AI Article Synopsis
- The study introduces a novel method combining switchable hydrophilic solvent-based effervescence tablets with smartphone digital image colorimetry for detecting nickel ions in the field.
- The effervescence tablets generate an extractant and carbon dioxide in situ, facilitating the extraction of nickel by forming a stable complex with a specific reagent (PAN).
- The method demonstrated high sensitivity with an enhancement factor of 65.1 and successfully detected trace amounts of nickel in various samples, proving its effectiveness for field analysis.
Article Abstract
In this study, the one-step switchable hydrophilic solvent (SHS)-based effervescence tablet microextraction (ETME) was coupled with smartphone digital image colorimetry (SDIC) for the field detection of nickel ion (Ni) for the first time. Both extractant and CO were generated in situ when the novel SHS-based effervescence tablet was placed in the sample solution. The complexant 1-(2-pyridinylazo)-2-naphthaleno (PAN) dissolved from the effervescence tablet to form a stable complex with Ni, and the extractant was uniformly dispersed in the sample solution under the action of CO and fully in contact with Ni-PAN, which enabled efficient extraction of Ni. The color changes of the extraction phase were captured by smartphone, then a quantitative relationship between the concentrations of Ni and color intensity of images captured using a smartphone was established by customized applet WASDIC, which realized quantitative analysis of Ni in different samples. Under optimal conditions, the enhancement factor (EF) of the proposed method was 65.1, the limit of detection (LOD) and limit of quantification (LOQ) were 1.69 and 5.64 μg L, respectively. The developed method was successfully applied to the detection of trace Ni in the environmental samples and natural medicines. And the applicability of the method for use in field analysis was validated.
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| http://dx.doi.org/10.1016/j.talanta.2024.126036 | DOI Listing |
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