电热去溶增强微等离子体光发射光谱法灵敏测定环境水样中的镉、锌、铅和锰。

IF 5.6 1区化学 Q1 CHEMISTRY, ANALYTICAL

Talanta Pub Date : 2024-12-16 DOI:10.1016/j.talanta.2024.127373

Ji-Ying Cai , Jia-Min Xu , Hao Shen, Jian-Hua Wang, Yong-Liang Yu

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引用次数: 0

摘要

为了提高基于点放电（PD）的微等离子体光学发射光谱（PD- mip - oes）系统检测环境水样中痕量Cd、Zn、Pb和Mn的灵敏度，提出了一种新的电热脱溶（ED）引入方法。液体样品通过微型超声波雾化器转化为气溶胶，随后通过350°C的电加热分解。冷凝后得到的分析物（指ED和冷凝后的较小孔径气溶胶和挥发性分析物）被激发并通过PD-MIP-OES检测。对于160 μL的液体样品，在10 s内完成分析，溶出效率为93%。在优化条件下，Cd、Zn、Pb和Mn的检出限分别为1.3、1.2、2.4和2.1 μg L-1。与传统的直接超声雾化引入相比，灵敏度分别提高了17倍、12倍、10倍和14倍。通过对标准物质和实际水样的测量，验证了该方法的准确性和实用性。所设计的ed增强型PD-MIP-OES装置结构紧凑、操作方便、分析速度快，为环境水样中Cd、Zn、Pb、Mn的现场分析提供了方便可靠的工具。

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Electrothermal desolvation-enhanced microplasma optical emission spectrometry for sensitive determination of Cd, Zn Pb and Mn in environmental water samples

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Electrothermal desolvation-enhanced microplasma optical emission spectrometry for sensitive determination of Cd, Zn Pb and Mn in environmental water samples

Herein, a novel electrothermal desolvation (ED) introduction approach is developed to enhance the analytical sensitivity of the point discharge (PD)-based microplasma-optical emission spectrometric (PD-MIP-OES) system for detecting trace Cd, Zn, Pb and Mn in environmental water samples. Liquid samples are converted into aerosols through a miniature ultrasonic nebulizer, and subsequently desolvated by electric heating at 350 °C. The analytes obtained after condensation (referring to the smaller apertures aerosols and volatile analytes after ED and condensation) are excited and detected by PD-MIP-OES. For a 160 μL liquid sample, analysis is completed within 10 s, achieving a desolvation efficiency of 93 %. Under the optimized conditions, the detection limits for Cd, Zn, Pb and Mn are 1.3, 1.2, 2.4 and 2.1 μg L⁻¹, respectively. Compared to traditional direct ultrasonic nebulization introduction, sensitivity increases by 17, 12, 10 and 14 times, respectively. The accuracy and practicality of the proposed method are verified by measuring certified reference material and several real water samples. The ED-enhanced PD-MIP-OES device presented is compact, easy to operate, and capable of rapid analysis, which provides a convenient and reliable tool for the field analysis of Cd, Zn, Pb and Mn in environmental water samples.

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来源期刊

Talanta 化学-分析化学

CiteScore

12.30

自引率

4.90%

发文量

861

审稿时长

29 days

期刊介绍： Talanta provides a forum for the publication of original research papers, short communications, and critical reviews in all branches of pure and applied analytical chemistry. Papers are evaluated based on established guidelines, including the fundamental nature of the study, scientific novelty, substantial improvement or advantage over existing technology or methods, and demonstrated analytical applicability. Original research papers on fundamental studies, and on novel sensor and instrumentation developments, are encouraged. Novel or improved applications in areas such as clinical and biological chemistry, environmental analysis, geochemistry, materials science and engineering, and analytical platforms for omics development are welcome. Analytical performance of methods should be determined, including interference and matrix effects, and methods should be validated by comparison with a standard method, or analysis of a certified reference material. Simple spiking recoveries may not be sufficient. The developed method should especially comprise information on selectivity, sensitivity, detection limits, accuracy, and reliability. However, applying official validation or robustness studies to a routine method or technique does not necessarily constitute novelty. Proper statistical treatment of the data should be provided. Relevant literature should be cited, including related publications by the authors, and authors should discuss how their proposed methodology compares with previously reported methods.