Incidence Study of Two UV Filters (Octocrylene and Octinoxate) and the Synthetic Fragrance Galaxolide in Commercial Yellow Clam (Amarilladesma mactroides)

In this work, we study two UV filters (octocrylene and octinoxate) and the synthetic fragrance galaxolide in the yellow clam (Amarilladesma mactroides). Two beaches were strategically selected based on their contrasting population density, level of tourism and recreational activity. The clam samples used in this study originate from two distinct subpopulations. Samples from each beach were separated into 4 sizes (<54 mm, 55-56 mm, 57-58 mm and >59 mm); then, a modified citrate buffered QuEChERS method was used for subsequent evaluation in gas chromatography-mass spectrometry (GC-MS). The recoveries for all analytes were in the range between 70 to 102%, the RSD oscillated between 1 to 18%, and the limit of quantification was defined as the lowest recovery level with a value of 50 µg Kg-1 for all three analytes. As a result, the presence of the UV filter octinoxate was detected in the size of 55-56 mm on Barra Puimayen beach, being lower than the limit of quantification (50 µg Kg-1). However, the evaluation indicated the absence of analytes from the individuals belonging to La Maciega beach, which presents a minimal anthropogenic impact.