scholarly journals Trace elements in soils of oases of Enderby Land (on an example of Vecherny oasis)

2018 ◽  
Vol 8 (2) ◽  
pp. 162-177 ◽  
Author(s):  
Tamara Kukharchyk ◽  
Sergey Kakareka ◽  
Yury Giginyak
Keyword(s):  
Trace Elements ◽  
Spectral Analysis ◽  
Bottom Sediments ◽  
Soil Cover ◽  
Soil Samples ◽  
Background Site ◽  
Sources Of Pollution ◽  
Aas Method ◽  
Migration Pathways

The content of trace elements in the soils of the Vecherny Oasis (Enderby Land, East Antarctica), where the construction of the Belarusian Antarctic Station started in December 2015, is considered. The results of the research are based on data collected during four Belarusian Antarctic expeditions in the period from 2011 to 2017, and analytical testing of soil samples taken from impacted and non-impacted sites. A total of 22 soil samples were analyzed for the content of trace elements; to compare the levels of accumulation and possible migration pathways, 7 samples of bottom sediments were also analyzed. Determination of trace elements was carried out using the AAS method (Cd, Cr, Cu, Pb, Ni, Zn, Fe, Mn) and emission spectral analysis (about 40 elements). The average values and range of concentrations of trace elements in soils and bottom sediments of the oasis are presented. The possible dependence of the trace elements content on the location positions in the landscape and on the sources of impact is discussed. It is shown, that the variability of metals content in soil profile for background site is low. In comparison with other oases of Antarctica no hotspots have been revealed and no significant areas of soil contamination have been identified yet, which is largely due to the fragmentation of the soil cover and lack of significant sources of pollution.

Separation of Lead, Cadmium, and Iron in Analyses of Soil Samples

1995 ◽  
Vol 60 (6) ◽  
pp. 938-949 ◽  
Author(s):  
Ladislav Svoboda ◽  
Tomáš Šafařík ◽  
Uwe Schmidt
Keyword(s):  
Hydrochloric Acid ◽  
Soil Extract ◽  
Soil Samples ◽  
Hydrochloric Acid Concentration ◽  
Chloride Complexes ◽  
Lead And Cadmium ◽  
Selective Detector ◽  
Aas Method ◽  
Basic Anion

The conditions of sorption of chloride complexes of Pb2+, Cd2+, Fe2+, and Fe3+ ions from media of hydrochloric acid have been studied with a strongly basic anion exchanger - Ostion LG AT. The experiments used an exchanger microcolumn connected with atomic absorption spectrometer as a selective detector of metal ions. From the relation found between retention of the ions studied and hydrochloric acid concentration, conditions of separation have been suggested and used for separations of small amounts of lead and cadmium from many times higher amounts of iron and aluminium in soil extract before determination of both the foreign metals by means of AAS method. The yield of separation exceeded 95%.

Complex of equipment «Clean workplace» for sample preparation during trace elements analysis: a new development of the «ANALIT «company

2018 ◽  
Vol 84 (10) ◽  
pp. 20-22
Author(s):  
D. A. Korkina ◽  
N. N. Delyatinchuk ◽  
I. L. Grinshtein ◽  
A. I. Kuzin
Keyword(s):  
Trace Elements ◽  
Spectral Analysis ◽  
Sample Preparation ◽  
Systematic Errors ◽  
Wide Spread ◽  
Sources Of Pollution ◽  
New Development ◽  
Trace Elements Analysis ◽  
Sources Of Contamination

Most of the errors in determining the trace contents of the elements are attributed to contamination at the stages of sample preparation and preparation of calibration solutions. One of the main sources of contamination is the laboratory air containing detectable impurities in the form of dust and aerosols. Reagents, dishes, dispensers and chemist himself may also act as sources of pollution. Background contents of the elements in a laboratory can be rather significant and lead to serious accidental and systematic errors, especially for wide-spread elements: Al, Si, Ca, Mg, Na, Fe, Zn, Cu, P, etc. A new development of the ANALIT company «Clean workplace» intended for sample preparation for trace spectral analysis is designed to solve the aforementioned problems.

Determination of Some Trace Elements in Food and Soil Samples by Atomic Absorption Spectrometry After Coprecipitation with Holmium Hydroxide

2012 ◽  
Vol 95 (3) ◽  
pp. 892-896 ◽  
Author(s):  
Sibel Saracoglu ◽  
Mustafa Soylak ◽  
Dilek Çabuk ◽  
Zeynep Topalak ◽  
Yasemin Karagozlu
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Certified Reference Materials ◽  
Absorption Spectrometry ◽  
Sample Volume ◽  
Soil Samples ◽  
Separation And Preconcentration ◽  
Loam Soil

Abstract The determination of trace elements in food and soil samples by atomic absorption spectrometry was investigated. A coprecipitation procedure with holmium hydroxide was used for separation- preconcentration of trace elements. Trace amounts of copper(II), manganese(II), cobalt(II), nickel(II), chromium(III), iron(III), cadmium(II), and lead(II) ions were coprecipitated with holmium hydroxide in 2.0 M NaOH medium. The optimum conditions for the coprecipitation process were investigated for several commonly tested experimental parameters, such as amount of coprecipitant, effect of standing time, centrifugation rate and time, and sample volume. The precision, based on replicate analysis, was lower than 10% for the analytes. In order to verify the accuracy of the method, the certified reference materials BCR 141 R calcareous loam soil and CRM 025-050 soil were analyzed. The procedure was successfully applied for separation and preconcentration of the investigated ions in various food and soil samples. An amount of the solid samples was decomposed with 15 mL concentrated hydrochloric acid–concentrated nitric acid (3 + 1). The preconcentration procedure was then applied to the final solutions. The concentration of trace elements in samples was determined by atomic absorption spectrometry.

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