对补充剂的样品制备方法进行调查,以确定总的数量
Larissa M A Oliveira1, Diogo P Moraes1, Juliana S F Pereira1
1Universidade Federal do Rio Grande do Sul, Instituto de Química, Porto Alegre, RS 91501-970, Brazil.
ACS omega
|December 22, 2025
概括
微波诱导燃烧 (MIC) 是消化测定补充剂的最有效方法. 与导电加热和微波辅助湿消化 (MWAD) 相比,这种方法提供了更高的消化效率,更低的检测极限,以及更好的绿色.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
背景情况:
- 精确确定 (Se) 在食补充剂中的含量对于质量控制和消费者安全至关重要.
- 传统的样品准备方法可能耗时,并且可能并不总是提供最佳的效率或环保性.
- 评估不同的消化技术对于改善分析在复杂的矩阵,如食补充剂是必不可少的.
研究的目的:
- 在石墨炉原子吸收光谱 (GF AAS) 分析之前,研究和比较三种不同的样品制备方法,用于在食补充剂中的消化.
- 为了优化导热,微波辅助湿消化 (MWAD) 和微波诱导燃烧 (MIC) 的消化条件.
- 评估每个方法的消化效率,绿色度和整体性能,以获得可靠的量化.
主要方法:
- 使用导电加热,MWAD和MIC进行样本消化,优化酸度 (酸,过氧化) 和燃烧辅助剂 (微晶纤维素).
- 通过测量剩余碳含量 (RCC) 和剩余酸度 (RA) 来评估消化效率.
- 使用GF AAS与 (Pd) 作为化学修饰剂量化的量化,并使用AGREEprep软件评估方法的绿色度.
主要成果:
- 为每个消化方法建立了优化条件,详细说明了样品质量,酸度,温度和反应时间.
- 微波诱导燃烧 (MIC) 显示出卓越的性能,产生了最低的剩余碳含量 (0.1%) 和剩余酸度 (0.5%).
- MIC为提供了最佳的检测极限 (0.08μggg-1),所有方法都显示出良好的一致性 (96.7-99.5%) 对于经过认证的参考材料.
结论:
- 微波诱导燃烧 (MIC) 是最有效和高效的样本准备技术,用于在食补充剂的确定.
- 在消化效率,灵敏度 (较低的LOD) 和环境影响 (较高的绿色分数为0.49) 方面,MIC提供了显著的优势.
- 该研究为三个消化方法提供了优化的协议,使研究人员能够根据他们的分析需求和资源选择最合适的技术.
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