword(s):  
Vitamin E ◽  
Dietary Intake ◽  
Winter Season ◽  
Summer Season ◽  
Total Tocopherol ◽  
Average Amount ◽  
Significant Difference ◽  
Edible Seeds ◽  
Pumpkin Seeds ◽  
Melon Seeds

A total of 779 samples of edible nuts (melon seeds, watermelon seeds, pumpkin seeds, and cantaloupe seeds) from Southern Punjab (Pakistan), were collected during the summer and the winter seasons. The natural occurrence of aflatoxins (AFs) and vitamin E (tocopherols) levels were investigated using HPLC. The results have shown that 180 (43.4%) of samples from the winter season and 122 (33.4%) samples from the summer season were found positive for AFs. Elevated average levels of total AFs (20.9 ± 3.10 μg/kg, dry weight) were observed in watermelon seeds without shell, and the lowest average amount (15.9 ± 3.60 μg/kg) were documented in melon seeds without shell samples from the winter season. An elevated average amount of total AFs 17.3 ± 1.50 μg/kg was found in pumpkin seeds available without a shell. The results have documented a significant difference in total AFs levels in edible seeds available with shells versus without shells (α = 0.05 & 0.01). The highest dietary intake of 6.30 μg/kg/day was found in female individuals from consuming pumpkin seeds (without shell) in the winter season. A value of 3.00 μg/kg/day was found in pumpkin seed without shell in the summer season in female individuals. The highest total tocopherol levels were 22.2 ± 7.70 ng/100 g in pumpkin seeds samples from the winter season and 14.5 ± 5.50 mg/100 g in melon seed samples from the summer season. The variation of total tocopherol levels in edible seeds among the winter and summer seasons showed a significant difference (p ≤ 0.0054), except watermelon seeds samples with non-significant differences (p ≥ 0.183).

scholarly journals Pressurized Liquid Extraction and Microwave-Assisted Extraction in the Determination of Organochlorine Pesticides in Fish Muscle Samples

2008 ◽  
Vol 91 (1) ◽  
pp. 174-180 ◽  
Author(s):  
Mercedes Barriada-Pereira ◽  
Iván Iglesias-García ◽  
María J Gonzlez-Castro ◽  
Soledad Muniategui-Lorenzo ◽  
Purificación López-Maha ◽  
...  
Keyword(s):  
Organochlorine Pesticides ◽  
Fish Muscle ◽  
Extraction Methods ◽  
Liquid Extraction ◽  
Pressurized Liquid Extraction ◽  
Microwave Assisted Extraction ◽  
Microwave Assisted ◽  
Assisted Extraction ◽  
Relative Standard

Abstract This paper describes a comparative study of 2 extraction methods, pressurized liquid extraction (PLE) and microwave-assisted extraction (MAE), for the determination of organochlorine pesticides (OCPs) in fish muscle samples. In both cases, samples were extracted with hexaneacetone (50 + 50), and the extracts were purified by solid-phase extraction using a carbon cartridge as the adsorbent. Pesticides were eluted with hexaneethyl acetate (80 + 20) and determined by gas chromatography with electron-capture detection. Both methods demonstrated good linearity over the range studied (0.0050.100 g/mL). Detection limits ranged from 0.029 to 0.295 mg/kg for PLE and from 0.003 to 0.054 mg/kg for MAE. For most of the pesticides, analytical recoveries with both methods were between 80 and 120, and the relative standard deviations were <10. The proposed methods were shown to be powerful techniques for the extraction of OCPs from fish muscle samples. Although good recovery rates were obtained with both extraction methods, MAE provided advantages with regard to sample handling, cost, analysis time, and solvent consumption. Acceptable validation parameters were obtained although MAE was shown to be more sensitive than PLE.

scholarly journals Determination of Platinum in Wine by Graphite Furnace Atomic Absorption Spectrometry

1997 ◽  
Vol 80 (1) ◽  
pp. 57-62 ◽  
Author(s):  
Carmen Cabrera-Vique ◽  
Pierra-Louis Teissedre ◽  
Marie-Thérèse Cabanis ◽  
Jean-Claude Cabanis
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Graphite Furnace ◽  
Standard Addition ◽  
Absorption Spectrometry ◽  
Acid Digestion ◽  
White Wines ◽  
Relative Standard ◽  
Graphite Furnace Atomic Absorption

Abstract A method based on graphite furnace atomic absorption spectrometry (GFAAS) was developed for determining platinum in wine. Wine samples were prepared by microwave acid digestion or dry mineralization. The method of standard addition was used for Pt determination in untreated wine samples and mineralized samples. Analyte modifiers and furnace conditions were optimized. Effects of cations (Mg2+, Ca2+, K+, Na+, and NH|) and anions (PO43, SO42) were tested separately and in combination. Analytical characteristics of the method were optimized for analyte recovery and signal enhancement. Recoveries ranged from 92.5 to 102%, and precision reproducibility relative standard deviation varied from 7.5 to 10%. Red, rosé, and white wines from France were analyzed. Platinum levels found in most wines were very low (<10 μg/L).

Study of Material Properties for Microwave Assisted Digestion of Fallopia Multiflora for Multielement Analysis by ICP-AES

2014 ◽  
Vol 978 ◽  
pp. 15-18
Author(s):  
Hong Bo Han ◽  
Yi Zhong ◽  
Yi Diao ◽  
Jian Mei Deng ◽  
Min Jie Li
Keyword(s):  
Material Properties ◽  
Detection Limits ◽  
Multielement Analysis ◽  
Metallic Elements ◽  
Recovery Rates ◽  
Microwave Assisted ◽  
Relative Standard ◽  
Standard Deviations ◽  
Environment Condition ◽  
Microwave Assisted Digestion

In this work, the contents of all elements including Cu, Fe, Zn, Al, Mn, Cd, Pb, Ti and As were tested by ICP-AES technique, which elements root in Fallopia multiflora from different place such as Renhe county, Miyi county, Qianjiang county and so on. Detection limits ranged 0.0021ug/ml-1 and 0.076ug/ml-1, the relative standard deviations for all these elements were lower than 2%, and recovery rates ranged 95.52% and 107.2%. The consequence showed that there were many metallic elements in Fallopia multiflora from different places; contents of Fe and Al were highest in Renhe county’s sample specially; contents of Mn, Cu, Zn and Ti were moderately high in Yanbian county specially; and contents of As, Cd and Pb were lowest in Qianjiang county. concentrations of elements within Fallopia multiflorafrom different places were different, which may have some relations with the environment where Fallopia multiflora grew. So ,its necessary to monitor the environment condition of plant surronding.

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