فهرس المقالات Ultrasound assisted emulsification microextraction حرية الوصول المقاله صفحة الملخص نص كامل 1 - Ultrasound Assisted Emulsification Microextraction as a Simple Preconcentration Method for Determination of Atrazine in Environmental Samples Sana Berijani Mohsen Zeeb Elham Pournamdari