FN Archimer Export Format PT J TI Identification and Quantification of Microplastics in the Marine Environment Using the Laser Direct Infrared (LDIR) Technique BT AF Ourgaud, Mélanie Phuong, Nam Ngoc Papillon, Laure Panagiotopoulos, Christos Galgani, Francois Schmidt, Natascha Fauvelle, Vincent Brach-Papa, Christophe Sempéré, Richard AS 1:1;2:1,2;3:1;4:1;5:3;6:1;7:1;8:3;9:1; FF 1:;2:;3:;4:;5:PDG-ODE-LITTORAL-LERPAC;6:;7:;8:PDG-ODE-LITTORAL-LERPAC;9:; C1 Aix-Marseille University, Toulon University, CNRS, IRD, M I O, Marseille 13007, France PhuTho College of Medicine and Pharmacy, 2201 Hung Vuong Boulevard, Viettri City, PhuTho Province 290000, Viet Nam Laboratoire Environnement Ressources, Provence-Azur-Corse, IFREMER, Centre Méditerranée, Zone Portuaire de Brégaillon, CS20 330, 83507, La Seyne-sur-Mer Cedex, France C2 UNIV AIX MARSEILLE, FRANCE PHUTHO COLL MEDICINE PHARMACY, VIETNAM IFREMER, FRANCE SI CORSE TOULON SE PDG-ODE-LITTORAL-LERPAC IN WOS Ifremer UPR copubli-france copubli-univ-france copubli-int-hors-europe copubli-sud IF 11.4 TC 34 UR https://archimer.ifremer.fr/doc/00779/89090/94724.pdf LA English DT Article DE ;Microplastics;LDIR;detection;seawater;sediment;marine organisms AB Here, we evaluate for the first time the performances of the newly developed laser direct infrared (LDIR) technique and propose an optimization of the initial protocol for marine microplastics (MPs) analysis. Our results show that an 8 μm porosity polycarbonate filter placed on a Kevley slide enables preconcentration and efficient quantification of MPs, as well as polymer and size determination of reference plastic pellets of polypropylene (PP), polyethylene (PE), polystyrene (PS), polyvinyl chloride (PVC), and polyethylene terephthalate (PET), with recoveries ranging from 80–100% and negligible blank values for particle sizes ranging from 200 to 500 μm. A spiked experiment using seawater, sediment, mussels, and fish stomach samples showed that the method responded linearly with significant slopes (R2 ranging from 0.93–1.0; p < 0.001, p < 0.01). Overall, 11 polymer types were identified with limited handling and an analysis time of ca. 3 h for most samples and 6 h for complex samples. Application of this technique to Mediterranean marine samples (seawater, sediment, fish stomachs and mussels) indicated MP concentrations and size distribution consistent with the literature. A high predominance of PVC (sediment, fish stomachs) and PE and PP (seawater, mussels) was observed in the analyzed samples. PY 2022 PD JUN SO Environmental Science & Technology SN 0013-936X PU American Chemical Society (ACS) VL 56 IS 14 UT 000818805100001 BP 9999 EP 10009 DI 10.1021/acs.est.1c08870 ID 89090 ER EF