摘要
试样经1%三氯乙酸-二甲基亚砜提取,Waters Oasis MCX柱净化,电喷雾串联四级杆质谱进行检测。本方法检测三聚氰胺、环丙氨嗪的线性范围为10～5000μg/kg,线性相关系良好(r>0.99);在10～100μg/kg的添加水平范围内的平均回收率为86%～98%;相对标准偏差为3.8%～7.5%;方法检出限为10μg/kg。
A fast method for determination of melamine and cyromazine residues in milk and dairy products was established in this paper. The samples were extracted by 1% trichloroacetic acid-dimethyl sulfoxide, purified by Waters Oasis MCX column and then analyzed by a liquid chromatography coupled to electrospray ionization quadmpole tandem mass spectrometry. The residues were quantified with multiple reactions monitoring （MRM） mode. The linear ranges of melamine and cyromazine were of 10-5000 μg/kg （r 〉0.99） with thedetection limit of the residues being of 10 μg/kg. Within the range of 10-100 μg/kg, the recovery and RSD of the method were 86%-98% and 3.8%-7.5%, respectively. Due to its high precision, repeatability and spiked recovery, this method can be applied for the determination of melamine and cyromazine residues in milk and dairy products.
出处
《现代食品科技》
EI
CAS
2008年第10期1058-1060,1015,共4页
Modern Food Science and Technology
