Low cost sample preparation method using ultrasound for the determination of environmentally critical elements in seaweed.

ABSTRACT: In this study, ultrasound (US) was evaluated for As, Cd, Pb, Mn, Sr and V extraction from seaweed samples. The following parameters of ultrasound-assisted extraction (UAE) using an US bath were: frequency (25 to 130 kHz), amplitude (30 to 100%), temperature (30 to 80 °C), sample mass (50 to 200 mg), extractant concentration (1 to 3 mol L^-1 of HNO₃) and treatment time (5 to 30 min). Acoustic density and power density distribution were calculated using the calorimetric method and mapping of the acoustic pressure distribution was also evaluated. The optimized UAE conditions were 200 mg of sample in 10 mL of 2 mol L^-1 HNO₃ and 30 min of sonication in a 25 kHz US bath (37.2 ± 4.0 W L^-1) at 70% of amplitude and 70 °C. Analytes were quantifie

SUBMITTER: Gohlke G 

PROVIDER: S-EPMC10848136 | biostudies-literature | 2024 Jan

REPOSITORIES: biostudies-literature