scholarly journals A Comparison of Reproducibility of Inductively Coupled Spectrometric Techniques in Soil Metal Analyses

2019 ◽  
Vol 12 ◽  
pp. 117862211986900 ◽  
Author(s):  
Joan Nyika ◽  
Ednah Onyari ◽  
Megersa Olumana Dinka ◽  
Shivani Bhardwaj Mishra
Keyword(s):  
Contaminated Soils ◽  
Inductively Coupled Plasma ◽  
Optical Emission ◽  
Major Elements ◽  
Emission Spectrometry ◽  
Sample Collection ◽  
Test Analysis ◽  
Inductively Coupled ◽  
Carry Over ◽  
Insoluble Compounds

Precise estimation of metals in samples remains a challenge as a result of analytical biases and errors, which occur at sample collection, preparation, and measurement stages. A poor understanding of the nature and occurrence of these errors further aggravates this challenge. This study aimed at comparing the effectiveness of inductively coupled plasma (ICP) mass spectrometry (MS) and optical emission spectrometry (OES) techniques in quantifying metals from contaminated soils of Roundhill landfill vicinity. Using statistical tools, the study evaluated biases of the 2 methods. High coefficients of variation were realized for V, Cr, and Pb concentrations varied at various sampling sites. Concentrations of elements obtained using the 2 methods had no significant differences using t-test analysis. Definitive agreement for the 2 methods was observed for V, Cr, Co, Ni, Cu, Zn, Sr, and Pb concentrations, whereas the concentrations of Mg, Ca, Ti, Mn, and Fe showed some deviations in their regression lines. Spectral, systematic, memory, and carry over errors could be attributable to these deviations. The errors promote chelation and adsorption of ions in samples to form insoluble compounds that cannot be quantified. Overall, ICP-MS had greater sensitivity than ICP-OES in trace elements analysis compared with major elements.

scholarly journals Optimising Sample Preparation and Calibrations in EDXRF for Quantitative Soil Analysis

Agronomy ◽  
2020 ◽  
Vol 10 (9) ◽  
pp. 1309
Author(s):  
Maame E. T. Croffie ◽  
Paul N. Williams ◽  
Owen Fenton ◽  
Anna Fenelon ◽  
Konrad Metzger ◽  
...  
Keyword(s):  
Sample Preparation ◽  
Soil Texture ◽  
Contaminated Soils ◽  
Inductively Coupled Plasma ◽  
Soil Analysis ◽  
Optical Emission ◽  
Emission Spectrometry ◽  
Icp Oes ◽  
Fundamental Parameters ◽  
Inductively Coupled

Energy-dispersive X-ray fluorescence spectrometry (EDXRF) is a rapid and inexpensive method for soil analysis; however, analytical results are influenced by particle size effects and spectral interferences. The objective of this study was to optimise sample preparation and calibrations to improve the accuracy of EDXRF for soil tests. Methods of sample preparation were compared by calculating the recoveries of 13 elements in four International Soil-Analytical Exchange (ISE) standards prepared as loose powder (LP), pressed pellet (PP), and pressed pellet with wax binder (PPB). A matching library (ML) was created and evaluated against the fundamental parameters (FP) calibration using 20 ISE standards. Additionally, EDXRF results of 41 tillage soils were compared with Inductively coupled plasma optical emission spectrometry (ICP-OES) results. The PPB had most recoveries within the acceptable range of 80–120%; conversely, PP yielded the poorest element recoveries. For the calibration, the ML provided better recoveries of Ni, Pb, Cu, Mg, S, P, and Cr; however, for Zn, and Mn, it had the opposite effect. Furthermore, EDXRF results compared with ICP-OES separated by soil texture class for Al, K, Mn, and Fe. In conclusion, the EDXRF is suitable for quantifying both trace elements and macronutrients in contaminated soils and has the potential to provide screening or prediction of soil texture in agriculture.

scholarly journals Determination of Major-to-Trace Minerals and Polyphenols in Different Apple Cultivars

