基于中的矿物质应力效应的Cd定量分析,采用激光诱导分解光谱
Gangrong Fu1, Wei Hu1, Weiping Xie1
1College of Engineering, Jiangxi Agricultural University, Nanchang 330045, China. mingyin800@126.com.
Analytical methods : advancing methods and applications
|October 30, 2023
概括
这项研究表明,激光诱导分解光谱 (LIBS) 可以准确检测大米中的 (Cd). 结合其他元素的压力效应,可显著提高Cd的量化,确保大米的安全性.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 食品安全 食品安全
背景情况:
- (Cd) 是一种在米中积累的有毒重金属,对健康构成风险.
- 准确和快速检测大米中的Cd对于风险评估至关重要.
- 激光诱导分解光谱 (LIBS) 提供了快速,现场分析的潜力.
研究的目的:
- 评估使用LIBS用于大米中定量Cd的可行性.
- 通过结合Cd应力对其他元素的影响来提高LIBS的准确性.
- 通过分析Cd含量来评估大米的安全性.
主要方法:
- 从可能受到Cd污染的地区收集了40个大米样本.
- 使用石墨炉原子吸收光谱学 (GFAAS) 确定参考Cd含量.
- 获得的LIBS光谱和用于Cd预测的化学测量模型 (PCA,PLSR,ELM).
- 压力相关元素 (Mn,Mg,K,Na) 的综合光谱与Cd光谱进行增强分析.
主要成果:
- 最初的LIBS模型显示出良好的预测准确性 (R2高达0.9771).
- 整合压力效应显著改善了模型性能 (R2高达0.9927).
- 改进的LIBS方法减少了过,并提高了大米中Cd的预测准确性.
结论:
- 与化学测量模型相结合的LIBS是一种可行的方法,用于预测大米中的Cd含量.
- 考虑到Cd对其他元素的压力影响,大大提高了LIBS的准确性.
- 这种方法为快速可靠的米安全评估提供了一个有希望的工具.
相关概念视频
01:29Atomic Emission Spectroscopy: Lab
174
AES is a powerful analytical technique, especially effective when used with plasma sources, producing abundant spectra in characteristic emission lines. The Inductively Coupled Plasma (ICP), in particular, yields superior quantitative analytical data due to its high stability, low noise, low background, and minimal interferences under optimal experimental conditions. However, newer air-operated microwave sources are emerging as promising alternatives that could be more cost-effective than...
174
01:20Atomic Emission Spectroscopy: Overview
2.3K
Atomic emission spectroscopy (AES) is an analytical technique used to determine the elemental composition of a sample by analyzing the light emitted from excited atoms. In AES, atoms in a sample are excited to higher energy levels by thermal energy from high-temperature sources, such as plasma, arcs, or sparks. When these excited atoms return to lower energy states, they emit light at specific wavelengths characteristic of each element. The resulting atomic emission spectrum, which consists of...
2.3K