scholarly journals Geochemical mapping of urban soils in Athens, Greece - Preliminary results

2017 ◽  
Vol 47 (2) ◽  
pp. 901
Author(s):  
A. Argyraki ◽  
E. Kelepertzis ◽  
G. Fligos ◽  
E. Athanasiou ◽  
K. Gardiakos ◽  
...  
Keyword(s):  
Urban Soils ◽  
Scientific Discipline ◽  
Element Analysis ◽  
Aqua Regia ◽  
Flame Atomic Absorption Spectroscopy ◽  
Large Cities ◽  
Potentially Harmful Elements ◽  
Flame Atomic Absorption ◽  
Sampling Locations ◽  
Research Outcome

Urban geochemistry is a fast growing scientific discipline mainly because of the profound impact of large cities on the environment as well as the increase in the world’s urban population. The present study aims to produce the urban geochemical map of Athens, based on multi-element analysis of surface soils (0-10 cm) with emphasis in the spatial distribution of potentially harmful elements (PHEs). Soil sampling was based on a regular 1km x 1km grid, laid over the survey area covering more than 200 km2. Sampling locations within the grid cells were selected giving priority to playgrounds, schools and urban parks. The < 100 μm fraction of a total of 320 soil samples were analysed by Flame Atomic Absorption Spectroscopy for Pb, Zn, Cu, Cd, Cr, Ni, Co and Mn after aqua regia dissolution. Average content of Pb (62 mg/kg), Cu (36 mg/kg), Zn (91 mg/kg) and Mn (465 mg/kg) in soil was lower than reported concentrations from other European cities while Cr (74 mg/kg), Ni (89 mg/kg) and Co (16 mg/kg) were relatively enriched. Geochemical maps were plotted within GIS enabling recognition of spatial trends in elemental concentrations and potential sources of the elements. The research outcome will contribute to the evaluation of quality characteristics of urban soils in Athens and drive attention to areas of any environmental or health risks.

scholarly journals Human Activity in Antarctica: Effects on Metallic Trace Elements (MTEs) in Plants and Soils

Plants ◽  
2021 ◽  
Vol 10 (12) ◽  
pp. 2593
Author(s):  
Jaime Tapia ◽  
Marco Molina-Montenegro ◽  
Camila Sandoval ◽  
Natalia Rivas ◽  
Jessica Espinoza ◽  
...  
Keyword(s):  
Human Activity ◽  
Early Stage ◽  
Vascular Plant ◽  
Tissue Samples ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption ◽  
Sampling Locations ◽  
Metallic Trace Elements ◽  
Metallic Trace Element ◽  
The Antarctic

Colobanthus quitensis (Kunt) is one of the two vascular plant species present in Antarctica and develops under severe environmental conditions, being found in both pristine and human-threatened environments. We determined the Cd, Cr, Cu, Mn, Ni, Pb, and Zn levels in C. quitensis roots, leaves, and soils of origin using flame atomic absorption spectroscopy. In January 2017, we collected samples from four geographical zones on the longitudinal gradient along which C. quitensis is distributed, starting from Punta Arenas (PAR) at the extreme south of mainland Chile and moving southwards to the Antarctic territory from King George Island (KGI) to Hannah Point Peninsula (PHA) and finally Lagotellerie Island (LAT). We used certified reference material to validate the plant tissues and soil samples we collected. The highest concentrations of metals that we measured in the soils and in the C. quitensis roots and leaves were in samples we collected at the KGI station, the zone with the greatest human activity. The lowest concentrations we measured were at the LAT station, an island with little human intervention and scarce fauna. The mean concentrations of metals in the roots and leaves of C. quitensis followed a similar order at all sampling locations: Mn > Zn > Cu > Ni > Pb > Cr > Cd. In contrast, in soil, they followed the following order: Mn > Zn > Cu > Cr > Pb > Ni > Cd. The concentration levels obtained for the different metals in the soil and plants tissue samples in this region of Antarctica indicated that the area was non-polluted. However, the metallic trace element (MTE) concentrations may be at an early stage of contamination, as described in other areas of the Antarctic, being a new threat to this continent.

scholarly journals Serum levels of Cadmium, Calcium, Lead and Iron in Schizophrenic Patients

1970 ◽  
Vol 5 (1) ◽  
pp. 9-13 ◽  
Author(s):  
Pinky Karim ◽  
Md. Iqbal Hossain ◽  
AFM Nazmus Sadat ◽  
Zabun Nahar ◽  
Md. Khalid Hossain ◽  
...  
Keyword(s):  
Trace Elements ◽  
Serum Concentration ◽  
Prognostic Significance ◽  
Serum Levels ◽  
Schizophrenic Disorder ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption ◽  
Schizophrenic Patients ◽  
Calcium Lead ◽  
Exact Correlation