2014 ◽  
Vol 42 (2) ◽  
pp. 523-529 ◽  
Author(s):  
Doina Adina TODEA ◽  
Oana CADAR ◽  
Dorina SIMEDRU ◽  
Cecilia ROMAN ◽  
Claudiu TANASELIA ◽  
...  
Keyword(s):  
Trace Elements ◽  
Inductively Coupled Plasma ◽  
High Performance ◽  
Optical Emission ◽  
Major Elements ◽  
Emission Spectrometry ◽  
Climate Conditions ◽  
Inductively Coupled ◽  
Minor Elements ◽  
Apple Cultivars

The aim of this study was to investigate the concentration level of some major-to-trace elements and toxic minerals and polyphenols (catechin, epicatechin and quercetin) in fruits belonging to different apple cultivars (‘Auriu de Cluj’, ‘Florina’, ‘Generos’, ‘Golden Delicious’, ‘Prima’, ‘Productiv de Cluj’ and ‘Starkrimson’), under specific climate conditions to northwestern Romania. The apple minerals were determined by the inductively coupled plasma mass spectrometry (ICP-MS) and inductively coupled plasma optical emission spectrometry (ICP-OES) after a preliminary, microwave-assisted, acid digestion. The polyphenols were determined by high performance liquid chromatography (HPLC) with MS/MS detection. According to the obtained results, the edible part of the apple contains many minerals with high relative nutritional value (RNV). The major minerals (Na, K, Ca, Mg and P), minor elements (Cu, Fe, Mn, Sr and Zn) and toxic trace elements (Cd, Cr and Pb) were comparatively identified and quantified. It was found that K (31976 mg/kg) was predominant among the major elements, while Fe (3.68 mg/kg) and Cu (3.57 mg/kg) were comparable. The toxic trace metals (Cd, Cr and Pb) were below the limits of detection (0.01, 0.10 and 0.01 mg/kg, respectively) and did not determine any health risk to consumers. The main polyphenols composition (catechin, epicathechin, quercetin) differs slightly among different cultivars. In ‘Idared’ and ‘Jonathan’ cultivars, the investigated polyphenols are in higher quantities comparing to the others. In all investigated apple cultivars, quercetin was proved to be the major polyphenol, followed by epicathechin and catechin. These results suggest that, regarding only the investigated polyphenols, ‘Idared’ and ‘Jonathan’ cultivars have the highest antioxidant character in all investigated genotypes.

scholarly journals Profile of Trace Elements in Selected Medicinal Plants Used for the Treatment of Diabetes in Eritrea

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Mussie Sium ◽  
Patrick Kareru ◽  
Joseph Keriko ◽  
Berhane Girmay ◽  
Ghebrehiwet Medhanie ◽  
...  
Keyword(s):  
Trace Elements ◽  
Inductively Coupled Plasma ◽  
Nigella Sativa ◽  
Optical Emission ◽  
Major Elements ◽  
Lepidium Sativum ◽  
Emission Spectrometry ◽  
Inductively Coupled ◽  
Flame Atomic Absorption ◽  
Plasma Optical Emission Spectrometry

This study was designed to investigate the profile of certain trace elements having therapeutic properties related to diabetes mellitus. The investigated plants wereAloe camperi,Meriandra dianthera,Lepidium sativum,Brassica nigra, and Nigella sativa. These plants are traditionally used in the management of diabetes in Eritrea. The elemental analysis was conducted using inductively coupled plasma optical emission spectrometry (ICP-OES) and flame atomic absorption spectroscopy (FAAS) techniques. The accuracy of the methods was verified using in-house reference materials (CRMs) and no significant differences were observed between the measured and certified values. The analysis displayed variable concentrations of the different trace elements including Zn, Cr, V, Mn, and Se in the plants. Moreover, the levels of major elements, such as Mg, Ca, K, Na, and Ba, and heavy metals, such as Fe, Cu, Ni, Co, As, and Pb, were determined and found to be in the permissible limit defined by WHO. Among the plants,Meriandra diantherashowed the highest levels of Mn, Cr, V, and other elements and the values were significantly different (P<0.05).

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