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    Wyświetlanie 1-4 z 4
    Tytuł:
    Urine headspace analysis in medical diagnostics
    Autorzy:
    Kalinowska, Kaja
    Namieśnik, Jacek
    Powiązania:
    https://bibliotekanauki.pl/articles/1163146.pdf
    Data publikacji:
    2018
    Wydawca:
    Przedsiębiorstwo Wydawnictw Naukowych Darwin / Scientific Publishing House DARWIN
    Tematy:
    VOC
    biomarkers
    medical diagnostics
    medicine
    urine
    Opis:
    The analysis of the volatile organic compounds in the bodily fluids such as urine may provide useful information on the patients’ general health. The potential application of urine headspace analysis could facilitate the diagnostics of various diseases such as metabolic disorders, urinary tract diseases and gastrointestinal conditions. Described in this paper are the currently available techniques of urine sample analysis as well as their different application in medical diagnostics.
    Źródło:
    World Scientific News; 2018, 110; 236-243
    2392-2192
    Pojawia się w:
    World Scientific News
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Multi-element analysis of urine using dynamic reaction cell inductively coupled plasma mass spectrometry (ICP-DRC-MS) — A practical application
    Autorzy:
    Brodzka, Renata
    Trzcinka-Ochocka, Małgorzata
    Janasik, Beata
    Powiązania:
    https://bibliotekanauki.pl/articles/2179785.pdf
    Data publikacji:
    2013-04-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    metals
    trace elements
    exposure
    urine
    ICP-MS
    Opis:
    Objectives: The method for the determination of As, Al, Cd, Ni, Pb (toxic elements) and Cr, Co, Cu, Fe, Mn, Zn (essential elements) in human urine by the use of Inductively Coupled Plasma Mass Spectrometry (quadrupole ICP-MS DRCe Elan, Perkin Elmer) with the dynamic reaction cell (DRC) was developed. Materials and Methods: The method has been applied for multi-element analysis of the urine of 16 non-exposed healthy volunteers and 27 workers employed in a copper smelter. The analysis was conducted after initial 10-fold dilution of the urine samples with 0,1% nitric acid. Rhodium was used as an internal standard. The method validation parameters such as detection limit, sensitivity, precision were described for all elements. Accuracy of the method was checked by the regular use of certified reference materials ClinCheck®-Control Urine (Recipe) as well as by participation of the laboratory in the German External Quality Assessment Scheme (G-EQUAS). Results: The detection limits (DL 3s) of the applied method were 0.025, 0.007, 0.002, 0.004, 0.004, 0.086, 0.037, 0.009, 0.016, 0.008, 0.064 (μg/l) for Al, As, Cd, Cr, Co, Cu, Fe, Mn, Ni, Pb, Zn in urine, respectively. For each element linearity with correlation coefficient of at least 0.999 was determined. Spectral interferences from some of the ions were removed using DRC-e with addition of alternative gas: methane for cobalt, copper, cadmium, chromium, iron, manganese, nickel and rhodium, and oxygen for arsenic. Conclusions: The developed method allows to determine simultaneously eleven elements in the urine with low detection limits, high sensitivity and good accuracy. Moreover, the method is appropriate for the assessment of both environmental and occupational exposure.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 2; 302-312
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Opracowanie procedury oznaczania trzech związków z grupy farmaceutyków w próbkach moczu ludzkiego z wykorzystaniem procedury opartej na zastosowaniu techniki HPLC
    Development of a procedure for the determination of three selected pharmaceuticals in human urine by means of HPLC
    Autorzy:
    Gnida, A.
    Marciocha, D.
    Turek-Szytow, J.
