Trace Determination of Lead,Chromium and Cadmium in Herbal Medicines Using Ultrasound‐Assisted Emulsification Microextraction Combined with Graphite Furnace Atomic Absorption Spectrometry
1. Department of Chemistry, Boroujerd Branch, Islamic Azad University, Boroujerd, Iran;2. Department of Marine Living Resources, Iranian National Institute for Oceanography, Tehran, Iran