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Imaging Corrosion at the Metal-Paint Interface Using Time-of-Flight Secondary Ion Mass Spectrometry
Published on: May 6, 2019
Towards metals analysis using corona discharge ionization ion mobility spectrometry
Mohammad T Jafari1, Mohammad Saraji1, Hossein Sherafatmand1
1Department of Chemistry, Isfahan University of Technology, Isfahan, 84156-83111, Iran.
This study introduces a new method combining dispersive liquid-liquid microextraction (DLLME) with corona discharge ionization ion mobility spectrometry (CD-IMS) for sensitive metal determination. The developed technique efficiently extracts and quantifies mercury in real samples.
Area of Science:
- Analytical Chemistry
- Spectrometry
- Environmental Analysis
Background:
- Ion mobility spectrometry (IMS) is a powerful analytical technique.
- Determining metal complexes requires sensitive and rapid methods.
- Existing methods for trace metal analysis can be complex.
Purpose of the Study:
- To evaluate corona discharge ionization ion mobility spectrometry (CD-IMS) for metal complex determination.
- To develop a simple, rapid, and sensitive method for trace metal analysis.
- To apply the developed method for mercury determination in real samples.
Main Methods:
- Dispersive liquid-liquid microextraction (DLLME) was used for sample preparation.
- Mercury was complexed with diethyldithiocarbamate (DEDTC).
- Corona discharge ionization ion mobility spectrometry (CD-IMS) was employed for detection.
Main Results:
- Optimized DLLME achieved an enrichment factor of 142.
- A linear range of 0.035-10.0 μg mL⁻¹ and a detection limit of 0.010 μg mL⁻¹ were obtained.
- The method demonstrated high precision with relative standard deviations below 4% (intra-day) and 8% (inter-day).
Conclusions:
- The combination of DLLME and CD-IMS offers a simple, rapid, and sensitive approach for metal determination.
- The developed method is effective for trace mercury analysis in various real samples.
- This technique avoids tedious derivatization or hydride generation steps.
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