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    Wyświetlanie 1-12 z 12
    Tytuł:
    Solid Phase Extraction for Evaluation of Occupational Exposure to Pb (II) Using XAD-4 Sorbent Prior to Atomic Absorption Spectroscopy
    Autorzy:
    Shahtaheri, S. J.
    Khadem, M.
    Golbabaei, F.
    Rahimi-Froushan, A.
    Ganjali, M. R.
    Norouzi, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/90822.pdf
    Data publikacji:
    2007
    Wydawca:
    Centralny Instytut Ochrony Pracy
    Tematy:
    lead
    sample preparation
    atomic absorption spectroscopy
    Opis:
    Lead is an important constituent widely used in different industrial processes. For evaluation of workers’ exposure to trace toxic metal of Pb (II), solid-phase extraction (SPE) was optimized. SPE using mini columns filled with XAD-4 resin was developed with regard to sample pH, ligand concentration, loading flow rate, elution solvent, sample volume, elution volume, the amount of resins, and sample matrix interferences. Lead ions were retained on a solid sorbent and then eluted, followed by a simple determination of analytes with flame atomic absorption spectrometery. The obtained recoveries of metal ions were greater than 92%. This method was validated with 3 different pools of spiked urine samples; it showed a good reproducibility over 6 consecutive days as well as 6 within-day experiments. This optimized method can be considered successful in simplifying sample preparation for a trace residue analysis of lead in different matrices when evaluating occupational and environmental exposures is required.
    Źródło:
    International Journal of Occupational Safety and Ergonomics; 2007, 13, 2; 137-145
    1080-3548
    Pojawia się w:
    International Journal of Occupational Safety and Ergonomics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Evaluation of Zinc Accumulation in Moss (Pylaisia polyantha) Growing Near Intensive Traffic Street Based on Modelling and Experimental Data
    Autorzy:
    Paliulis, Dainius
    Powiązania:
    https://bibliotekanauki.pl/articles/2069911.pdf
    Data publikacji:
    2021
    Wydawca:
    Politechnika Koszalińska. Wydawnictwo Uczelniane
    Tematy:
    zinc
    moss
    atomic absorption spectroscopy
    Gaussian plume model
    Opis:
    Pylaisia polyantha moss growing near intensive traffic in Geležinis Vilkas street at Vingis Park (Vilnius) was selected as an indicator of environmental pollution. Two models were applied for the study: the Gaussian plume model – for zinc emission from automobiles calculation and mathematical model – for recalculating the zinc emission from transport to zinc concentration in moss. Moss samples were collected during spring, summer and autumn. There were no significant changes in Zn concentrations between these periods. Zn emission dispersion from pollution source was calculated only for one vehicle, in order to reach relationships between environmental conditions and dispersion of Zn emission from vehicle exhaust fumes pipe. It was detected that the concentration of Zn tends to decrease with the distance from the pollution source. It was observed that there was a strong relationship between wind speed and Zn concentration – the slower the wind speed, the higher concentration of zinc in moss.
    Źródło:
    Rocznik Ochrona Środowiska; 2021, 23; 198--213
    1506-218X
    Pojawia się w:
    Rocznik Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Minerals content, essential oils composition and physicochemical properties of Citrus jambhiri Lush. (Rough Lemon) from the Sudan
    Autorzy:
    Mohammed, A. M. H.
    Ibrahim, M. A
    Omran, A. A.
    Mohamed, E. M.
    Elsheikh, S. E. M.
    Powiązania:
    https://bibliotekanauki.pl/articles/412508.pdf
    Data publikacji:
    2013
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    Citrus jambhiri
    Rutaceae
    atomic absorption spectroscopy (AAS)
    Flame Atomic Emission Spectroscopy (FAES)
    metal content
    essential oils
    Opis:
    Minerals content of Citrus jambhiri (rough lemon) fruit was qualitatively and quantitatively analyzed using atomic absorption spectroscopy (AAS) and flame atomic emission spectrometry (FAES). The peel, moisture and ash contents of rough lemon were found to be 18.35 %, 23.75 % and 2.04 % respectively. Vitamin C (ascorbic acid) of rough lemon juice was found to be 70.0 mg/100 g. The chemical composition of essential oil of rough lemon peel was determined. The major compound was found to be limonene (84.5 %) followed by sabinene, β-myrcene, α-terpineol, 1,3-tetradecadiene and linalool.
