Assessing the effectiveness of microplastic extraction methods on fishmeal with different properties.
Assessing the effectiveness of microplastic extraction methods on fishmeal with different properties.
复制标题
评估微塑料提取方法对不同特性鱼粉的有效性。
DOI：
10.1039/d1ay02154k
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发表时间：
2022
期刊：
影响因子：
--
通讯作者：
Way C
中科院分区：
文献类型：
--
作者：
Way C
鱼粉中的微塑料是一个新兴的研究领域，因为它有进入食物链的潜力，以及鱼粉在全球粮食安全中的重要性。然而，鱼粉是一种复杂的介质，取决于鱼的成分。这项研究测量了来自世界各地（挪威、南美洲、南极洲、西班牙和苏格兰）的五种鱼粉（边角料、沙丁鱼和凤尾鱼、磷虾、金枪鱼和鲑鱼）的特性（有机物、碳酸盐、蛋白质和密度）。比较了使用氯化钠溢流和氢氧化钾消解的现有方法的微塑料回收率，然后与新开发的方法进行比较。这些方法包括分散剂和氯化钙密度分离，这些方法的开发和设计具有环保意识且价格实惠，我们认为这应该成为研究人员的国际标准方法。使用分散剂和氢氧化钾消化的氯化钙溢流在沙丁鱼和凤尾鱼鱼粉中提供了最高的回收率（66.3%）。蛋白质含量与回收率呈正相关，与有机物含量呈负相关。这里发现的低回收率表明文献中报道的鱼粉中的微塑料被低估了。对于鱼粉等复杂介质，在选择方法和解释结果时必须注意类型和成分之间的差异。
Microplastic presence in fishmeal is an emerging research area because of its potential to enter food chains, and the importance of fishmeal within global food security. However, fishmeal is a complex medium dependant on fish composition. This study measured properties (organics, carbonates, protein and density) of five fishmeal types (trimmings, sardine and anchovy, krill, tuna and salmon), sourced from locations worldwide (Norway, South America, Antarctica, Spain and Scotland). Microplastic recovery rates were compared for existing methodologies using sodium chloride overflows and potassium hydroxide digestions and then compared to newly developed methods. These methods included dispersants and calcium chloride density separations which were developed and designed to be environmentally conscious and affordable, which we argue should become an international standard approach for researchers. A calcium chloride overflow with dispersant and potassium hydroxide digestion provided the highest recovery rate in sardine and anchovy fishmeal (66.3%). Positive correlations with recovery rate were found with protein content, and negative correlations with organic content. Low recovery rates found here suggest microplastics in fishmeal reported in the literature are underestimated. With complex media such as fishmeal, attention must be paid to variation between types and composition when choosing methods and interpreting results.
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