New method for extraction, identification, and quantification of non-intentionally added substances in polystyrene

IF 3.8 4区 工程技术 Q2 CHEMISTRY, APPLIED
Sacha Pérocheau Arnaud, Véronique Michelet, Sandra Olivero, Patrick Navard, Christelle Combeaud, Alice Mija
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Abstract

An efficient one-step extraction method was developed for the recovery of additives and non-intentionally added substances (NIAS) from polystyrene, performed at room temperature for 2.33 h, without grinding to avoid fostering the formation of NIAS unrelated to polymer processing. Solvent use (39.2 mL/g) was greatly reduced compared with extraction conditions previously reported. The study of NIAS is analytically challenging but with high importance since their presence is a potential threat to human health and to the environment while reducing plastic potential recyclability. For an understanding of NIAS formation and influence of processing parameters, a systematic approach was taken, using virgin polystyrene mixed with known quantities of standard additives as model materials (Irganox_1076, Tinuvin_326, Irgafos_168). The degradation of one additive was identified by NMR and GC–MS. Precise multiple-point quantification with internal standard was performed by GC–MS, measuring a 5.1 wt% Irgafos_168 degradation, with additives LOD ranging from 0.55–0.95 ppm. Evaluation of analytical challenges, such as matrix effects, was discussed and quantified. This method will help the quality control of virgin and recycled PS materials, including food contact ones, and improve the knowledge of PS processing impact on NIAS formation.

Abstract Image

聚苯乙烯中非故意添加物质的提取、鉴定和定量新方法
建立了一种从聚苯乙烯中提取添加剂和非故意添加物质(NIAS)的高效一步萃取方法,该方法在室温下进行2.33 h,无需研磨,以避免形成与聚合物加工无关的NIAS。与先前报道的提取条件相比,溶剂用量(39.2 mL/g)大大减少。对NIAS的研究在分析上具有挑战性,但具有高度重要性,因为它们的存在对人类健康和环境构成潜在威胁,同时降低了塑料的可回收性。为了了解NIAS的形成和加工参数的影响,采用了系统的方法,使用未加工的聚苯乙烯与已知数量的标准添加剂混合作为模型材料(Irganox_1076, Tinuvin_326, Irgafos_168)。通过NMR和GC-MS鉴定了其中一种添加剂的降解。内标采用GC-MS进行精确多点定量,测定了5.1%的Irgafos_168降解,添加剂LOD范围为0.55-0.95 ppm。分析挑战的评价,如矩阵效应,进行了讨论和量化。该方法将有助于对原生和再生PS材料的质量控制,包括与食品接触的PS材料,并提高对PS加工对NIAS形成影响的认识。
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来源期刊
Journal of Vinyl & Additive Technology
Journal of Vinyl & Additive Technology 工程技术-材料科学:纺织
CiteScore
5.40
自引率
14.80%
发文量
73
审稿时长
>12 weeks
期刊介绍: Journal of Vinyl and Additive Technology is a peer-reviewed technical publication for new work in the fields of polymer modifiers and additives, vinyl polymers and selected review papers. Over half of all papers in JVAT are based on technology of additives and modifiers for all classes of polymers: thermoset polymers and both condensation and addition thermoplastics. Papers on vinyl technology include PVC additives.
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