    Źródło:
    International Letters of Chemistry, Physics and Astronomy; 2013, 9, 1; 25-30
    2299-3843
    Pojawia się w:
    International Letters of Chemistry, Physics and Astronomy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Correlation between airborne manganese concentration at the workstations in the iron foundry and manganese concentration in workers’ blood
    Autorzy:
    Mirmohammadi, Seyedtaghi
    Moghaddasi, Yosef
    Yazdani, Jamshid
    Yousefinejad, Razyeh
    Esfandyari, Yahya
    Gorgani, Mohsen
    Habibpour, Manijeh
    Powiązania:
    https://bibliotekanauki.pl/articles/2164084.pdf
    Data publikacji:
    2017-06-27
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    atomic absorption spectroscopy
    foundry
    blood assessment
    manganese airborne particle
    air and blood assessment
    workers
    Opis:
    Background Manganese (Mn) used as raw material for melting process in the ferrous foundry is considered as hazardous neurotoxic substance because it accumulates in the central nervous system and may cause neurological disorders. The furnace-men and melting department workers are potentially exposed to manganese particles or fume in the workplace. The objective of the research has been to investigate the sources and levels of manganese exposure in the foundry by correlation of blood-manganese (B-Mn) and air-manganese (air-Mn) measurement. Material and Methods Air-Mn and Mn of blood serum were measured involving workers who worked in a big-sized foundry during 1 year. The standard method of the Occupational Safety and Health Administration (OSHA) ID-121 was used for air and blood assessment and atomic absorption spectroscopy (AAS) was carried out for air and blood sample analysis. Results The air sampling results have revealed that there is a high exposure to manganese (4.5 mg/m3) in the workplace as compared to the National Institute for Occupational Safety and Health’s (NIOSH) time weighted average (the reference time-weighted average (TWA) = 1 mg/m³). The average blood serum Mn concentration was 2.745 μg/l for subjects working for shorter than 3 months and 274.85 μg/l for subjects working 3–12 months. Conclusions Against the research hypothesis there was no correlation between the air-Mn concentration and the B-Mn (serum) level of manganese in the serum of the exposed subjects. It may be due to short time of air sampling of manganese airborne particles, and a real-time monitoring of airborne manganese particles is suggested for any future study. Med Pr 2017;68(4):449–458
    Źródło:
    Medycyna Pracy; 2017, 68, 4; 449-458
    0465-5893
    2353-1339
    Pojawia się w:
    Medycyna Pracy
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Investigation of microelements contents in aerial parts of Agrimonia eupatoria L., collected in Lviv region (Ukraine)
    Autorzy:
    Lysiuk, Roman
    Zaritska, Yeva
    Darmohray, Roman
    Powiązania:
    https://bibliotekanauki.pl/articles/2182161.pdf
    Data publikacji:
    2016-12-31
    Wydawca:
    Uniwersytet Pedagogiczny im. Komisji Edukacji Narodowej w Krakowie
    Tematy:
    ААС/ЕА (atomic absorption spectroscopy with electrothermal atomization)
    Agrimonia eupatoria
    microelements
    renoprotective
    selenium
    trace elements
    Opis:
    The genus Agrimonia L. of the family Rosaceae Juss. is known to include valuable medicinal plants. Agrimony is well known for its beneficial effects in various diseases such as liver complaints, gall-bladder stones; diarrhea, edemas and kidney ailments. The contents of microelements in aerial parts of Agrimonia eupatoria, an official herbal drug, collected from wild samples in the suburb of Lviv city, Western Ukraine, have been determined by atomic absorption spectroscopy with electrothermal atomization (ААС/ЕА) on VARIAN AA 240Z after mineralization in the microwave Milestone Start D. The found quantities of trace elements in the analyzed samples were as follows: manganese - 46.9 µg/g, copper - 7.9 µg/g, selenium - 0.16 µg/g, lead - 0.15 µg/g, cadmium - 0.05 µg/g. The received research outcomes were compared with results of other known scientific investigations of the medicinal plant material. The determined amounts of lead and cadmium in the investigated samples of the herbal drug complied with the World Health Organization (WHO) requirements. The special attention is paid for pharmacological effects, related to its renal impact, contents of selenium and phenolic compounds that allows considering the herbal drug as a promising nephroprotective agent.
