A modified QuEChERS method for the determination of some herbicides in yogurt and milk by high performance liquid chromatography

作者：Li Na; Lei Lei; Nian Li; Zhang Rui; Wu Shuting; Ren Ruibing; Wang Yeqiang; Zhang Hanqi^*; Yu Aimin

来源：Talanta, 2013, 105: 219-228.

DOI：10.1016/j.talanta.2012.11.057

• A modified quick, cheap, effective, rugged, and safe (QuEChERS) method
• Milk
• Yogurt
• Triazine
• Phenylurea

A modified quick, easy, cheap, effective, rugged, and safe (QuEChERS) method was applied to the extraction of triazines and phenylureas from milk and yogurt. The herbicides was extracted by the mixture of ethyl acetate and n-hexane and cleaned by primary secondary amine (10 mg/mL). The frozen-out centrifugation was applied to further remove fatty. The proposed method can achieve efficient extraction and cleanup. Some experimental parameters, such as extraction method, extraction solvent and adsorbent, pH of sample solution, extraction time and amount of primary secondary amine and sodium chloride were investigated and optimized. The precision and absolute recoveries of eight herbicides vary from 0.07 to 5.86% and from 78.9 to 99.9%, respectively. The detection limits for simeton, monuron, chlorotoluron, simetryne, atrazine, karmex, ametryne and propazine range from 0.15 to 0.35 ng/mL.

• 出版日期2013-2-15
• 单位吉林大学