内部标准优化提升了比例测量检测方法的灵敏度和稳定性
Yuning Jiang1, Jiaying Cao1, Sen Hu1
1The Education Ministry Key Lab of Resource Chemistry, Joint International Research Laboratory of Resource Chemistry, Ministry of Education, and Shanghai Key Laboratory of Rare Earth Functional Materials, College of Environmental and Geographic Sciences, Shanghai Normal University, Shanghai 200234, China. yipingwu@shnu.edu.cn.
The Analyst
|April 29, 2024
概括
这项研究引入了一种新的方法,用于检测湖水中的酸盐离子,使用改性金/氧化芯片. 增强的表面增强拉曼散射 (SERS) 技术提高了十倍的检测灵敏度.
科学领域:
- 分析化学 分析化学
- 环境科学 环境科学
- 材料科学 材料科学 材料科学
背景情况:
- 酸盐离子是重要的环境指标,但在像湖水这样的复杂矩阵中准确确定它们仍然具有挑战性.
- 表面增强拉曼散射 (SERS) 为化学检测提供了高灵敏度,但传统方法可能受到矩阵效应和信号稳定性的限制.
研究的目的:
- 开发一种高度敏感和可靠的比度SERS方法,用于定量湖水中的酸盐离子.
- 作为检测机制,研究由酸盐离子触发的p-aminothiophenol (pATP) 到p,p'-dimercaptoazobenzene (DMAB) 的转化.
- 通过利用SERS频谱中的新型内部标准来提高检测灵敏度.
主要方法:
- 制造一个p-aminothiophenol (pATP) 修饰的金/氧化 (Au/ITO) 芯片.
- 使用酸盐诱导的pATP到p,p'-dimercaptoazobenzene (DMAB) 的化学转化来产生信号.
- 采用一个比度SERS方法与一个新的内部标准 (SERS峰值在1008厘米-1),以提高准确性和灵敏度.
主要成果:
- 经pATP修改的Au/ITO芯片在湖水样本中成功检测出酸盐离子.
- 酸盐离子触发了pATP到DMAB的预期转化,产生了可测量的SERS信号.
- 使用1008 cm-1 SERS峰值作为内部标准,与传统方法相比,检测灵敏度提高了10倍.
结论:
- 开发的比度SERS方法提供了一种敏感且有效的方法来确定环境水样中的酸盐离子.
- 新的内部标准策略显著提高了基于SERS的酸盐检测的可靠性和灵敏性.
- 这种方法对需要精确酸盐离子量化的环境监测应用具有前景.
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