Lambrini Papadopoulou | Aristotle University of Thessaloniki (original) (raw)

Papers by Lambrini Papadopoulou

Dental Materials, Oct 1, 2008

The aim of the present study was to investigate the microstructural changes in three dental ceram... more The aim of the present study was to investigate the microstructural changes in three dental ceramics after their sintering according to manufacturers' instructions and to comparatively evaluate some of their physical, mechanical and biological properties. Methods. The analysis of the phases present in each material before and after sintering was performed with scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FTIR) and X-ray diffraction analysis (XRD). The thermal properties of ceramic specimens were evaluated with differential thermal and thermogravimetric analysis (TG-DTA). The mechanical properties evaluated were fracture toughness, Young's modulus and microhardness with the Vickers indentation method. MTT assay was used for cell proliferation assessment. One-way analysis of variance (ANOVA) with Bonferroni multiple comparisons tests was used to determine statistically significant differences (significance level of p < 0.05). Results. Results showed a remarkable variation among the three ceramic compositions of leucite content in the starting unheated ceramic powders ranging between 14 and 32 wt.% and in the respective sintered powders ranging between 15 and 41 wt.% The low fusing glass-ceramic and the high fusing leucite-based ceramic presented significantly higher fracture toughness (p < 0.001) and microhardness and lower modulus of elasticity (p < 0.05) compared to the low fusing feldspathic ceramic. The three ceramics were almost equivalent concerning their in vitro biological behavior. Significance. Variations in crystal structure, distribution and composition are related to differences concerning mechanical properties of dental ceramics.

International Journal of Molecular Sciences, Jan 8, 2021

This article is an open access article distributed under the terms and conditions of the Creative... more This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY

Bulletin of the Geological Society of Greece, 2021

The lithologies and structural features of the exposed rocks of the Serbo-Macedonian massif in th... more The lithologies and structural features of the exposed rocks of the Serbo-Macedonian massif in the Vertiskos and Kerdilion Mts. have been studied in detail by carrying out km-long cross-sections. Moreover, a new tectonostratigraphic architecture for the massif is proposed, based on the migmatization and anatexis that the rocks pertain, under which the specific exposed rocks have been placed into the Vertiskos and Kerdilion Units. The latter approach differs from the traditional view, which is based solely on the lithological difference between the units. In particular, in the Vertiskos Mt., mica schists, garnet-bearing two-mica gneisses, and predominantly two-mica gneisses, without a sign of anatexis and migmatization, overlie tectonically, biotite gneisses and layered amphibolite gneisses into which migmatization and anatexis takes place. The former constitute the Vertiskos Unit, whereas the latter have been grouped into the Kerdilion Unit, since they are of similar lithologies and...

Journal of Non-Crystalline Solids, 2018

Recent studies revealed that metallic ions have therapeutic effects on human bone metabolism and ... more Recent studies revealed that metallic ions have therapeutic effects on human bone metabolism and angiogenesis. Thus, in this study, a new magnesium-calcium-silicate glass powder, being doped with copper ions was synthesized through the sol-gel process; the material was termed as 60S7M2Cu. The glass was thermally treated at several temperatures up to 870°C in order to induce crystallization, which would potentially enhance its mechanical and/or biological properties. Structural and morphological characterization, thermal analysis and invitro apatite forming ability evaluation were performed by X-ray diffraction-XRD, Scanning Electron Microscopy-SEM coupled with Energy Dispersion Spectrometry-EDS, Thermogravimetric Analysis, as well as Fourier Transformed Infrared-FTIR Spectrometry. Moreover, the elemental release was recorded by Inductively Coupled Plasma Atomic Emission Spectroscopy ICP-AES. Experimental results showed that a crystalline hydroxyapatite phase was developed after 3 days in the simulated body fluid (SBF) followed, after 15 days, by the growth of a carbon hydroxyapatite layer, in both untreated glass as well as treated glass-ceramics nearly at all temperatures. At lower temperatures, namely 770 and 800°C, a whitlockite bioactive phase appeared after the immersion in SBF, while a wollastonite crystalline phase emerged when treated at 830 and 870°C without having a negative effect on its apatite forming ability. Copper ions releasing from the glass and glass-ceramics materials was proved to be slow and stable during the whole period of soaking. In this study copper containing glass and glassceramics, which present apatite forming ability and according to literature possess the capability to induce the release of therapeutic ions with osteogenic and angiogenic capacity, were synthesized. Eventually, after further investigations, this glass composition could be applied in bone tissue engineering, where bioactive materials able to induce simultaneously both osteogenesis and angiogenesis constitute a constant demand.

