Holden E R
J Assoc Off Anal Chem. 1975 May;58(3):562-5.
Eight laboratories tested the 2,4-dinitrophenyl ether method for determining carbamate pesticide residues by gas-liquid chromatography. Propoxur, carbofuran, carbanolate, and carbaryl in apples, corn, green beans, and a leafy vegetable (kale, collards, cabbage, or turnip greens) were determined at the fortification levels of 0.1, 0.2, and 0.5 ppm. Average recoveries of propoxur were 87-95%; carbofuran, 87-100%; carbanolate, 89-102%; and carbaryl, 77-92%. No serious background problems were encountered, other than that from field-incurred carbaryl residues in apples. The study revealed the need for certain precautions in determining carbaryl because of its instability in analytical operations. The method has been adopted as official first action.
八个实验室对通过气液色谱法测定氨基甲酸酯类农药残留的2,4-二硝基苯醚法进行了测试。在苹果、玉米、四季豆和一种叶菜类蔬菜（羽衣甘蓝、羽衣甘蓝、卷心菜或芜菁叶）中，对残杀威、克百威、卡巴立和西维因在0.1、0.2和0.5 ppm的强化水平下进行了测定。残杀威的平均回收率为87-95%；克百威为87-100%；卡巴立为89-102%；西维因为77-92%。除了苹果中因田间产生的西维因残留外，未遇到严重的背景问题。该研究表明，由于西维因在分析操作中不稳定，在测定西维因时需要采取某些预防措施。该方法已被采用为官方首次行动方法。
