TY - JOUR
T1 - Reevaluation of microplastics identification based on Neuston net survey data
AU - Nakano, Haruka
AU - Uchida, Keiichi
AU - Aikawa, Tetsutaro
AU - Hayashi, Toshifumi
AU - Arakawa, Hisayuki
N1 - Funding Information:
This study was supported by the Environmental Research and Technology Development Fund (JPMEERF18S20208) of the Ministry of the Environment, Japan. A part of this study was supported by SATREPS of Japan International Cooperation Agency and Japan Science and Technology Agency.This research was partly supported by the Environment Research and Technology Development Fund (JPMEERF18S20208) of the Environmental Restoration and Conservation Agency of Japan. This research was partly supported by Science and Technology Research Partnership for Sustainable Development (SATREPS) in collaboration between Japan Science and Technology Agency (JST, JPMJSA1901) and Japan International Cooperation Agency (JICA). We thank Deanna E. Conners, Ph.D. from Edanz Group (https://en-author-services.edanz.com/ac) for editing a draft of this manuscript.
Funding Information:
This research was partly supported by the Environment Research and Technology Development Fund ( JPMEERF18S20208 ) of the Environmental Restoration and Conservation Agency of Japan . This research was partly supported by Science and Technology Research Partnership for Sustainable Development (SATREPS) in collaboration between Japan Science and Technology Agency (JST, JPMJSA1901) and Japan International Cooperation Agency (JICA). We thank Deanna E. Conners, Ph.D., from Edanz Group ( https://en-author-services.edanz.com/ac ) for editing a draft of this manuscript.
Funding Information:
This study was supported by the Environmental Research and Technology Development Fund ( JPMEERF18S20208 ) of the Ministry of the Environment , Japan. A part of this study was supported by SATREPS of Japan International Cooperation Agency and Japan Science and Technology Agency .
Publisher Copyright:
© 2021
PY - 2021/10
Y1 - 2021/10
N2 - To verify data accuracy regarding microplastics (MPs), the effects of chemical preprocessing and optical identification with Fourier transform infrared spectroscopy (FTIR) were examined using survey data. We aimed to clarify the cause of overestimation of the number concentration of MPs without FTIR by focusing on shape types. The proportion of fragments (foam) decreased (increased) after FTIR analysis. Although significant difference was found in terms of the size distribution of fragments (after FTIR > before FTIR), no such difference was found with regard to foam. These findings indicate that impurities categorized as fragments via visual confirmation, especially those measuring <1000 μm, were removed using the FTIR technique. Although previous studies recommended the use of data on MPs measuring >1000 μm, this threshold should be applied only to fragments and not to foam.
AB - To verify data accuracy regarding microplastics (MPs), the effects of chemical preprocessing and optical identification with Fourier transform infrared spectroscopy (FTIR) were examined using survey data. We aimed to clarify the cause of overestimation of the number concentration of MPs without FTIR by focusing on shape types. The proportion of fragments (foam) decreased (increased) after FTIR analysis. Although significant difference was found in terms of the size distribution of fragments (after FTIR > before FTIR), no such difference was found with regard to foam. These findings indicate that impurities categorized as fragments via visual confirmation, especially those measuring <1000 μm, were removed using the FTIR technique. Although previous studies recommended the use of data on MPs measuring >1000 μm, this threshold should be applied only to fragments and not to foam.
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U2 - 10.1016/j.marpolbul.2021.112799
DO - 10.1016/j.marpolbul.2021.112799
M3 - Article
C2 - 34365283
AN - SCOPUS:85111905166
VL - 171
JO - Marine Pollution Bulletin
JF - Marine Pollution Bulletin
SN - 0025-326X
M1 - 112799
ER -