Importance of boron for human and plant and determination of boron in some variates

ABSTRACTMSc THESISIMPORTANCE OF BORON FOR HUMAN AND PLANT ANDDETERMINATION OF BORON IN SOME GRAPE VARIETESBurcu SAYGIDEĞER DEMİRDEPARTMENT OF CHEMISTRYINSTITUE OF NATURAL AND APPLIED SCIENCESUNIVERSITY OF ÇUKUROVASupervisor : Prof. Dr. Osman SERİNDAĞYear : 2005 Page : 57Jury : Prof. Dr. Osman SERİNDAĞAssoc.Prof. Bilgehan GÜZELProf. Dr. Zülküf KAYABoron is a trace mineral that is found in many plants and considered anessential ultratrace element in the diet of humans. Boron supplement is necessary forhuman metabolism.Boron content of 10 grape (Vitis vinifera) varietes was determined by usingAzometin H. Spectrophotometric method. The grape samples have been taken fromAdana (Pozantı) and Niğde (Kemerhisar) regions.The method for the spectrophotometric determination of micro amounts ofboron in grapes based on the boron-catalyzed condensation of salicylaldehyde withH-acid. Under the optimum conditions, the absorbency of the yellow complex at 412nm increases linearly with concentration of boron (III).Consequently, the differences have been found in boron content of 10 grapesamples.Key Wors: Azomethin H., Vitis vinifera, determination of boron, boron in grapes.II