scholarly journals A Comparative Study Between Conventional ICP-OES and the Innovative PLS Model-Assisted ICP-OES for the Assay of Trace Elements

Author(s):  
Adel M Michael ◽  
Ahmed A Mohamed ◽  
Yousef A Abdelaziz ◽  
Nesma M Fahmy

Abstract Background Inductively coupled plasma is widely used for elemental analysis with the advantage of being eco-friendly since the discharge is free of contaminants. Objective A rapid, novel method was developed for the quantitation of trace elements using inductively coupled plasma with optical emission spectrometry.This method has the advantage of simultaneous calibration compared to the conventional method. Method The assay was carried out for iron, copper, zinc, and molybdenum using the linear regression model partial least-squares. Results The method was optimized and validated as per the International Conference on Harmonization guidelines, showing highly accurate and precise results. The linearity range was 0.25–4 ppm for all trace elements under investigation. The method was applied for the assay of the cited elements in non-chelated and amino acid chelated multi-mineral preparations in the Egyptian market with acceptable mean percent recovery. Conclusions In comparison with the official method by flame emission, statistical analysis showed no significant difference with Student’s t-test and F-values. Highlights Inductively coupled plasma is superior as all of the elements can be measured simultaneously. The method was found to have a high degree of specificity and can be easily applied in routine elemental analysis in laboratories.

2015 ◽  
Vol 30 (4) ◽  
pp. 936-940 ◽  
Author(s):  
Pao Li ◽  
Wensheng Cai ◽  
Xueguang Shao

With the help of standard signals, the signals of trace elements in overlapping ICP OES signals can be obtained by a non-negative immune algorithm and used for quantitative analysis.


2015 ◽  
Vol 7 (8) ◽  
pp. 3637-3644 ◽  
Author(s):  
Manuela Ruiz-de-Cenzano ◽  
Arancha Rochina-Marco ◽  
Jessica Ruiz ◽  
M. Luisa Cervera ◽  
Miguel de la Guardia

An inductively coupled plasma optical emission (ICP-OES) method was developed for the simultaneous determination of major, minor and trace elements in food.


2016 ◽  
Vol 76 (1) ◽  
pp. 194-204 ◽  
Author(s):  
E. Silva ◽  
Z. C. V. Viana ◽  
C. R. E. Onofre ◽  
M. G. A. Korn ◽  
V. L. C. S. Santos

Abstract In this study, concentrations of trace elements in tissues of shrimp species (Litopenaeus vannamei) from farming and zone natural coastal located in the northeastern Brazil were investigated. The elements determination was performed by optical emission spectrometry with inductively coupled plasma (ICP OES). The following ranges of concentrations in the tissues were obtained in µg g–1 dry weight: Al: 13.4-886.5, Cd: 0.93-1.80; Cu: 24.8-152; Fe: 3.2-410.9; Mn: 0.36-24.4; Se: 0.094-9.81 and Zn: 20.3-109.4. The shrimp muscle can be a good iron source (about 88.9 mg–1g dry weight). The distribution of Se concentration in tissues showed much variation between locations, and the concentration levels found in shrimp muscles of wild samples were high, where its levels in 67% of muscle and 50% of others tissues samples exceeded the ANVISA limit, indicating evidence of selenium bioaccumulation. Significant correlation was observed between the following pairs of elements: Fe-Zn (r= –0.70), Mn-Cu (r= –0.74), Se-Cu (r= –0.68), Se-Mn (r= 0.82) in the muscles; Fe-Al (r= 0.99), Mn-Al (r= 0.62), Mn-Fe (r= 0.62), Se-Al (r = 0.88), Se-Fe (r= 0.87), Se-Mn (r= 0.58) in the exoskeleton and Cu-Zn (r = 0.68), Al-Cu (r= 0.88), Fe-Cu (r= 0.95) and Fe-Al (r= 0.97) in the viscera.


2019 ◽  
Vol 73 (8) ◽  
pp. 927-935 ◽  
Author(s):  
Benjamin T. Manard ◽  
Shalina C. Metzger ◽  
C. Derrick Quarles ◽  
Kayron T. Rogers ◽  
Brian W. Ticknor ◽  
...  

Automated introduction platforms integrated with inductively coupled plasma optical emission spectroscopy (ICP-OES) systems are continuously being improved. Expanding on the introduction systems, a newly developed automated ion chromatography system was explored for performing rapid in-line separations coupled to ICP-OES for the detection of trace elements in uranium. Trace elements are separated from a uranium material and the analytes are directed into the ICP-OES for subsequent detection. Detection parameters such as exposure time frequency, wavelength selection, and settling times were explored to gain insight on optimal detection schemes for in-line trace elemental analysis. The methodology was applied in the analysis of a uranium oxide (U3O8) certified reference material, CRM-124. It was found here that the sensitivity and uncertainty of the technique are greatly affected by how the ICP-OES is employed to collect data. Overall it was determined that faster exposure replicates can provide greater peak resolution with higher fidelity measurements but are limited with respect to the total analysis time (i.e., limited in detection timely separations). Zeta scores, which combine accuracy and uncertainty of certified values and experimental values, were used to validate the ICP-OES modes of operation.


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