The serum concentration of cadmium (Cd), lead (Pb), calcium (Ca) and iron (Fe) in 30 schizophrenic patients and 30 normal healthy subjects were analyzed by flame atomic absorption spectroscopy. The concentrations of Cd, Pb and Ca in schizophrenic disorder patients was not increased significantly (P > 0.05) compared to that of the cohort controls. But the concentration of Fe in schizophrenic patients was significantly different from that of the cohort control (p < 0.000). The change in serum concentration of different trace elements may have some prognostic significance for the diagnosis of schizophrenic disorder. However further work is suggested to examine the exact correlation between trace elements level and the degree of disorder in schizophrenic patients. Key words: Schizophrenic patients, trace elements, clinical significance Dhaka Univ. J. Pharm. Sci. Vol.5(1-2) 2006 The full text is of this article is available at the Dhaka Univ. J. Pharm. Sci. website

scholarly journals Association of serum zinc and vitamin E levels with Acne vulgarisin Bangladeshi acne patients

2021 ◽  
Vol 45 (1) ◽  
pp. 49-58
Author(s):  
Tania Sultana ◽  
Aklima Akter ◽  
Fatima Tuz Zohra ◽  
Md Quddusur Rahman ◽  
Yearul Kabir
Keyword(s):  
Vitamin E ◽  
Serum Vitamin ◽  
Serum Zinc ◽  
Zinc Level ◽  
Serum Zinc Level ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption ◽  
Healthy Control ◽  
Male Patients ◽  
Acne Treatment

The serum level of zinc and vitamin E were measured to understand the association of various nutrients on acne pathogenesis. Both zinc and vitamin E are antioxidants used as a supplement in acne treatment. However, their effect and status in acne patients are not fully understood. This study included 48 acne patients and 48 sex- and age-matched healthy controls. The zinc and vitamin E concentration was measured in the serum by flame atomic absorption spectroscopy (AAS) and HPLC methods. Compared to the healthy control, a significant deficiency of serum vitamin E level in acne patients (p<0.001) was found, although the patients were not deficient in serum zinc level (p=0.22). In addition, female acne patients had a slightly lower zinc level than male patients (p=0.06). The low serum vitamin E level suggests that supplementation of vitamin E might be helpful in acne treatment. However, further studies are required to understand the dose and mechanism of vitamin E supplements in acne treatment. J. Bangladesh Acad. Sci. 45(1); 49-58: June 2021

scholarly journals Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods

2011 ◽  
Vol 8 (1) ◽  
pp. 263-267
Author(s):  
Baghdad Science Journal
Keyword(s):  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flameless Atomic Absorption ◽  
Flame Atomic Absorption ◽  
Flameless Atomic Absorption Spectroscopy ◽  
Low Concentrations ◽  
Wet Ashing ◽  
High Concentrations

Determination and evaluation of principal minerals in Negella sativa by atomic absorption technical methods were showed, using wet ashing method. This work was done on Negella sativa because of wide using of this plant in many formulations ( in food or medicine ).two types of atomic absorptions were used : first, flame atomic absorption spectroscopy, for minerals of high concentrations such as, Na, Mg, K, Fe, Ca, Li, Ni, Zn, Mn, Cu. Second, flameless atomic absorption spectroscopy, for minerals of low concentrations such as, Al, Si, V, B, Pb, Co, Cd, Cr ,Si, Hg, Sn .The results showed the existence of many minerals in Negella sativa useful to human sanity with acceptable dietary allowance. On other side, the presence of harmful minerals to human sanity(Pb, Cd, Hg ) were negligible.

Determination of Cadmium, Copper, and Lead in Sodium Chloride Food Salts by Flame Atomic Absorption Spectroscopy

1986 ◽  
Vol 69 (5) ◽  
pp. 871-873
Author(s):  
M Jesus Alvarez de Eulate ◽  
Rosa Montoro ◽  
Nieves Ybañez ◽  
Miguel De La Guardia
Keyword(s):  
Sodium Chloride ◽  
Atomic Absorption ◽  
Absorption Spectroscopy ◽  
Atomic Absorption Spectroscopy ◽  
Pyrrolidine Dithiocarbamate ◽  
Flame Atomic Absorption Spectroscopy ◽  
Flame Atomic Absorption ◽  
Coefficients Of Variation ◽  
Ammonium Pyrrolidine Dithiocarbamate

Abstract A method for determination of Cd, Cu, and Pb in sodium chloride food salt samples has been developed. It consists of extraction in 4- methj 1-2-pentanonc of the complexes formed with ammonium pyrrolidine dithiocarbamate and further analysis of the extracts by flame atomic absorption spectroscopy. Detection limits in ng/g salt were 0.2 for Cd, 0.7 for Cu, and 10.0 for Pb. The coefficients of variation of 12 independent analyses were 13% for Cd (at a level of 0.4 ppb), 18% for Cu (1.6 ppb), and 5% for Pb (40 ppb). The recoveries were 100 ± 0% for Cd, 115 ± 14% for Cu, and 100 ± 13% for Pb.

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