Comparison of inductively coupled plasma optical emission spectrometry, energy dispersive X-ray fluorescence spectrometry and laser ablation inductively coupled plasma mass spectrometry in the elemental analysis of agricultural soils

Abstract

A silica sol-gel technique was applied to the preparation of pellets of agricultural soils for determination of trace elements by laser ablation inductively coupled plasma mass spectrometry (LA-ICP-MS). For the purpose of evaluation of feasibility of the LA-ICP-MS technique for quantitative determination, elemental contents in twenty two spiked archive agricultural soils and three CRMs (GBW07405, GBW07406, and GBW07407) were determined by independent analytical techniques, namely by inductively coupled plasma optical emission spectrometry with pneumatic nebulization (PN-ICP-OES) after total decomposition with a mixture of acids, and by energy dispersive X-ray fluorescence (ED-XRF) spectrometry analysis of pellets prepared with a wax binder. Ablation was carried out with a Nd:YAG laser at 213 nm. Possible matrix interferences associated with ablation of the multiphase soil material were anticipated and therefore, the sequential extraction procedure was employed for fractionation analysis to determine elemental concentrations, in particular soil constituents, for explaining potential deviations of LA-ICP-MS analyses. Methods were compared based on the determination of ordinarily monitored trace elements Cu, Cr, Ni, Pb and Zn in archive soils and certified reference materials. The PN-ICP-OES, ED-XRF and LA-ICP-MS methods were compared by means of linear regression analysis to search for a possible systematic proportional or constant error. Besides the ordinary least-squares linear regression method, also weighted least squares, orthogonal, Deming, maximum likelihood and Passing-Bablok regressions were employed. The Bland-Altman plot and score plot based on principal component analysis (PCA) were used for visual comparison.

WITHDRAWN: Ultrafast Picosecond Laser Spectroscopy and ICP-OES Assisted Calibration-free of Toxic Metal Concentrations in Contaminated Agricultural Soils

“…Solution-based techniques encompass methodologies that employ liquid solvents and potent acids to extract, segregate, or quantify the attributes of matter contingent upon their interaction with electromagnetic radiation. Within this category, notable methodologies include Atomic Absorption Spectroscopy (AAS), Inductively Coupled Plasma Mass Spectrometry (ICP-MS), and Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) (Janotková et al 2013). Inductively Coupled Plasma Optical Emission Spectroscopy (ICP-OES) represents a method deployed in our study for the purpose of its merits.…”

Weighted Linear Regression Improves Accuracy of Quantitative Elemental Bioimaging by Means of LA-ICP-MS

“…This is in line with reports in literature about ICP-MS data being heteroscedastic in most cases. 9,14,30 It has been discussed as a partially intrinsic problem of count based data, whose distribution can be reasonably described by a Poisson distribution. 14,27 This directly implies a functional dependency of the standard deviation on the average count and therefore rules out a constant variance throughout the entire concentration range.…”

Determination of metals in Brazilian soils by inductively coupled plasma mass spectrometry

“…Thus, for the digestion of the complete sample, procedures based on addition of mineral acids mixtures are applied. Moreover, the soil samples have a complex matrix with (Janotková et al 2013;Wang et al 2014). Besides the soil matrix, the digested soil sample solutions have a high amount of acid requiring an appropriate dilution before ICP-MS analysis.…”