Determination of Copper-Based Fungicides by Flame Atomic Absorption Spectrometry Using Digestion Procedure with Sulfuric and Nitric Acid
Određivanje bakarnih fungicida metodom plamene atomske apsorpcione spektrometrije primenom digestije sumpornom i azotnom kiselinom
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Author
Milinovic, Jelena
Djurovic, Rada
Keywords
Copper fungicidesDigestion procedure (H2SO4 + HNO3)
Copper determination
Flame atomic absorption spectrometry (AAS)
Fungicidi na bazi bakra
vlažna digestija (H2SO4 + HNO3);
odreðivanje bakra
plamena atomska apsorpciona spektrometrija (AAS)
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Show full item recordAbstract
Copper-based fungicides can be effectively digested by treatment with a mixture of
concentrated sulfuric and nitric acid in exactly 15 minutes for the rapid determination via
copper using flame atomic absorption spectrometry (AAS). Under optimum conditions,
the results of copper fungicide analysis were consistent to those obtained by the AOAC’s
recommended method. Recovery values ranged from 98.63 to 103.40%. Relative standard
deviation values are lower than 2%. The proposed digestion procedure applied for determination
of copper ranged from 100 to 594 g Cu kg-1 in different commercial fungicide
products. Fungicidi na bazi bakra se uspešno mogu određivati plamenom atomskom apsorpcionom
spektrometrijom praćenjem apsorpcije bakra, nakon digestije uzoraka koncentrovanom
sumpornom i azotnom kiselinom u toku 15 minuta. Pod optimalnim uslovima, rezultati
analize su u saglasnosti sa onima dobijenim zvaničnom AOAC metodom, s tim što su
vrednosti prinosa u užem intervalu (98.63 do 103.40%) u odnosu na odgovarajuće vrednosti
dobijene AOAC metodom. Vrednosti relativne standardne devijacije su manje od 2%.
Predloženi postupak digestije se može primeniti za određivanje uzoraka bakarnih fungicida
koji sadrže od 100 do 594 g Cu kg-1.