Analysis of pesticide residues in sugarcane juice using QuEChERS sample preparation and gas chromatography with electron capture detection

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• 作者：Regina Prado Zanes Furlani^a ; ^{rfurlani@ital.sp.gov.br} ; Kassia Maria Marcilio^b ; Fernanda Moralez Leme^a ; Silvia Amelia Verdiani Tfouni^a
• 关键词：QuEChERS ; Pesticide ; Sugarcane juice ; GC– ; ECD
• 刊名：Food Chemistry
• 出版年：2011
• 出版时间：1 June 2011
• 年：2011
• 卷：126
• 期：3
• 页码：1283-1287
• 全文大小：262 K

文摘

QuEChERS sample preparation was used for the determination of 7 pesticides residues in 80 samples of sugarcane juice collected from two Brazilian cities, in two different periods. The method involved extraction with acetonitrile, liquid–liquid partition with addition of MgSO₄ and NaCl followed by dispersive SPE cleanup with PSA sorbent and the analyses were carried out with a GC–ECD equipment. The method was validated using sugarcane juice spiked at 0.025, 0.10 and 0.20 mg/L and the average recovery by the method varied from 62.9 % to 107.5 % with RSDs < 18 % . The method showed good linearity and the LODs for the pesticides studied ranged from 0.003 to 0.04 mg/L. No pesticide residue was detected (>LOD) amongst the 80 samples analysed.