Abstract
Microplastic particles have been detected in the human body.This study aimed to develop a blood digestion method that preserves microplastics during analysis.Acidic and alkaline reagents, commonly used for isolating plastic particles from organic materials, were tested on human blood samples and microplastics. Nitric acid, hydrochloric acid, potassium hydroxide, and sodium hydroxide were examined over time. Additionally, a pepsin-pancreatin combination was utilized for blood digestion. Light microscopy assessed digestion efficiency and particle count changes, while Raman microspectroscopy distinguished between plastic and cell debris.The acidic reagents were ineffective in removing the organic material, while alkaline reagents were effective without significant effects on microplastics. Blood digestion using pepsin and pancreatin demonstrated efficient digestion without negative consequences for the particles.While potassium hydroxide digestion is already established, novel use of the pepsin-pancreatin combination was introduced to digest human blood, indicating its potential for isolating plastic particles from tissue and human food.
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