Detection of microplastics in fetal organs of aborted Korean native cattle (Bos taurus coreanae)
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초록
Although microplastics (≤5 mm) are widely detected across environmental matrices, in vivo data for Korean livestock (Bos taurus coreanae , Hanwoo) are scarce. This study investigated the presence of microplastics in organs from aborted Hanwoo fetuses to provide baseline information relevant to food safety and animal health. In April 2024, seven aborted Hanwoo fetuses from farms in Chungcheongbuk- do following Foot-and-mouth disease (FMD) vaccination were necropsied. Five organs (brain, lung, kidney, liver, and heart) were sampled (50 g each; 35 samples total). Tissues were digested in 10% KOH at 40℃ for one week, the digests were filtered through 0.45 µm hydrophilic PTFE membrane filters, and two positions per filter were interrogated by fourier-transform infrared spectroscopy (FTIR) to screen for polymer-characteristic bands (e.g., PE, PP, PS). Basic contaminationcontrol measures and negative controls were included. No polymer-specific spectra were detected by FTIR in any organ sample. Considering the typical lower size limits for reliable FTIR-based particle identification (approximately 10∼20 µm) and the present preparation/measurement conditions, these findings support non-detection of particles ≥20 µm, while the presence of smaller microplastics or nanoplastics cannot be excluded. In this first survey of organs from aborted Hanwoo fetuses in Korea, common microplastics ≥20 µm were not detected. Future work should expand sample types (e.g., placenta) and integrate complementary techniques optimized for <20 µm and nanoscale detection— such as Raman spectroscopy mapping and pyrolysis GC/MS within a multi-indicator framework.
Abstract
Although microplastics (≤5 mm) are widely detected across environmental matrices, in vivo data for Korean livestock (Bos taurus coreanae , Hanwoo) are scarce. This study investigated the presence of microplastics in organs from aborted Hanwoo fetuses to provide baseline information relevant to food safety and animal health. In April 2024, seven aborted Hanwoo fetuses from farms in Chungcheongbuk- do following Foot-and-mouth disease (FMD) vaccination were necropsied. Five organs (brain, lung, kidney, liver, and heart) were sampled (50 g each; 35 samples total). Tissues were digested in 10% KOH at 40℃ for one week, the digests were filtered through 0.45 µm hydrophilic PTFE membrane filters, and two positions per filter were interrogated by fourier-transform infrared spectroscopy (FTIR) to screen for polymer-characteristic bands (e.g., PE, PP, PS). Basic contaminationcontrol measures and negative controls were included. No polymer-specific spectra were detected by FTIR in any organ sample. Considering the typical lower size limits for reliable FTIR-based particle identification (approximately 10∼20 µm) and the present preparation/measurement conditions, these findings support non-detection of particles ≥20 µm, while the presence of smaller microplastics or nanoplastics cannot be excluded. In this first survey of organs from aborted Hanwoo fetuses in Korea, common microplastics ≥20 µm were not detected. Future work should expand sample types (e.g., placenta) and integrate complementary techniques optimized for <20 µm and nanoscale detection— such as Raman spectroscopy mapping and pyrolysis GC/MS within a multi-indicator framework.