biostudies-literatureAlvarez-Vinas MXunta de GaliciaMinistry of Science and Innovation Spain83https://www.ebi.ac.uk/biostudies/studies/S-EPMC9961692biostudies-literatureUnknown21(2)The development of greener processes for the sustainable utilization of raw materials is increasingly demanded for environmental and economic reasons. A rapid and chemical-free technique was proposed for the extraction of hybrid kappa/iota (6/4) carrageenan from <i>Sarcopeltis</i> (<i>ex Gigartina</i>) <i>skottsbergii</i>. After separation, carrageenans were analyzed by Fourier transform infrared attenuated total reflectance, high-performance size-exclusion chromatography, and rheology. Maximum carrageenan extraction yields up to 63-64% were obtained operating at 110 or at 160 °C, for 5-7 min considering the sum of the heating and cooling periods, but the extraction of the phenolic fraction was favored at 220 °C. The recovered carrageenan showed apparent viscous values around 10<sup>3</supMarine drugsMicrowave-Assisted Extraction of Carrageenan from <i>Sarcopeltis skottsbergii</i>.PMC9961692RTI2018-096376- BI00ED431C 2018/54 GRC and ED431G2019/06Alvarez-Vinas MDominguez HTorres MDRivas SfalseMicrowave-Assisted Extraction of Carrageenan from <i>Sarcopeltis skottsbergii</i>.The development of greener processes for the sustainable utilization of raw materials is increasingly demanded for environmental and economic reasons. A rapid and chemical-free technique was proposed for the extraction of hybrid kappa/iota (6/4) carrageenan from <i>Sarcopeltis</i> (<i>ex Gigartina</i>) <i>skottsbergii</i>. After separation, carrageenans were analyzed by Fourier transform infrared attenuated total reflectance, high-performance size-exclusion chromatography, and rheology. Maximum carrageenan extraction yields up to 63-64% were obtained operating at 110 or at 160 °C, for 5-7 min considering the sum of the heating and cooling periods, but the extraction of the phenolic fraction was favored at 220 °C. The recovered carrageenan showed apparent viscous values around 10<sup>3</sup2023-01-01T00:00:00Z2023 Jan2025-05-29T22:23:08.804Z2025-05-29T22:23:08.804ZS-EPMC99616923682712410.3390/md21020083