OLIVE PITS-BASED CARBON BLACK AGGLOMERATE AS AN ADSORBENT FOR PIPETTE-TIP SOLID-PHASE EXTRACTION FOR THE DETERMINATION OF CAFFEINE IN ENERGY DRINKS by ROSALES GÓMES, ASHLY A., RAMOS DOBLADO, AXEL M., CALLEJAS TABORA, MARÍA F., ZELAYA NASSER, SUANY Y., RODRÍGUEZ-RIVAS, FREDY A., PONCE-RODRIGUEZ, HENRY DANIEL, CABALLERO, ÁLVARO, DOMÍNGUEZ-ROBLES, JUAN

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