Maduro, C Determination of Cd and Pb in biological reference materials by electrothermal atomic absorption spectrometry: A comparison of three ultrasonic-based sample treatment procedures. [electronic resource] - Talanta Feb 2006 - 1156-61 p. digital Publication Type: Journal Article ISSN: 1873-3573 Standard No.: 10.1016/j.talanta.2005.07.020 doi