摘要
Liquid chromatography (LC)–atmospheric pressure ionisation (API)–mass spectrometry (MS) has been used to determine residues of five fungicides in oranges with a minimum sample cleanup. Atmospheric pressure chemical ionisation (APCI) and electrospray (ES) were compared and both gave similar results in terms of sensitivity and structural information. The main ions were [M+H]+for carbendazim, imazalil, thiophanate methyl and thiabendazole, and [M+H–C4H9NHCO]+ for benomyl. Samples were extracted with sodium sulphate and ethyl acetate. Although benomyl and thiophanate methyl were transformed through the extraction procedure to carbendazim, the method showed good precision (<13%) and recovery (>70%), except for thiophanate methyl (50%), whilst also yielding limits of detection (<0.03 mg kg−1) that are adequate for the determination of the studied fungicides in oranges.
摘要译文
液相色谱（LC） - 大气压电离（API）搈搈搈搈搈（（（（（in in 比较，两者在敏感性和结构信息方面都得到了类似的结果。主要离子是多菌灵，咪达唑仑，甲基硫菌灵甲基和噻菌灵的[M + H] sup + / sup，[M + H] 9 NHCO] sup + / sup用硫酸钠和乙酸乙酯萃取样品。尽管苯菌灵和甲基托布津甲基通过提取程序转化为多菌灵，该方法显示出良好的精度（13％25）和回收率（ 70％25），除了甲基托布津甲基（50％25）外，还产生了足够的检测限（0 mgkg sup鈭 ）
M Fernández; R Rodrı́guez; Y Picó; J Mañes. Liquid chromatographic–mass spectrometric determination of post-harvest fungicides in citrus fruits[J]. Journal of Chromatography A, 2001,912(2): 301–310