List of Articles Environmental Samples Open Access Article Abstract Page Full-Text 1 - Determination of Nickel in Environmental Samples by Flotation Spectra-photometric Method using Dimethyl Glyoxime Mohammad Hadi Givianrad Amir Hossein Haghighaty Open Access Article Abstract Page Full-Text 2 - Ultrasound Assisted Emulsification Microextraction as a Simple Preconcentration Method for Determination of Atrazine in Environmental Samples Sana Berijani Mohsen Zeeb Elham Pournamdari