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Determination of Antimony in Recycled Polyester Fiber by ICP-OES with Different Pretreatment Methods

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Abstract:

As consumer awareness of heavy metal content in textile increased, it is necessary to develop analytical methods that identify and quantify heavy metals. In order to comprehensively investigate the potential risks of antimony (Sb) in recycled polyester fiber to humans health, this study developed acid digestion method, with the condition that the volume ratio of concentrated sulfuric acid to hydrogen peroxide was 1, and digested at 200°Cfor 1.5h, which produced clear and colorless solutions.Currently, microwave and dry ashing are also common methods for digesting polyethylene terephthalate samples. Three pretreatment methods for determining the content of Sb in recycled polyester fibers was evaluated. Results showed that inductively coupled plasma-optical emission spectrometry (ICP-OES) analysis of acid digested recycled polyester samples resulted in Sb content higher than for the microwave and dry ashing digestion methods which incompletely digest recycled polyester. Moreover, compared with microwave digestion and dry ashing, acid digestion had a low detection limit of 0.0116 ug/mL, a high spike recovery of 82% to 106% and the RSD value less than 2%, which indicates that the data was accurate and reproducible. Therefore, in this study, acid digestion - ICP-OES was an effective method for detecting the content of heavy metal Sb in recycled polyester.

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Periodical:

Materials Science Forum (Volume 993)

Pages:

1502-1510

DOI:

https://doi.org/10.4028/www.scientific.net/MSF.993.1502

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Online since:

May 2020

Authors:

Ling Ling Gao, Ye Chen*, Ning Wang, Shan Shan Liu, Yu Hui Wang, Fu You Ke, Chao Sheng Wang, Hua Ping Wang

Keywords:

Antimony (Sb), Digestion, ICP-OES, Recycled Polyester Fiber

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© 2020 Trans Tech Publications Ltd. All Rights Reserved

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