Objective Developing a method for determination of residues of tetracyclines, oxytetracycline, chlortetracycline and metacycline in the milk.

• 目的建立牛奶样品中四环素、土霉素、金霉素、美他环素药物残留量的测定方法,进一步探讨四环素类药物的电喷雾质谱规律。