The power of ultrasound / Hugo Miguel Santos, Carlos Lodeiro, and José-Luis Capelo-Martínez -- Ultrasonic energy as a tool for sample treatment for the analysis of elements and elemental speciation / Hugo Miguel Santos, Carlos Lodeiro, and José-Luis Capelo-Martínez -- Ultrasonic assisted extraction for the analysis of organic compounds by chromatographic techniques / Raquel Rial-Otero -- Electrochemical applications of power ultrasound / Neil Vaughan Ress and Richard Guy Compton -- Power ultrasound meets protemics / Hugo Miguel Santos, Carlos Lodeiro, and José-Luis Capelo-Martínez -- Beyond analytical chemistry / Carlos Lodeiro and José-Luis Capelo-Martinez.