    Źródło:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae; 2016, 1; 95-104
    2543-8832
    2545-0999
    Pojawia się w:
    Annales Universitatis Paedagogicae Cracoviensis Studia Naturae
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Towards miniaturized sensors for determination of exchangeable potassium in soil samples
    Autorzy:
    Grygolowicz-Pawlak, E.
    Plachecka, K.
    Wolanin, B.
    Malinowska, E.
    Powiązania:
    https://bibliotekanauki.pl/articles/25360.pdf
    Data publikacji:
    2006
    Wydawca:
    Polska Akademia Nauk. Instytut Agrofizyki PAN
    Tematy:
    soil analysis
    measurement
    soil
    inductively coupled plasma-mass spectroscopy
    atomic absorption spectroscopy
    miniaturization
    potentiometric electrode
    standard method
    nutrient level
    flame emission spectroscopy
    Źródło:
    International Agrophysics; 2006, 20, 2
    0236-8722
    Pojawia się w:
    International Agrophysics
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy metal concentration in plerocercoids of Triaenophorus nodulosus [Pallas, 1781] [Cestoda: Triaenophoridae] and in different organs of their host - perch Perca fluviatilis [L.]
    Autorzy:
    Popiołek, M.
    Okulewicz, A.
    Dobicki, W.
    Nowak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/2143843.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Triaenophorus nodulosus
    organ
    atomic absorption spectroscopy
    water pollutant
    different organ
    host
    parasite
    Cestoda
    determination
    perch
    plerocercoid
    Triaenophoridae
    Perca fluviatilis
    concentration
    water pollution
    heavy metal
    Opis:
    Background. Heavy metals are at present classified among the most important and dangerous water pollutants. Since over 15 years parasites have been used as a bioindicators of water pollution, e.g. using their ability to accumulate heavy metals. Concentration of four elements (Zn, Cd, Ni, Cu) in selected organs of the perch (Perca fluviatilis) and in the tissues of its parasite, plerocercoid of the tapeworm Triaenophorus nodulosus, was analysed. Material and methods. The fish were subject to full helminthological section, resulting in 66 tapeworm larvae isolated from cysts, located in the liver. Plerocecroids, gills, liver and intestine with duodenum were removed and frozen. Content of heavy metals was determined with atomic absorption spectroscopy method. Results. The distribution of the content of Ni, Cd and Zn was similar. In all cases, among all the examined fish organs, the highest mean concentration of the metals was found in the liver, followed by the intestine; it was the lowest in the gills. The mean concentration of the metals in the tapeworm tissues was from 6 to 74 x higher than in the gills, 5−37 x higher than in the intestine and 2.5−28 x higher than in the liver. The concentration of Cu was also the highest in the tapeworm tissues, but its concentration in the fish intestine and liver was nearly the same; it was the lowest in the gills.
    Źródło:
    Wiadomości Parazytologiczne; 2007, 53, 1; 21-24
    0043-5163
    Pojawia się w:
    Wiadomości Parazytologiczne
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Heavy metal concentration in plerocercoids of Triaenophorus nodulosus [Pallas, 1781] [Cestoda: Triaenophoridae] and in different organs of their host - perch Perca fluviatilis [L.]
    Autorzy:
    Popiolek, M.
    Okulewicz, A.
    Dobicki, W.
    Nowak, R.
    Powiązania:
    https://bibliotekanauki.pl/articles/836654.pdf
    Data publikacji:
    2007
    Wydawca:
    Polskie Towarzystwo Parazytologiczne
    Tematy:
    Triaenophorus nodulosus
    organ
    atomic absorption spectroscopy
    water pollutant
    different organ
    host
    parasite
    Cestoda
    determination
    perch
    plerocercoid
    Triaenophoridae
    Perca fluviatilis
    concentration
    water pollution
    heavy metal
    Źródło:
    Annals of Parasitology; 2007, 53, 1
    0043-5163
    Pojawia się w:
    Annals of Parasitology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Reactivity of (3-aminopropyl)trimethoxysilane with cellulose
    Autorzy:
    Woźniak, Magdalena
    Ratajczak, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/2200222.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    cellulose
    infrared spectroscopy
    elemental analysis
    atomic absorption spectrometry
    Opis:
    Reactivity of (3-aminopropyl)trimethoxysilane with cellulose. The paper presents the results of tests for the reactivity of (3-aminopropyl)trimethoxysilane (APTMOS) with cellulose. The cellulose was treated with aqueous ethanolic solution of silane in two concentration: 5% and 20%. The reactivity of APTMOS with cellulose was analysed using instrumental methods: attenuated total reflectance Fourier transform infrared spectroscopy, atomic absorption spectrometry and elemental analysis. In the FTIR spectra of silane-treated cellulose, the bands of Si-O, Si-C and N-H bonds were detected. The analysis of silicon and nitrogen concentration in treated cellulose confirmed the presence of silane in cellulose structure. The presented results indicate that APTMOS forms chemical bonds with cellulose.
