An alternative LC-UV procedure for the determination of prochloraz residues in fruits

Journal of the Brazilian Chemical Society

Universidade Federal de Sergipe, São Cristóvão, Brazil¹  Navickiene, Sandro¹  Ribeiro, Maria Lúcia¹  Universidade Estadual Paulista, Araraquara, Brazil¹ 

关键词: fruit;    food analysis;    prochloraz;    fungicides;    pesticides;    derivatization;   

DOI  :  10.1590/S0103-50532005000200006

学科分类：化学（综合）

来源: SciELO

【 摘 要 】

An alternative method using liquid chromatography with UV detection for the determination of prochloraz as 2,4,6-trichlorophenol in mango, papaya and orange is described. Ethyl acetate, acetone and dichloromethane were tested for extraction of prochloraz from the fruits. After extraction the residue of prochloraz was derivatized with pyridine hydrochloride. The analysis was carried out using liquid chromatography with UV detection and gas chromatography with electron-capture detection. Average recoveries of prochloraz from spiked fruits (0.1 and 0.2 mg kg-1) ranged from 80% to 94% with relative standard deviations between 5.6% and 12.6% (n=8). Detection and quantification limits were 0.05 and 0.1 mg kg-1, respectively. The LC-UV method was applied to mango and papaya samples submitted to dip treatment with a prochloraz formulation under laboratory conditions. In addition, fruit samples obtained from local markets were analysed.

【 授权许可】

Unknown