Operative Dentistry, 2019

SUMMARY Objective: This study evaluated the shear bond strength (SBS) of pretreated monolithic zi... more SUMMARY Objective: This study evaluated the shear bond strength (SBS) of pretreated monolithic zirconia surfaces bonded to human dentin following immediate dentin sealing (IDS) using two different self-adhesive resin luting agents. Methods and Materials: Sixty intact human third molars were collected, stored, sectioned appropriately, and molded according to ISO 29022:2013, resulting in 120 dentin specimens. Ceramic cylindrical specimens were fabricated using CAD/CAM technology and sintered as recommended (final bonding area A=2.56 mm2). Specimens were randomly assigned to eight groups (15≥n≥14) depending on dentin conditioning method (IDS or delayed dentin sealing [DDS]), zirconia surface pretreatment (airborne particle abrasion [APA] with 50 μm Al2O3 particles at 3 bar for 10 seconds or tribochemical silica coating [TBC] with 30 μm CoJet particles at 2.8 bar for 10 seconds), and adhesive luting agent type (Panavia F2.0 [PAN] or PermaCem Dual Smartmix [PER]). Bonded specimens were w...

Δελτίον της Ελληνικής Γεωλογικής Εταιρίας, 2013

Papikion Mt pluton which intrudes Kardamos Dome, consists of biotite (Bi), hornblende (Hbl) and b... more Papikion Mt pluton which intrudes Kardamos Dome, consists of biotite (Bi), hornblende (Hbl) and biotite-hornblende (Bi-Hbl) bearing rock types. In this work the relationship among the amphiboles of each Hbl-bearing rock type is studied. Moreover, their minimum crystallization pressure and temperature are estimated. The amphiboles of the Hbl granodiorite (GRD), the Bi-Hbl diorite (DR) and the Hbl diorite (DR) are classified mainly as magnesiohornblende and ferrohornblende and the amphiboles of the Bi-Hbl GRD as ferroedenite and hanstingsite. It is to note that some samples contain amphibole crystals showing a sieved texture with quartz. These sieved amphiboles have no chemical differences from the rest amphibole crystals. This texture can probably derive from the breakdown of mafic minerals of an assimilated xenolith such as pyroxenes and hornblende itself, leaving quartz. Using the Al-in-hornblende geobarometer and the plagioclase-hornblende geothermometer), minimum crystallization pressures from 4.6 to 5.2 kbar and temperatures from 700 to 740 °C were estimated for the Bi-Hbl GRD. The DR shows crystallization pressures ranging from 6.4 to 7.4 kbar and temperatures ranging from 620 to 700 °C. The Hbl GRD shows the lowest P-T values, thus an average crystallization pressure about 3 kbar and an average temperature about 600 °C were estimated.

Carpathian Journal of Earth and Environmental Sciences, Jun 30, 2023

Investigation of variations in the micro-texture and chemical composition of plagioclases (core t... more Investigation of variations in the micro-texture and chemical composition of plagioclases (core to rim) allows the sequencing of the magma chamber processes and helps interprete and associate textures to specific processes. In this contribution, the micro-textures and chemical zoning of the plagioclases, significant recorder of magma chamber processes, from the west of Torbat-e-Heydariyeh andesitic rocks (WTHAR) are considered to decipher the physical and chemical parameters of magma evolution. The rocks are cropped out in the northern branch of Neotethyan magmatic belt and considered as the products of Eocene magmatic activities of the Sabzevar zone (N-NE Iran). The rocks show vitrorphyric and vitroglomeroporphyric textures with main phenocrysts, plagioclase (andesine, labradorite, and bytownite), clinopyroxene (augite), orthopyroxene and magnetite scattered in a glassy matrix. The recognized micro-textures of the WTHA plagioclases can be divided into two categories: (i) growth- related textures in the form of coarse-sieved (CS), fine-sieved (FS), core sieved and intact margin (CSIM), core intact and sieved margin (CISM) and entirely sieved (ES) morphologies, oscillatory zoning (OZ), rounded zone corner (RZC) and resorption surfaces (RS) formed due to the changes in temperature, melt H2O content, pressure, composition of the melt, equilibrium at the crystal-melt interface and (ii) morphological textures such as glomerocrysts (GLO), synneusis (SY), swallow-tail (ST) crystals, broken crystals (BC), formed by the effect of dynamic behavior of the crystallizing magma (convection, degassing, etc.) and magmatic differentiation. Also, the occurrence of these changes can be related to the self-mixing process in the magma chamber. The self-mixing with recharge event can be the reason for the dynamic activities in the magma chamber.

