DEVELOPMENT OF LASER-INDUCED FLUORESCENCE METHODS AS A POWERFUL TOOL FOR CHROMATOGRAPHIC ANALYSIS IN FOOD SAFETYSummary: Dende to antigà ¼ idade existiu unha concern na protection two consumers and two non-food trade. A question about food ten direct link diverse interests and contrary tied, or resulting in a definition do Thermos seguridade food becomes nun espazo diverxente, and as cuestións relating aos food, a espazo of constant conflicts. There seguridade food ing all as persoas teñen always physical and economic access to sufficient safe and nutritious food to meet as súas nececesidades food. Unha series of crises concerning á Food and Animal puxeron of manifesto you erros na design and implementation gives food law na European Union. In presenza us food contaminants, and we mainly of orixe animal residues of veterinary drugs, is a maior na present is concern two consumers, puidendo supoñer a súa existence and use a cliff for a saúde public ou unha economic fraud. A key element in seguridade food pois, é assure inocuidade two food. For isto buy dispor analytical methods sensibeis to assure non presenza ou unha concentration debaixo two ceilings residuas estabelecidos for substances or your consumption poida supor a cliff for a saúde. Os estudos levados out not LHICA ao longo destes years indícannos there unha clear relationship between development of resistance to microbial ea na therapeutic use of antimicrobials or animal production. By ilo, aínda you analytical methods desenvolvidos not noso laboratory XA reach sen problems you MRL recollidos na lexislación, cremos that débese further research to achieve diminuilos A fluorescence unha propiedade Ben coñecida of certas molecules, é unha das máis techniques used in analytical chemistry . A two potenciais das techniques é a fluorescent detection and quantification of substances that were previously separate. As features dunha fonte of laser radiation semella a priori as adequate replacement das tradicionais fontes excitation empregadas dg conventional fluorescence techniques. Or a laser foi discovery cunha profound impact not field gives tecnoloxía, permitindo a breakthrough sen precedent moitas science, which sen to súa invention would imposíbeis. A laser optical radiation dun é xeralmente unidirectional, monochromatic and coherent, and is characterized by properties that non posúen outras radiacións electromagnetic. A laser-induced fluorescence, xunto to ou electroforese capillary liquid chromatography, é unha das techniques máis important as analytical ferramenta to separate and identify chemical composto. A detector laser-induced fluorescence, presents numerous benefits over a conventional fluorescence detector. Traditionally or use gives laser-induced fluorescence, utilízase dg areas of neuroscience, biochemistry and various aplicacións medical. Nesta tese desenvólvense novos analytical methods sinxelos, sensíbeis and validated for or control do decoquinato acid oxolínico, flumequine and quinine, baseados not use liquid chromatography gives highly effective as a method of separation, ea laser-induced fluorescence, as a method of detection, for substances with various interested in seguridade food. Or decoquinato is not included Annex II (2377/90, CSE) eo seu use is prohibited in produtores animais de leite for human consumption. É a requerimento (96/23/EC) for you membros states, monitor posíbeis waste coccidiostats us seus nacionais control programs. Desenvolveuse a method of analysis in leite through HPLC-LIF with solid phase extraction. Or analytical method validouse non range of 0.16 and 16.33 ng ml -1 8 estabel b29 ecéndose a limit of detection (sinal / noise ratio = 3) of 0.14 ng ml -1 and a limit of quantification (sinal / Noise = 10) of 0.16 ng mL -1 in leite. A recovery do extraction process foi of 88%. Or method demostrou be liñal, reproducíbel (RSD = 4%) and repetíbel (RSD = 4.4%). Or acid oxolínico ea flumequine antibiotics are synthetic group das quinolones do you cais teñen a amplo spectrum antibacterial action, sendo used considerably in mediciña human and veterinary, cos crags that isto conleva in termos of xeración of bacterial resistance and presenza us food waste and not the environment. Desenvolveuse a de novo chromatographic method for detection to destes compostos, baseada not use gives laser-induced fluorescence and comparouse cunha fonte conventional excitation (lámpada Xenon,? Exc 325 /? Em 365) connecting the two detectors in series. Not if you give FLU limits acadados foron of 14.17 and 0.76 pg / inxección empregando FD and LIF respectively. Os results obtidos amosan who co dun use laser He / Cd, are LODs gives orde of dezanove and corenta times to máis sensibel for detecting and OR FLU respectively, than a conventional detector FD A quinine é an alkaloid that empregou traditionally for or tratamento da malaria. Na or your present is extensive and consumption máis usual provén gives use na producer certo types of drinks. Desenvolveuse an analytical method fast and sensíbel to control or given quinine in beverages non alcólicas. Or foi LOD of 3.20 pg column, correspondent to 0.64 ppb. Non observed interferenzas coas substances commonly present neste types of drinks, preparouse neste sense unha drink synthetic, which desmostrou to especificidade do method. Or estudo fieldwork done, amosa diferenzas na quinine concentration of both kinds of drink not eat pole country of origin, as well eat erros na information subministrada na label pole that cremos necessary mellor information or consumer, XA that súa inxesta non é indicated for certas persoas by razóns medical ou de hipersensibilidade.
