SPECTROSCOPIC STUDIES OF ETHYLENE AND AMMONIA AS BIOMARKERS AT PATIENTS WITH DIFFERENT MEDICAL DISORDERS

Analiza aerului expirat permite observarea proceselor biochimice in organism prin intermediul unei investigatii neinvazive. Concentratia de etilena si ammoniac din aerul exalat este crescuta in bolile inflamatorii. Vom descrie masuratori precise de coeficienti de absorbtie ai etilenei si amoniacului la lungimile de unda ale laserului cu CO2 prin utilizarea unei celule fotoacusitce in configuratie externa si vom compara rezultatele noastre cu alte valori raportate in literatura de specialitate. Setul de valori al coeficientilor de absorbtie, pentru toate lungimile de unda laser, si pentru un gaz special sau vapor se numeste spectrul de absorbtie sau “amprenta”; coeficientii de absorbtie sunt entitati absolute, unice doar la frecventa laserului si a speciilor, care ofera specificul de performanta al instrumentului in ceea ce priveste limita de detectie si respingere a interferentei.

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