Επιστημονική Επετηρίδα του Τμήματος Γεωλογίας (Α.Π.Θ.), 2010

Kharazmi Journal of Earth Sciences, 2018

دوت ۀ هيوت یدیئوتینارگ رد راورد 07 تسا هتفرگ رارق یرواخ زربلا نوز بونج رد ،ناغماد رتخاب بونج یرتم... more دوت ۀ هيوت یدیئوتینارگ رد راورد 07 تسا هتفرگ رارق یرواخ زربلا نوز بونج رد ،ناغماد رتخاب بونج یرتمولیک . نيا کیئوزوئلاپ یگنس یاهدحاو لخاد رد هدوت نيريز ( نوللا و نوگاز ،توراب یاهدنزاس ) هدرک ذوفن تسا . دهاوش ساسا رب گنس و یيارحص و تینوزنومزتراوک ،تینوزنوم زا هدوت نيا ،یراگن تسا هدش لیکشت تيرويدوزنوم . لماش هدوت یيایناک بیکرت زتراوک ،راپسدلف یلاکلآ ،زلاکويژلاپ ± تیتویب ± تسا لوبیفمآ . یناک تيریپ و تیناتیت ،تیتاپآ ،نکريز ،تیتنگم و یعرف یاه تيرلک و تیسلک ،تودیپا ،تیسيرس یناک دنتسه هيوناث یاه . لوبیفمآ گنس رد دوجوم یاه ا هدوت نيا یاه میسلک عون ز راد راشف مک دنتسه نيرذآ أشنم اب و دنلبنروهورف بیکرت اب . ب ه شور یریگراک امد یاه هب یجنسراشف یامد بیترت 737 607 جرد ۀ یتناس مک راشف و دارگ زا رت 2 دوت رد لوبیفمآ یياهن لداعت و لدابت فقوت یارب ار رابولیک ۀ هيوت یذوفن ناشن راورد یم یاج قمع اب هک دهد مک یریگ زا رت 0 تسا راگزاس هدوت رتمولیک . تفاب دوجو او رولبزير یاه ات سولاسرپیه یشنک باس سوولاس ( یریفونارگ ،کیفارگ ،یتیکمریم ،یتیترپ ) گنس رد ،نآ فارطا رد راکشآ یربمه ینوگرگد دوبن و هدوت یاه ناشن لااب ...

$Research paper thumbnail of Petrogenesis of Eocene Agios Gregorious Plutonic complex (Mt. Athos, Greece): interplay between magma mixing, assimilation and fractional crystallization$

Environmental Pollution, 2021

Children in urban environments are exposed to potential harmful elements (PHEs) through variable ... more Children in urban environments are exposed to potential harmful elements (PHEs) through variable exposure media. Playing activities in outdoor playgrounds have been considered of high concern due to children's exposure to sand-bound PHEs through unintentional or intentional sand ingestion. Furthermore, the affinity of magnetic particles with dust-bound PHEs in playgrounds has been reported. In this study, playground sands (PG sands) from public playgrounds in the city of Thessaloniki, N. Greece were sampled and the levels, the contamination degree, oral bioaccessibility and exposure assessment of PHEs were evaluated. In addition, low-cost and fast magnetic measurements (i.e. mass specific magnetic susceptibility, χlf) were explored as potential pollution and health risk proxies. Mineralogically, siliceous PG sands dominated, while morphologically angular magnetic particles and Fe-rich "spherules" of anthropogenic origin were revealed and verified by enhanced χlf values. The average total elemental contents exhibited a descending order of Mn > Ba > Cr > Zn > Ni > Pb > Cu > Co > As > Sn > Bi > Cd, however only Cd, Bi, Pb, Cr, As and Zn were presented anthropogenically enhanced. Notable increase on PHEs levels and finer sand fractions were observed with continuous sand use. Anthropogenically derived elements (i.e. Cd and Pb with high Igeo values) exhibited higher bioaccessible fractions in PG sands and considered easily soluble in gastric fluids through ingestion. However, increased risks were found for specific PHEs (especially Pb) only in a worst case exposure scenario of an intentional sand ingestion (pica disorder). Statistical analysis results revealed a linkage of anthropogenic components with sand-bound magnetic particles. Moreover, the recorded high affinity of Pb contents (in an enhanced magnetized sub-set of PG sands) and bioaccessible Cd fractions with χlf provide a preliminary indication on the successful applicability of low-cost and fast magnetic measurements in high impacted playground environments.

