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128th General Meeting of Korean Chemical Society The risk of dermal exposure of BPA-free materials

Submission Date :
8 / 31 / 2021 , 16 : 56 : 52
Abstract Number :
Presenting Type:
Oral Presentation
Presenting Area :
Analytical Chemistry - Oral Presentation of Young Analytical Chemists II
Authors :
Min Jang
Center for Bio-based Chemistry, Korea Research Institute of Chemical Technology, Korea
Assigned Code :
ANAL2.O-12 Assigend Code Guideline
Presenting Time :
FRI, 10 : 06

Bispheonl A (BPA) is still being found in a wide array of manufactured products including thermal papers, plastic water bottles, canned foods, and pacifiers despite reported toxicity of BPA to human beings. BPA is also a frequently used monomer in engineering plastics. Therefore, consistent requests of BPA replacement have been surged. Bisphenol S (BPS) is one of replacements and BPS containing materials (receipts and colored papers) are sold in the market labeled as BPA-free. However, is it actually safe? This research reported that BPS is present in BPA-free labeled materials with enormous amount (10000 and 500 μg/g, respectively). Since they are handled by human beings in daily basis, BPS can be transferred to human skin. Our newly developed liquid chromatography mass spectrometry (LC-MS) method qualitatively and quantitatively detected BPS (5 to 26 μg/g) as well as BPA (28 to 89 μg/g) in fingerprints. Furthermore, using a matrix assisted laser desorption ionization mass spectrometry image (MALDI-MSI) method confirmed visually the presence of BPS in a fingertip after a receipt handled, and that presence of sufficient oily materials without handwashing can pick up more amount of BPS than with handwashing. The level of BPS in fingerprints was then applied to the toxicity test using water flea. As a result, chronic exposure to BPS in spite of low concentration still adversely influenced on the birth and health of water flea. It means that chronic handle of BPA-free materials can be a big threat to the health system.