We have developed an innovative optical emission spectrometry imaging device integrating a diode laser for sample introduction and an atmospheric pressure plasma based on dielectric barrier discharge for atomization and excitation. By optimizing the device parameters and ensuring appropriate leaf moisture, we achieved effective imaging with a lateral resolution as low as 50 μm. This device allows for tracking the accumulation of Cd and related species such as K, Zn, and O, in plant leaves exposed to different Cd levels and culture times. The results obtained are comparable to established in-lab imaging and quantitative methods. With its features of compact construction, minimal sample preparation, ease of operation, and low limit of detection (0.04 μg/g for Cd), this novel methodology shows promise as an in-situ elemental imaging tool for interdisciplinary applications.

中文翻译：

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开发基于大气压等离子体的 OES 装置，用于植物中 Cd 和相关元素的原位绘图


我们开发了一种创新的光学发射光谱成像装置，集成了用于样品引入的二极管激光器和基于电介质阻挡放电的用于原子化和激发的大气压等离子体。通过优化设备参数并确保适当的叶片湿度，我们实现了横向分辨率低至 50 μm 的有效成像。该装置可以跟踪暴露于不同镉水平和培养时间的植物叶片中镉和相关物质（如钾、锌和氧）的积累。获得的结果与现有的实验室成像和定量方法相当。这种新颖的方法具有结构紧凑、样品制备最少、操作简便和检测限低（Cd 为 0.04 μg/g）等特点，显示出作为跨学科应用的原位元素成像工具的前景。