    Reaktywność 3-(aminopropylo)trimetoksysilanu z celulozą. W pracy przedstawiono wyniki badań reaktywności 3-(aminopropylo)trimetoksysilanu (APTMOS) z celulozą. Celuloza była traktowana etanolowym roztworem silanu w dwóch stężeniach, wynoszących 5 i 20%. Reaktywność APTMOS z celulozą była analizowana z wykorzystaniem metod instrumentalnych, w tym spektroskopii osłabionego całkowitego odbicia w podczerwieni z transformacją Fouriera, atomowej spektroskopii absorpcyjnej oraz analizy elementarnej. W widmach FTIR celulozy poddanej działaniu silanu obserwowano pasma pochodzące od wiązań Si-O, Si-C i N-H. Analiza stężenia krzemu i azotu w modyfikowanej celulozie potwierdziła obecność silanu w strukturze celulozy. Przedstawione wyniki wskazują, że APTMOS tworzy wiązania chemiczne z celulozą.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 109; 53--57
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Organosilanes in wood protection – chemical analysis of wood and cellulose treated with MTMOS
    Autorzy:
    Babicka, Marta
    Woźniak, Magdalena
    Ratajczak, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/2200179.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Scots pine
    cellulose
    methyltrimethoxysilane
    infrared spectroscopy
    atomic absorption spectrometry
    Opis:
    Organosilanes in wood protection – chemical analysis of wood and cellulose treated with MTMOS. The paper presents the results of methyltrimethoxysilane (MTMOS) reactivity with Scots pine wood and cellulose. The lignocellulosic material after treatment with ethanolic solution of MTMOS was analysed using instrumental methods – atomic absorption spectrometry (AAS) and attenuated total reflectance Fourier transform infrared spectroscopy (ATR-FTIR). The analysis of silicon concentration in treated material indicated the presence of silane in structure of wood and cellulose. The bands characteristic of vibrations of the silicon-carbon and silicon-oxygen originating from MTMOS molecule were observed in the spectra of modified materials, which confirmed the reactivity of silane with wood and cellulose. Moreover, the chemical analysis indicated that MTMOS exhibited higher reactivity to cellulose than to pine wood.
    Organosilany w ochronie drewna – analizy chemiczne drewna i celulozy traktowanej MTMOS. W pracy przedstawiono wyniki badań reaktywności metylotrimetoksysilanu (MTMOS) z drewnem sosny zwyczajnej oraz celulozą. Materiał lignocelulozowy po działaniu etanolowego roztworu MTMOS był analizowany z wykorzystaniem metod instrumentalnych – AAS oraz ATR-FTIR. Analiza stężenia krzemu w impregnowanym materiale wskazuje na obecność silanu w strukturze drewna i celulozy. Charakterystyczne pasma dla drgań krzem-węgiel oraz krzem-tlen, pochodzące z cząsteczki MTMOS obserwowane w widmach modyfikowanych materiałów potwierdzają reaktywność silanu z drewnem oraz celulozą. Ponadto, analiza chemiczna wykazała, że MTMOS wykazywał wyższą reaktywność wobec celulozy niż drewna sosny.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 110; 5--8
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    A reaction of [3-(2-aminoethylamino)propyl]trimethoxysilane with wood and cellulose – chemical analyses
    Autorzy:
    Woźniak, Magdalena
    Ratajczak, Izabela
    Powiązania:
    https://bibliotekanauki.pl/articles/2200217.pdf
    Data publikacji:
    2020
    Wydawca:
    Szkoła Główna Gospodarstwa Wiejskiego w Warszawie. Wydawnictwo Szkoły Głównej Gospodarstwa Wiejskiego w Warszawie
    Tematy:
    Scots pine
    cellulose
    infrared spectroscopy
    elemental analysis
    atomic absorption spectrometry
    Opis:
    A reaction of [3-(2-aminoethylamino)propyl]trimethoxysilane with wood and cellulose – chemical analyses. The paper presents tests results for [3-(2-aminoethylamino)propyl]trimethoxysilane (AATMOS) reactivity with cellulose and Scots pine wood. The tested material was treated with ethanolic solution of aminosilane and analyzed using instrumental methods, including elemental analysis, atomic absorption spectrometry and infrared spectroscopy. The results of the chemical analysis indicated that [3-(2-aminoethylamino)propyl]trimethoxysilane exhibited reactivity with both cellulose and pine wood. In addition, AATMOS-treated cellulose showed a higher content of silicon and nitrogen and more significant changes in FTIR spectra than the treated wood, suggesting that AATMOS showed a higher reactivity to cellulose than to wood.