    Powiązania:
    https://bibliotekanauki.pl/articles/297508.pdf
    Data publikacji:
    2017
    Wydawca:
    Politechnika Częstochowska. Wydawnictwo Politechniki Częstochowskiej
    Tematy:
    HPLC
    pharmaceuticals
    urine
    quantitative analysis
    farmaceutyki
    mocz
    analiza ilościowa
    Opis:
    The aim of the study was to examine the possibility of determination and optimization of methodology for analysis of three selected drugs: trimethoprim, sulfamethoxazole and diclofenac in urine using high-performance liquid chromatography, without extraction of the pharmaceuticals to the solid phase. The chromatographic separation conditions were determined using a gradient elution system and mobile phase, which was a mixture of acetonitrile and a phosphate buffer, allowing detection of trimethoprim, sulfamethoxazole and diclofenac from 260, 210 and 310 μg/L respectively, and simultaneous determination of these analytes in the presence of urine components.
    Celem pracy było sprawdzenie możliwości i opracowanie metodyki oznaczania trzech wybranych leków: trimetoprimu, sulfametoksazolu i diklofenaku w moczu z wykorzystaniem wysokosprawnej chromatografii cieczowej (ang. high performance liquid chromatography, HPLC) bez uprzedniej ekstrakcji analitów do fazy stałej. Określono warunki rozdzielania chromatograficznego z zastosowaniem elucji gradientowej fazy ruchomej, którą była mieszanina acetonitrylu i buforu fosforanowego, co pozwoliło na detekcję trimetoprimu, sulfametoksazolu i diklofenaku odpowiednio na poziomie od 260, 210 i 310 μg/l i równoczesne oznaczenie tych analitów w obecności składników moczu.
    Źródło:
    Inżynieria i Ochrona Środowiska; 2017, 20, 4; 429-445
    1505-3695
    2391-7253
    Pojawia się w:
    Inżynieria i Ochrona Środowiska
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
    Tytuł:
    Electronic noses for monitoring benzene occupational exposure in biological samples of Egyptian workers
    Autorzy:
    Mohamed, Ehab I.
    Khalil, Gihane I.
    Abdel-Mageed, Samir M.
    Bayoumi, Amani M.
    Ramadan, Heba S.
    Kotb, Metwally A.
    Powiązania:
    https://bibliotekanauki.pl/articles/2179801.pdf
    Data publikacji:
    2013-03-01
    Wydawca:
    Instytut Medycyny Pracy im. prof. dra Jerzego Nofera w Łodzi
    Tematy:
    phenol
    muconic acid
    exhaled air
    blood
    urine
    principal component analysis
    Opis:
    Objectives: Benzene is commonly emitted in several industries, leading to widespread environmental and occupational exposure hazards. While less toxic solvents have been substituted for benzene, it is still a component of petroleum products and is a trace impurity in industrial products resulting in continued higher occupational exposures in industrial settings in developing countries. Materials and Methods: We investigated the potential use of an electronic nose (e-nose) to monitor the headspace volatiles in biological samples from benzene-exposed Egyptian workers and non-exposed controls. The study population comprised 150 non-smoking male workers exposed to benzene and an equal number of matching non-exposed controls. We determined biomarkers of benzene used to estimate exposure and risk including: benzene in exhaled air and blood; and its urinary metabolites such as phenol and muconic acid using gas chromatography technique and a portable e-nose. Results: The average benzene concentration measured in the ambient air of the workplace of all studied industrial settings in Alexandria, Egypt; was 97.56±88.12 μg/m³ (range: 4.69–260.86 μg/m³). Levels of phenol and muconic acid were signifi cantly (p < 0.001) higher in both blood and urine of benzene-exposed workers as compared to non-exposed controls. Conclusions: The e-nose technology has successfully classifi ed and distinguished benzene-exposed workers from non-exposed controls for all measured samples of blood, urine and the exhaled air with a very high degree of precision. Thus, it will be a very useful tool for the low-cost mass screening and early detection of health hazards associated with the exposure to benzene in the industry.
    Źródło:
    International Journal of Occupational Medicine and Environmental Health; 2013, 26, 1; 165-172
    1232-1087
    1896-494X
    Pojawia się w:
    International Journal of Occupational Medicine and Environmental Health
    Dostawca treści:
    Biblioteka Nauki
    Artykuł
      Wyświetlanie 1-4 z 4

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