Lead and chromium contamination represents one of the most serious problems in the aquatic environments. 'e aim of this\nwork was to develop and validate an accurate, sensitivity, and rapid method for the simultaneous determination of Pb and Cr at\ntrace levels in tissues and fat of marine organisms such as turtle (Chelonia mydas), shark (Rhizoprionodon terraenovae), and\ndolphin (Tursiops truncatus), utilizing the total reflection X-Ray fluorescence (TXRF) spectroscopy. Working solutions were\nprepared in 10mL of a solution...........................................
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