    Reakcja [3-(2-aminoetyloamino)propylo]trimetoksysilanu z drewnem i celulozą – analizy chemiczne. W pracy przedstawiono wyniki reaktywności [3-(2-aminoetyloamino)-propylo]trimetoksysilanu (AATMOS) z celulozą i drewnem sosny zwyczajnej. Badany materiał traktowano etanolowym roztworem aminosilanu i analizowano z wykorzystaniem metod instrumentalnych, takich jak: analiza elementarna, atomowa spektrometria absorpcyjna i spektroskopia w podczerwieni. Uzyskane wyniki wskazują, na reaktywność [3-(2-aminoetyloamino)propylo]trimetoksysilanu zarówno z celulozą jak i drewnem sosny. Ponadto, celuloza traktowana AATMOS charakteryzowała się większą zawartością krzemu i azotu oraz intensywniejszymi zmianami w widmach FTIR w porównaniu do impregnowanego drewna, co sugeruje, że AATMOS wykazuje większą reaktywność do celulozy niż do drewna.
    Źródło:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology; 2020, 109; 43--47
    1898-5912
    Pojawia się w:
    Annals of Warsaw University of Life Sciences - SGGW. Forestry and Wood Technology
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Determination of elements by atomic absorption spectrometry and energy dispersive X-ray spectroscopy in humic acids and soil samples
    Oznaczanie pierwiastków za pomocą atomowej spektrometrii absorpcyjnej i spektrometrii rentgenowskiej energii rozproszonej w próbkach kwasów huminowych oraz gleby
    Autorzy:
    Konečná, M.
    Pospíšilová, L.
    Škarpa, P.
    Powiązania:
    https://bibliotekanauki.pl/articles/125973.pdf
    Data publikacji:
    2011
    Wydawca:
    Towarzystwo Chemii i Inżynierii Ekologicznej
    Tematy:
    humic acids
    labile forms
    atomic absorption spectrometry
    energy dispersive X-ray spectroscopy
    kwasy huminowe
    formy labilne
    spektrometria absorpcji atomowej
    spektroskopia z dyspersją energii promieniowania X
    Opis:
    Determination of various elements in humic acids and soil samples is important with regard to their biological availability. This work was focused on the identification of trace elements presented in soil samples and humic acids preparates. The object of our study was the samples of grassland soil classified according to FAO as Eutric Cambisol (locality Vatín, Czech-Moravian Upland). Labile and total several element contents in the studied samples were determined. The labile forms were measured in the 0.01 M CaCl2 extract by using high resolution continuum source atomic absorption spectrometer. Total element contents were determined after extraction in aqua regia. Basic soil properties were measured by commonly used methods - soil reaction and conductivity by potentiometric method, texture by pipette method, CEC according to Kappen method and Cox by titrimetric oxidation. Soil humic acids (HA) were isolated according to standard IHSS method. Elemental composition of HA was determined by CHSN/O analyzer. Energy dispersive X-ray spectroscopy allowed us to detect elements in situ in HA molecule and following elements were found: Fe, Cu, Zn, Ti, Ca, K, S, P, Si and Br. The presence of mentioned elements in humic acids preparates was compared with the determined amounts of labile forms and total contents in the soil samples.
    Źródło:
    Proceedings of ECOpole; 2011, 5, 2; 377-381
    1898-617X
    2084-4557
    Pojawia się w:
    Proceedings of ECOpole
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
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