3 research outputs found

    Analysis of acrilamyde by liquid chromatography tandemmasspectrometer

    No full text
    Akrilamīda noteikšana maizes paraugos, izmantojot šķidrumu hromatogrāfiju -tandēma masspektrometriju. M. Porozovs, zinātniskais vadītājs asoc. prof. P. Mekšs, maģistra darbs, 60 lpp, 30 attēli, 12 tabulas, 24 literatūras avoti, bez pielikuma. Latviešu valodā. Darbā veikta metodes uzlabošana akrilamīda satura noteikšanai rudzu maizē un galveno parametru validācija. Analīzes veiktas ar šķidrumu hromotogrāfu - tandēma masspektrometru. Darbā aprakstīti iekārtas parametru un analīzes apstākļu izvēles principi akrilamīda noteikšanai rudzu maizē. Novērtēti svarīgākie validācijas parametri: selektivitāte, metodes precizitāte, atkārtojamība, ekstrakcijas atgūstamība, kalibrācija, zemākā noteikšanas robeža un zemākā kvantificēšanas robeža. Pēc metodes izstrādes un validācijas, veiktas SIA „Lāči” ražotās un mājās ceptās maizes analīzes. Iegūtie rezultāti par maizes paraugiem ir savstarpēji salīdzināti. AKRILAMĪDS, MASSPEKTROMETRIJA, MAJĀRA REAKCIJA, EKSTRAKCIJA, ATGŪSTAMĪBA, PRECIZITĀTE, KAAnalysis of acrylamide in ray bred by liquid chromatography tandem-masspectrometry. M. Porozovs, scientific supervisor asoc. prof. P.Mekšs. Master thesis, 60 pages, 30 image, 12 tables, 24 literature source, without appendix. Latvian language. Development of acrylamide analysis method in ray bred has been carried out and validation of main parameters has been provided. Analysis has been made by liquid chromatography tandem mass spectrometry. Choice principles of equipment parameters and analysis conditions for analysis of acrylamide in ray bred have been described in thesis. General validation parameters like selectivity, method precision, repeatability, recovery of extraction, calibration, limit of detection, lower limit of quantification have been evaluated. Analysis of at SIA „Lāči” produced and at home baked bred was carried out according the developed method and its validation. Obtained results about samples of bred have been compared. ACRYLAMIDE, MASSPECTROMETRY, MALAR REACTI

    Analysis of acrilamyde by liquid chromatography tandemmasspectrometer

    No full text
    Akrilamīda noteikšana maizes paraugos, izmantojot šķidrumu hromatogrāfiju -tandēma masspektrometriju. M. Porozovs, zinātniskais vadītājs asoc. prof. P. Mekšs, maģistra darbs, 60 lpp, 30 attēli, 12 tabulas, 24 literatūras avoti, bez pielikuma. Latviešu valodā. Darbā veikta metodes uzlabošana akrilamīda satura noteikšanai rudzu maizē un galveno parametru validācija. Analīzes veiktas ar šķidrumu hromotogrāfu - tandēma masspektrometru. Darbā aprakstīti iekārtas parametru un analīzes apstākļu izvēles principi akrilamīda noteikšanai rudzu maizē. Novērtēti svarīgākie validācijas parametri: selektivitāte, metodes precizitāte, atkārtojamība, ekstrakcijas atgūstamība, kalibrācija, zemākā noteikšanas robeža un zemākā kvantificēšanas robeža. Pēc metodes izstrādes un validācijas, veiktas SIA „Lāči” ražotās un mājās ceptās maizes analīzes. Iegūtie rezultāti par maizes paraugiem ir savstarpēji salīdzināti. AKRILAMĪDS, MASSPEKTROMETRIJA, MAJĀRA REAKCIJA, EKSTRAKCIJA, ATGŪSTAMĪBA, PRECIZITĀTE, KAAnalysis of acrylamide in ray bred by liquid chromatography tandem-masspectrometry. M. Porozovs, scientific supervisor asoc. prof. P.Mekšs. Master thesis, 60 pages, 30 image, 12 tables, 24 literature source, without appendix. Latvian language. Development of acrylamide analysis method in ray bred has been carried out and validation of main parameters has been provided. Analysis has been made by liquid chromatography tandem mass spectrometry. Choice principles of equipment parameters and analysis conditions for analysis of acrylamide in ray bred have been described in thesis. General validation parameters like selectivity, method precision, repeatability, recovery of extraction, calibration, limit of detection, lower limit of quantification have been evaluated. Analysis of at SIA „Lāči” produced and at home baked bred was carried out according the developed method and its validation. Obtained results about samples of bred have been compared. ACRYLAMIDE, MASSPECTROMETRY, MALAR REACTI

    Pyranylidene Indene-1,3-Dione Derivatives as an Amorphous Red Electroluminescence Material

    No full text
    The organic light-emitting diode (OLED) has promising applications in flat-panel displays and novel light sources. Thus far, OLED structures have mostly been made by thermal evaporation in vacuum. An alternative approach is to use small molecules that form amorphous (glassy) structures from solutions. Such compounds can be used in ink-jet printing technologies and result in reduced OLED prices. We present an original red fluorescent organic compound 2-(2-(4-(bis(2-(trityloxy)ethyl)amino)styryl)-6-methyl-4H-pyran-4-ylidene)-1H-indene-1, 3(2H)-dione (ZWK1), and its derivative 2-(2,6-bis(4-(bis(2-(trityloxy)ethyl) amino)styryl)-4Hpyran- 4-ylidene)-1H-indene-1,3(2H)-dione (ZWK2), where the methyl group is replaced with a 4-substituted-styryl group. This change could improve the formation of glassy structures. The thickness of the electroluminescent layer in the device is optimized to the higher power efficiency and obtains: ITO/PEDOT:PSS (40 nm)/ZWK1 (95 nm)/LiF (1 nm)/Al (100 nm), and ITO/PEDOT:PSS (40 nm)/ZWK2 (85 nm)/LiF (1 nm)/Al (100 nm). The maximum of electroluminescence (EL) spectra for the device with the ZWK1 compound is 667 nm, which corresponds to the CIE coordinates x = 0.65 and y = 0.34. The power and luminance efficiency at a luminance of 100 cd/m2 is 0.63 lm/W and 1.78 cd/A, respectively. Adding an additional 4-substituted-styryl group to the ZWK1 molecule shifts the maximum of EL spectra to the red region (705 nm) and decreases the efficiencies by one order
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