Effects of dietary n-3 polyunsaturated fatty acids and ... - FINS

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1 st WorkshopXIII International Feed Technology Symposium3. Chickens from the group in which adsorbent (K) was not added during broilerfeeding had the lowest values in terms of body mass and the mass of chilledcarcasses.4. The highest mass value in live chickens. as well as the those in chilled carcasseswere identified in the group in which 0.5% of Min-a-zel (O-I) was added duringbroiler feeding.5. Irrespective of the differences in diets and different values in mass of live chickensand chilled carcasses. the yields in control and experimental group were almostequal.ACKNOWLEDGEMENTSInvestigation performed in this study were financed by funds of Ministary of science andtechnological development in frames of project TR-20066. nemed „Food productionchain sustainability“REFERENCES1. Adamović, M., Tomašević-Čanović, M., Milošević, S., Daković A., Lemić,J: The Contribution of mineral adsorbents in the improvement of animalperformance, health and quality of animal products. Biotechnology in AnimalHusbandry 19 (5-6) (2003), 383-395.2. Daković, A., Tomašević-Čanović, M., Dondur, V., Stojčić, D., Rottinghaus,G: In vitro adsorption of zearalenone by octadecyldimethyl benzyl ammoniumexchanged clinoptilolite-heulandite tuffand bentonite. In A. Galarneau, F. DiRenzo, F. Fajula, J. Vedrina (Eds.), Zeolites and Mesoporous Materials at theDawn of the 21st Century, Stud. Surf. Sci. Catal. Vol. 135, Proc. 13thInternational Zeolite Conference, Montpellier, France, Elsevier, 2001, 5276-83.3. Lemke S. L., Grant P. G., Phillips T. D: Adsorption of Zearalenone byOrganophilic Montmorillonite, J. Agric. Food Chem. 46(9) (1998), 3789–3796.4. Radović, Vera, Rajić, I., Radovanović, T., Stanić, D: Uticaj zeolita dodatogu krmne smeše za kokoši nosilje na broj hogovih jedinica jaja. SimpozijumNaučna dostignuća u stočarstvu, juni 2001, Herceg Novi. Savremenapoljoprivreda, posebno izdanje, 3-4, Novi Sad, (2001), str. 125-127.5. Radović Vera, I. Rajić, D. Stanić: Efekat različitih izvora fosfora na randmanepilića. Meat Technology, Vol. 44, No. 5–6, pp. (2003) 195–226, Belgrade.6. Radović, Vera, Bogosavljević-Bošković Snežana: Primena prirodnih zeolitau ishrani živine. Prirodne mineralne sirovine i mogućnosti njihove upotrebe upoljoprivrednoj prizvodnji i prehrambenoj industiji- MONOGRAFIJA- Savezpoljoprivrednih inženjera i tehničara i Geoinstitut, Beograd, (2006), str.275-287.7. Sinovec Z., Sinovec Snežana, Resanović Radmila: Prevencija i kontrolamikotoksina korišćenjem adsorbenata. IX Savetovanje veterinara RepublikeSrpske, 56 (2003).8. Hadživuković S: Statistički metodi, Univerzitet u Novom Sadu, Poljoprivrednifakultet, Novi Sad (1991).275
1 st WorkshopXIII International Feed Technology SymposiumCOMPARATIVE DETERMINATION OF SALINOMYCINECONTENT IN POULTRY FEED BY SPECTROPHOTOMETRICAND HPLC METHODLjiljana Kostadinović 1 , Jovanka Lević 2 , Sava Pavkov 31 Faculty of Biofarming, Megatrend University, Maršala Tita 39, 24300 Bačka Topola,Serbia2 Institute for Medicinal Plants Research “Dr Josif Pančić“, Tadeuša Košćuška 1,11000 Belgrade, Serbia3 Institute for food technology in Novi Sad, „FINS“, Bulevar cara Lazara 1, 21000 NoviSad, SerbiaABSTRACTThe paper presents the results of the efficiency of spectrophotometric methods comparedwith liquid chromatographic method (HPLC) for determination coccdiostaticsalynomicin in premixes and poultry feed. Salinomycine was extracted fromformulations and feed by our original method – column chromatography on the columnof silica gel G and elution with methanol. The content of salinomycin in eluates wasdetermined by spectrophotometric method at 520 nm with the vanilin reagens. Thedeveloped spectrophotometric method enables to determine the quantities of salinomycinin samples with detection limit of 0,5 mg/kg of feed. The recovery of spectrophotometricdetermination of salinomycin content in eluates was 83,8 and 103,5%, respectively. TheHPLC determination of salinomycine residues in prepared samples was accomplished bypost-column derivatisation with vanillin reagent and detection with VIS detector at 520nm. TSK ODS-120 T, 10µm (7,8 x 300mm) column and methanol-water-acetic acid(94:6:0.1, v/v/v) as mobile phase were used to determine SL. The recovery test wascarried out by adding standard solutions in concentrations from 10 to 60 ppm of feedsamples. The recovery rates for the HPLC method was over 96,3 and over 112,7%respectively. Detection limit of HPLC method was 15 µg/kg of feed.Key words: Salinomycine, spetrophotometry, liquid chromatography, poultry feedINTRODUCTIONCoccidiosis is an infective disease of the digestive tract which is most frequent withpoultry, causing a decrease in daily increment, prolonged fattening, poorer skinpigmentation, slower feed conversion and increased mortality. The disease is caused byProtozoas from the genera of Eimeria, Isospora and Cryptospora, and it is manifested bydamaging the intestine epithelial cells, less frequently the bile duct and renal tubuli [3,10].Worldwide intensive study of new products which would be added to poultry feed toprevented the coccidiosis, methods for their determination in premixes, finishedmixtures, as well as methods for the determination of their residues in tissues of treated276
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