Bulletin of the Geological Society of Greece, 2017

Two kinds of clays (one white and one green) available in pharmacies and herbalist’s shops in the... more Two kinds of clays (one white and one green) available in pharmacies and herbalist’s shops in the Greek market have been studied for their concentrations in trace elements, namely As, Be, Cd, Cr, Hg, Ni, P, Pb, Sb, Se, Te, Tl and Zr. According to EC Regulation 1223/2009, the presence of the analyzed trace elements and their compounds, are prohibited in cosmetics. The most abundant trace elements of the white clay are P (330 ppm), Pb (220 ppm) and Zr (11 ppm), while for the green clay are P (1250 ppm), As (43 ppm), Cr (31 ppm), Pb (30 ppm) and Ni (23 ppm). Compared to the global shale average concentration of elements, Pb is enriched 11-times in the white clay and As is enriched 3-times in the green clay. The depleted trace elements of the white clay are As, Cd, Cr, Hg, Ni, P, Sb, Se, Te, Tl and Zr, while of the green one are Cr, Hg, Ni, Sb, Te, Tl and Zr. Concerning the morphological characteristics, differences were observed in the particle size and shape between the white and gree...

Journal of Geochemical Exploration, 2017

Torud-Ahmad Abad magmatic belt is located 175 km east and southeast of Shahrood in the northern p... more Torud-Ahmad Abad magmatic belt is located 175 km east and southeast of Shahrood in the northern part of the Central Iran Structural Zone and includes a thick sequence of Paleocene to middle Eocene volcanic and volcanosedimentary rocks. This magmatic belt was formed by numerous hypabyssal igneous adakitic domes constituting basaltic andesite, andesite, trachyandesite, dacite, trachydacite, and dacite. The investigated rocks are mainly composed of pyroxene, amphibole, and plagioclase, with minor biotite and opaque minerals. Mineral chemical analysis reveals that plagioclase composition varies from albite to labradorite, clinopyroxene varies from diopside to augite, and amphibole varies from Mg-hastingsite to Mg-hornblende. Amphibole geothermobarometry suggests crystallization temperatures of 850-1050°C, at 2-6 kbar and the temperature of 920-970°C, at a pressure of 3-4.5 kbar, which are conditions in agreement with andesite and dacite formation. Clinopyroxene crystallized at temperatures of 1020-1170°C, at 2-10 kbar, indicating crystallization at crustal depths of maximum 30 km for the studied intrusive rocks in the Torud-Ahmad Abad magmatic belt.

Environmental Earth Sciences, 2016

The magnetic minerals (e.g., iron oxides) that are present in soils can be easily identified by u... more The magnetic minerals (e.g., iron oxides) that are present in soils can be easily identified by using rockmagnetic techniques. Increased magnetic susceptibility of soils may reflect particles rich in iron oxides of anthropogenic, lithogenic, and pedogenic origin. Therefore, reliable discrimination of these sources is required, especially in areas where neither of them is dominant. The aim of the present study is to assess the lithogenic and anthropogenic contributions to iron-oxide mineralogy of soils in the area of the Anthemountas River basin in the southeast part of Thessaloniki city. Previous investigations within the study area, based on spatial distribution of magnetic susceptibility, revealed the presence of two magnetically enhanced regions. Therefore, the present study is focused on these two areas, in order to characterize the origin of magnetic enhancement. Detailed magnetic analyses include properties reflecting the type, concentration, and relative grainsize distribution of magnetic particles. Moreover, trace element concentration is determined with an aim to establish the link between low-field mass-specific magnetic susceptibility and concentration of Fe, Cr, Ni, Mn, Pb, Zn, and Ti. These findings are supported by descriptions of the micromorphology performed by scanning electron microscopy and determination of elemental composition by energy-dispersive spectrometer analyses in selected points. Finally hierarchical cluster analysis is applied to classify the soil samples into appropriate groups according to their magnetic properties. The results reveal that magnetic measurements provide a useful tool for the discrimination between different magnetic sources responsible for the enhancement of magnetic susceptibility in soils. Low-field mass-specific magnetic susceptibility reflects increased concentration of trace elements, while its combination with other magnetic measurements clearly differentiates the origin of magnetic enhancement in both parts of the study area.

