评估光谱光度流量注射和微波诱导等离子体光学发射光谱法用于肥料中的量化
Vitoria Marques Mariano1, Jorge Cesar Masini1
1Departamento de Química Fundamental, Instituto de Química, Universidade de São Paulo, Av. Prof. Lineu Prestes 748, 05508-000 São Paulo, SP, Brazil.
Journal of AOAC International
|September 19, 2025
概括
为了改进肥料分析,评估了流量注射分析 (FIA) 和微波诱导等离子体光学发射光谱 (MIP-OES) 以量化元素. MIP-OES提供了更高的吞吐量和灵敏度,而FIA则为常规实验室提供了可访问性.
科学领域:
- 分析化学 分析化学
- 农业科学 农业科学
- 环境监测 环境监测
背景情况:
- 肥料分析中对高效质量控制的需求日益增加,需要对元素进行自动化或替代方法.
- 准确和快速的量化对于农业肥料制造商来说至关重要,以满足监管标准.
研究的目的:
- 评估流注分析 (FIA) 方法与微波诱导等离子光学发射光谱学 (MIP-OES) 对元素的确定.
- 为了比较FIA与分子吸收光谱仪和MIP-OES用于肥料分析的性能.
主要方法:
- 评估了三种方法:光谱测量 (黄色的聚酸和蓝色) 和MIP-OES.
- 根据官方程序,用水和中性酸 (NAC) 提取了肥料样本.
- 流量注入分析 (FIA) 系统用于光谱光度法.
主要成果:
- 通过FIA方法,每小时可达120次分析,而MIP-OES达到240次分析.
- 与光谱法相比,MIP-OES显示出更高的灵敏度 (LOQ < 0.2 mg/L) 和更广泛的线性范围.
- 所有评估的方法 (FIA光谱测量和MIP-OES) 与经过认证的参考材料显示了可接受的准确性和精度.
结论:
- FIA提供了简单性和低成本,使其适合常规质量控制实验室.
- 尽管初始仪器成本较高,但MIP-OES提供了更高的吞吐量,并消除了试剂制备.
- 监管机构建议FIA和MIP-OES作为官方分析方法,因为它们具有互补的优势.
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