Current scientific methods for detecting tiny plastic particles in human blood cannot reliably find particles smaller than 300 nanometers because they are lost during testing, and the amounts...
Mechanism
Synthesis from 1 study
Tiny plastic particles in blood get lost or hidden during lab testing because they stick to equipment or blend in with natural blood substances. Even when signals appear, they suggest people are swallowing far more plastic daily than is physically possible, meaning the detections are likely false.
Most probable mechanism
When blood is processed to look for tiny plastic particles, the smallest ones get stuck on equipment or mixed in with natural substances in the blood, making them impossible to detect. Even if some particles are found, the numbers would mean a person swallowed way more plastic every day than is physically possible.
Polymer particles smaller than 300 nm are physically retained or adsorbed onto filtration membranes and container surfaces during sample preparation.
Endogenous blood components such as proteins, lipids, and cellular debris bind to small polymer surfaces, masking their chemical signatures and interfering with thermal and chromatographic separation.
Pyrolysis-gas chromatography-mass spectrometry cannot distinguish polymer fragments from naturally occurring organic compounds with similar molecular weights and thermal degradation profiles.
Reported concentrations of detectable polymers imply daily ingestion rates that exceed plausible environmental exposure limits based on known human intake pathways.
Evidence from Studies
Supporting (1)
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Assessing the Efficacy of Pyrolysis–Gas Chromatography–Mass Spectrometry for Nanoplastic and Microplastic Analysis in Human Blood
Contradicting (0)
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