HAL (Le Centre pour la Communication Scientifique Directe), Aug 12, 2022

Minerals

In the present study, rough emerald single crystals and rough emeralds in the host rock from the ... more In the present study, rough emerald single crystals and rough emeralds in the host rock from the ruins of Alexandria and from the Mount Zabargad in Egypt, preserved in the collection of the museum of the Ecole des Mines (Mines Paris—PSL) since the late 19th or early 20th century, are investigated. All samples were characterized by non-destructive spectroscopic and chemical methods during a week-long loan to the LFG. Raman, FTIR and UV-Vis-NIR spectroscopy revealed that Egyptian emeralds contain H2O molecules accompanied by relatively high concentrations of alkali ions and are colored by chromium and iron. Additionally, EDXRF showed that the emeralds from Egypt contain up to 84 ppm Rb and low amounts (below 200 ppm) of Cs. Inclusions and parts of the host rock were also observed under optical microscope and analyzed with Raman spectroscopy. Tube-like structures, quartz, calcite, dolomite, albite and phlogopite are associated minerals, and inclusions are identified in these historic e...

Minerals

Chemical Geology

Two world-first examples of mangan oxide skarns were investigated in this study, namely the Panor... more Two world-first examples of mangan oxide skarns were investigated in this study, namely the Panorama skarn of Drama and the Thapsana skarn of Paros Island, in the Rhodope and Attico-Cycladic Massifs, respectively. Transitional calcic-to-mangan exoskarn at Panorama is exposed in the garnet-epidote zone (Grt-Ep), proximal to the Panorama (micro-)granite. In Paros Island, mangan skarn is related to rhodonite (Rdn ± Ves), johannsenite-spessartine (Jhn-Sps) and spessartine-cummingtonite (Sps-Cum) zones, adjacent to marbles and/or gneisses and the Thapsana leucogranite. A two-stage manganese-oxide assemblage is present in the Thapsana skarn and comprises jacobsite, hausmannite, braunite with minor magnetite (stage I) followed by hollandite, cryptomelane and pyrite (stage II) with gangue rhodochrosite, calcite, and ankerite. Multiple isotopic evidence (i.e., δ18O, δD, δ44Ca, δ26Mg, 87Sr/86Sr, U/Pb) support the granitic source of the Mn-rich metasomatic fluids in both case studies. The Thapsana mangan skarn formed at a pressure of ~110 MPa and a temperature range of ~305° to 565 °C, from initially acidic (pH = 3.5), saline (up to ~48.0 wt% NaCl equivalent), Mn chloride-bearing, skarn-forming fluids with elevated log[αMn2+/(αH+)2] and log[αMn3+/(αH+)3]. Fluid inclusions results obtained from the Jhn-Sps zone suggest phase separation of the metasomatic fluids at ~480 °C and ~120 MPa and ~400 °C and ~100 MPa. Thermodynamic modeling suggests that the manganoan skarn assemblages formed due to simple cooling and fluid-rock interaction, increase in pH and changes in the redox state of the metasomatic fluids in concert with successive deposition of Mn2+ and Mn3+ assemblages. This led to a paragenesis that comprises early anhydrous manganoan silicates, followed by more complex assemblages dominated by hydrous manganoan silicates and Mn3+ oxides. In this study we propose a metallogenic model in which mangan skarns are formed proximally to their parental leucogranites, primarily from anatectic reworking of crustal Mn-rich sources (e.g., gneisses and marbles) that delivered peraluminous melts with increased primary endowments in manganese. Exsolution of chloride magmatic fluids atypically enriched in incompatible manganese, deposited manganoan silicates and oxides with declining temperature in the skarn environment. However, in situ reworking of manganese upon fluid-rock interaction during skarnification cannot be discounted as an additional contributing source for manganese. The results of this study encourage us to propose the establishment of a new mangan-oxide mineralized skarn class as a distinct candidate for skarn mineralization.

