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Optimization of simultaneous determination of metals in commercial pumpkin seed oils using inductively coupled atomic emission spectrometry
Microchemical Journal ( IF 4.8 ) Pub Date : 2018-09-01 , DOI: 10.1016/j.microc.2018.05.022
Milan Mitić , Aleksandra Pavlović , Snežana Tošić , Pavle Mašković , Danijela Kostić , Snežana Mitić , Gordana Kocić , Jelena Mašković

Abstract In this work, the inductively coupled plasma atomic emission spectrometry (ICP-AES) was developed and validated for determination of 27 metals in nine pumpkin oils from two production processes (cold pressed and roasted). A microwave assisted digestion was applied for the dissolution of the samples. To evaluate plasma robustness and analytical performance, the Mg II 280.270 nm/Mg I 285.213 nm (Mg II/Mg I) line intensity ratio was used. The robust plasma conditions in axial/radial view mode were reached at an RW power of 1150 W and an argon nebulizer flow rate of 0.5 L/min. The method is evaluated by application of the standard addition method and by recovery test. In general, the recoveries for all elements in pumpkin seed oils were between 90% and 110% except, only for Cd, Pb and As they were 110%. The most abundant element is K followed by, Mg, P, Ca and Na. Pumpkin seed oils were also found to be a good source of Fe, Zn, Cu and Mn. The highest levels of analyzed elements were found in pumpkin seed oils producing from the roasted pumpkin seed paste. In all samples, the content of heavy metals was below the recommended tolerable levels proposed by Joint FAO/WHO Expert Committee on Food Additives and does not a pose a health risk for the consumer. The levels of the metals in pumpkin seed oils were also compared with those reported by the literature. Cluster analysis (CA) of the analytical data confirmed the observed differences between oils from two production processes.

中文翻译:

电感耦合原子发射光谱法同时测定商品南瓜籽油中金属的优化

摘要 在这项工作中,电感耦合等离子体原子发射光谱法 (ICP-AES) 的开发和验证可用于测定来自两种生产工艺(冷压和烘烤)的 9 种南瓜油中的 27 种金属。应用微波辅助消解来溶解样品。为了评估等离子体的稳定性和分析性能,使用了 Mg II 280.270 nm/Mg I 285.213 nm (Mg II/Mg I) 线强度比。在 1150 W 的 RW 功率和 0.5 L/min 的氩气雾化器流速下,可达到轴向/径向视图模式下稳定的等离子体条件。该方法通过应用标准添加方法和回收率测试来评估。一般来说,南瓜籽油中所有元素的回收率都在 90% 到 110% 之间,只有 Cd、Pb 和 As 的回收率为 110%。含量最多的元素是 K,其次是 Mg、P、Ca 和 Na。南瓜籽油也被发现是铁、锌、铜和锰的良好来源。在由烤南瓜籽糊生产的南瓜籽油中发现了最高水平的分析元素。在所有样本中,重金属含量均低于粮农组织/世卫组织食品添加剂联合专家委员会建议的推荐耐受水平,不会对消费者构成健康风险。南瓜籽油中的金属含量也与文献报道的含量进行了比较。分析数据的聚类分析 (CA) 证实了来自两个生产过程的油之间观察到的差异。在由烤南瓜籽糊生产的南瓜籽油中发现了最高水平的分析元素。在所有样本中,重金属含量均低于粮农组织/世卫组织食品添加剂联合专家委员会建议的推荐耐受水平,不会对消费者构成健康风险。南瓜籽油中的金属含量也与文献报道的含量进行了比较。分析数据的聚类分析 (CA) 证实了来自两个生产过程的油之间观察到的差异。在由烤南瓜籽糊生产的南瓜籽油中发现了最高水平的分析元素。在所有样本中,重金属含量均低于粮农组织/世卫组织食品添加剂联合专家委员会建议的推荐耐受水平,不会对消费者构成健康风险。南瓜籽油中的金属含量也与文献报道的含量进行了比较。分析数据的聚类分析 (CA) 证实了来自两个生产过程的油之间观察到的差异。南瓜籽油中的金属含量也与文献报道的含量进行了比较。分析数据的聚类分析 (CA) 证实了来自两个生产过程的油之间观察到的差异。南瓜籽油中的金属含量也与文献报道的含量进行了比较。分析数据的聚类分析 (CA) 证实了来自两个生产过程的油之间观察到的差异。
更新日期:2018-09-01
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