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基于"三相转换"技术的土壤CD的便携式固体采样可视化纳米传感器.

Tengpeng Liu1, Xudong Huang2, Chunhui Wang2

  • 1Institute of Quality Standard and Testing Technology for Agro-products, Chinese Academy of Agricultural Sciences, and Key Laboratory of Agro-food Safety and Quality, Ministry of Agriculture and Rural Affairs, Beijing 100081, China; College of Biological Engineering, Henan University of Technology, Zhengzhou 450001, China.

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|April 16, 2024
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概括

一种新的"三相转换"技术使离子传感器能够直接分析固体样本. 这种方法简化了现场元素检测,使得土壤中的等污染物的视觉感测成为可能.

关键词:
是的组成部分.颜值测量传感器的颜色测量传感器直接采用固体样本的方法.微型分析仪微型分析仪土壤 土壤土壤.

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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:

  • 使用离子传感器对固体样本进行直接分析,受到固化元素和矩阵干扰的阻碍.
  • 现有的方法往往需要复杂的样本准备,限制了现场应用.
  • 开发直接对固体进行元素分析的技术对于快速环境监测至关重要.

研究的目的:

  • 建立一个"三相转换"技术,用于直接固体采样和元素分析.
  • 为了使土壤样本中的 (Cd) 在现场可视检测.
  • 开发一种便携且高效的方法,用于从固体矩阵中预先缩和检测Cd.

主要方法:

  • 使用金属陶加热器 (MCH) 电热蒸发器 (ETV) 与介电屏障放电石英陷 (DBD-QT) 相结合,用于固体采样和Cd的预度.
  • 采用基于三酸 (TMT) 功能化金纳米粒子 (AuNPs) 的色度传感器进行视觉检测.
  • 开发了一种便携式ETV-DBD装置,用于直接从土壤中引入Cd,然后用水化以进行色度分析.

主要成果:

  • "三相转化"过程将Cd从固体土壤转化为气溶,然后在石英陷上转化为固体氧化物,最后转化为液态Cd2+离子.
  • 在土壤中 (50毫克样本) 达到0.04毫克/千克的Cd的检测方法极限 (LOD),相对标准偏差 (RSD) <20%.
  • 证明了快速分析 (<10分钟),低功耗 (<130W),便携性 (4.5公斤) 和有效消除 (Pb2+) 干扰.

结论:

  • "三相转换"技术与色度传感器相结合,提供了一种可行的方法,用于直接在现场对固体样本进行元素分析.
  • 这种方法大大简化了样本处理,并克服了固体样本分析中常见的矩阵干扰.
  • 开发的系统对未来的离子传感器在各种固体矩阵中直接视觉检测元素污染物的潜力很大.