Chemical Geology

Dental Materials, Oct 1, 2008

International Journal of Molecular Sciences, Jan 8, 2021

Bulletin of the Geological Society of Greece, 2021

Journal of Non-Crystalline Solids, 2018

Operative Dentistry, 2019

Δελτίον της Ελληνικής Γεωλογικής Εταιρίας, 2013

Carpathian Journal of Earth and Environmental Sciences, Jun 30, 2023

Επιστημονική Επετηρίδα του Τμήματος Γεωλογίας (Α.Π.Θ.), 2010

Kharazmi Journal of Earth Sciences, 2018

$Research paper thumbnail of Petrogenesis of Eocene Agios Gregorious Plutonic complex (Mt. Athos, Greece): interplay between magma mixing, assimilation and fractional crystallization$

Environmental Pollution, 2021

Bulletin of the Geological Society of Greece, 2017

Journal of Geochemical Exploration, 2017

Environmental Earth Sciences, 2016

HAL (Le Centre pour la Communication Scientifique Directe), Aug 12, 2022

Minerals

Chemical Geology

Dolerites from Eastern Varnountas (Florina, W. Macedonia, Greece) are studied. They intrude the C... more Dolerites from Eastern Varnountas (Florina, W. Macedonia, Greece) are studied. They intrude the Carboniferous Varnountas plutonic complex, consisting mainly of granite, granodiorite, monzonite and quartz monzonite, as well as the metamorphic basement, consisting of ortho-and paragneisses and schists. The studied rock-samples show characteristic ophitic texture. The rock-forming minerals are plagioclase, clinopyroxene and olivine. Secondary minerals are amphibole, chlorite, epidote and spinel whereas titanite and rutile occur as accessory minerals. The olivine Fo-content ranges from 51 to 85, with big variations between core and rim at the same sample, and decreases with the increase of SiO2 of the rocks. Clinopyroxene is augite; its En-content ranges from 40 to 53 and remains constant with the increase of SiO2 of the rocks. The An-content of plagioclase composition ranges from An57 to An68, increasing with the increase of SiO2 of the rocks. XRF and ICP-MS-LA techniques were used for the whole-rock analysis for major and trace elements respectively. Their SiO2 content ranges from 46.8 to 49.4 wt% and the MgO from 7.6 to 11.4 wt%. The whole-rock geochemistry indicates two different groups of samples; one group (LT-HK) having low TiO2 (0.78-0.90 wt%) and high K2O (0.77-2.00 wt%) and another (HT-LK) with high TiO 2 (1.02-1.34 wt%) and low K2O (0.13-0.32 wt%). The REE patterns show LREE enrichment. LREE/HREE is low ranging from 1.1 to 1.8 apart the more evolved sample L-18 (LT-HK group) having 6.0. LaCN ranges from 14.3 to 27.9 apart again of sample L-18 with LaCN=63.5. The ΣREE is lower in the LT-HK group ranging from 32.70 to 33.93 ppm (L-18=101.28 ppm), relative to the HT-LK group (42.96 to 61.24 ppm). The Eu anomaly ranges from 0.92 to 1.19 without differences between the two groups. According to the classification diagrams the samples belong to the volcanic arc tholeiitic basalts. The enrichment of REE combined with the low LREE/HREE ratio indicates that the studied dolerites originate in a fertile sp-lherzolite. The LT-HK group is the product of 23% partial melting of it and the HT-LK group of 17%. The CrY diagram implies that the two groups evolved through independent fractional crystallization processes. The comparison of the dolerites with the more basic samples of the Varnountas plutonic complex with similar SiO2 content, shows that the latter are ∼20 times richer in La (LaCN=260-580) with LREE/HREE ratio ranging from 18 to 22, indicating that a common origin is not possible.

Various chemical elements are essential for the human body functions and food chain is a common p... more Various chemical elements are essential for the human body functions and food chain is a common pathway for human exposure to many of those. However, when some elements are found in elevated concentrations, they can be considered as potentially harmful for human health. Hence, the composition of food samples is of great importance. Salt (NaCl) constitutes an integral part of human diet and additionally is the most commonly used food additive. It is apparent therefore, to be aware of the elemental content of edible salts. Refined and unrefined samples of edible salts available in the Greek retail market were evaluated for the present study. After continuous stirring of each sample in deionized water, it was observed that three of them revealed an insoluble residue. These samples were classified according to their color as pink (PS1), black (BS1) and red (RS1). The research revealed that Himalayan Pink Salt residue (PS1) consists mainly of Ca, S and Fe in the form of gypsum and Fe-oxides, respectively. Himalayan Black Salt residue (BS1) contains elevated concentrations of Mg, Na, P and Fe-oxides. Finally, the residue of Hawaiian Red Salt (RS1) is mainly composed of Fe-oxides.