高精度激光诱导分解光谱分析可食盐中主要矿物营养素,使用微型盐池和交替激光剥离数据采样
Jeong Park1, Song-Hee Han2, Sang-Ho Nam1,3
1Department of Chemistry, Mokpo National University, Jeonnam, Republic of Korea.
Applied spectroscopy
|October 16, 2023
概括
这项研究增强了激光诱导分解光谱 (LIBS) 用于使用特殊基板和交替激光剥离数据采样 (ALADS) 进行盐分析. 这种方法显著提高了可食盐中和等元素的测量精度.
科学领域:
- 分析化学 分析化学
- 频谱学是一种光谱学.
- 材料科学 材料科学 材料科学
背景情况:
- 激光诱导分解光谱 (LIBS) 是一种强大的元素分析技术.
- 提高LIBS测量的精度,特别是对于不均的样本,如盐,仍然是一个挑战.
- 目前的方法经常在样本准备和实现可重复结果方面扎.
研究的目的:
- 提高LIBS的测量精度,用于分析食用盐中的必需矿物质.
- 开发和验证一种新的方法,将水友性增强基质与交替激光剥离数据采样 (ALADS) 方案相结合.
- 评估该综合方法在各种商业盐制品中量化 (K), (Mg), (Ca) 和硫 (S) 的性能.
主要方法:
- 使用增强水友性的固体基板,设计为小型盐池,用于样品制备.
- 应用了交替激光除数据采样 (ALADS) 方案,从LIBS光谱中提取多个精确测量结果.
- 分析了来自不同地理来源 (澳大利亚,玻利维亚,法国,韩国) 的五个商用食用盐样本.
主要成果:
- 结合基质和ALADS方法相比传统的滴干方法,显著改善了样本的一致性.
- 尽管干盐晶体固有的不均性,ALADS提供了高度一致的测量结果.
- 获得了K,Mg,Ca和S的显著测量精度,检测极限较低 (例如,K的0.64 mg/kg).
结论:
- 开发的LIBS方法,集成一个专门的基板和ALADS,为食用盐的元素分析提供了卓越的精度.
- 这种技术适用于盐质量评估,准确量化从ppm到重量%水平的关键元素.
- 这些发现表明,LIBS应用在食品分析和质量控制方面取得了重大进展.
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