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Article ? AI-assigned paper type based on the abstract. Classification may not be perfect — flag errors using the feedback button. Tier 2 ? Original research — experimental, observational, or case-control study. Direct primary evidence. Detection Methods Gut & Microbiome Marine & Wildlife Remediation Sign in to save

A reliable method for the isolation and characterization of microplastics in fish gastrointestinal tracts using an infrared tunable quantum cascade laser system

Marine Pollution Bulletin 2022 30 citations ? Citation count from OpenAlex, updated daily. May differ slightly from the publisher's own count. Score: 40 ? 0–100 AI score estimating relevance to the microplastics field. Papers below 30 are filtered from public browse.
Verónica Fernández‐González, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, J.M. Andrade, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, J.M. Andrade, Adrián López-Rosales, Verónica Fernández‐González, Verónica Fernández‐González, J.M. Andrade, J.M. Andrade, J.M. Andrade, Verónica Fernández‐González, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, Adrián López-Rosales, Adrián López-Rosales, Adrián López-Rosales, Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Verónica Fernández‐González, Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Adrián López-Rosales, J.M. Andrade, J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Adrián López-Rosales, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Verónica Fernández‐González, Verónica Fernández‐González, Verónica Fernández‐González, J.M. Andrade, J.M. Andrade, Verónica Fernández‐González, Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Adrián López-Rosales, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Verónica Fernández‐González, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, J.M. Andrade, J.M. Andrade, J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Purificación López‐Mahía, Purificación López‐Mahía, Purificación López‐Mahía, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo J.M. Andrade, Soledad Muniategui‐Lorenzo J.M. Andrade, Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Soledad Muniategui‐Lorenzo Verónica Fernández‐González, J.M. Andrade, Soledad Muniategui‐Lorenzo

Summary

Researchers developed and validated a quantum cascade laser-based method for rapidly characterizing microplastics extracted from fish gastrointestinal tracts, addressing key sample processing challenges and accelerating the identification stage compared to conventional infrared spectroscopy.

Body Systems
Digestive

Societal and environmental concern due to frequent reports of microplastics in fish stomachs raised as they may accumulate along the trophic chain. The request for analysing microplastics in fish stresses two major analytical issues: sample treatment and final characterization. The, so far, workhorse for chemical characterization is infrared spectroscopy which is time-consuming. Here, a quantum cascade laser-based device is used to accelerate the characterization stage. Its novelty poses new challenges for sample processing and particle handling because the unknown particles must be transferred to a reflective slide. In this study, three sample digestion protocols (alkaline-oxidative with H<sub>2</sub>O<sub>2</sub>, and alkaline-oxidative with NaClO and enzymatic-oxidative) and three different procedures to transfer the filter cake to reflective slides are compared. A simplified enzymatic-oxidative digestion (validated through an interlaboratory exercise) combined with a Syncore® automatic evaporation system and a Laser Direct Infrared Imaging (LDIR) device is proposed first time as a reliable and relatively fast method to treat gastrointestinal tracts of fish. Analytical recoveries were studied using samples of Scomber scombrus and they were ca. 100% for big -i.e., >500 μm- and ca. 90% for medium -i.e., 200-300 μm- particles and ca. 75% for 10 μm thick fibres.

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