Abstract
Aqueous soluble arsenic species in Atlantic edible seaweeds have been quantified by high performance liquid chromatography-inductively coupled plasma mass spectrometry (HPLC-ICP-MS). A pressurized high-temperature water extraction (PHWE) method has been developed for arsenic species. The significance of several parameters involved in the arsenic species extraction by PHWE has been evaluated using a Plackett-Burman experimental design. The extraction temperature and modifier amounts were optimized by using the central composite design. The extraction procedure was completed within 7 minutes. The analytical performance of the method, such as limit of quantification (in the range of 47 to 101 ng g-1), repeatability (<18%), column recoveries (in the range of 44 to 99%), and extraction efficiency (in the range of 32 to 81%), was established. The developed method was applied to the arsenic speciation in several edible seaweeds such as Dulse, Nori, Kombu, Wakame, Sea Spaghetti, as well as canned seaweed, and verified by analyzing the certified reference material BCR-279 Sea Lettuce.
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