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Quantification of Metal Leaching in Immobilized Metal Affinity Chromatography
Published on: January 17, 2020
Selective metals determination with a photoreversible spirobenzopyran
L Evans1, G E Collins, R E Shaffer
1Chemistry Division, Naval Research Laboratory, Code 6116, Washington, D.C. 20375-5342.
Analytical Chemistry
|June 14, 2011
Summary
This study demonstrates nitroquinolinospiropyranindoline
Area of Science:
- Analytical Chemistry
- Materials Science
- Spectroscopy
Background:
- Nitroquinolinospiropyranindoline (NQSP) exhibits photoreversible metal-ion complexation.
- Transition metal ion detection is crucial for various applications.
- Supported liquid membranes offer potential for sensor development.
Purpose of the Study:
- To investigate the metal-ion complexation behavior of NQSP.
- To selectively identify six transition metal ions (Zn2+, Co2+, Hg2+, Cu2+, Cd2+, Ni2+).
- To evaluate NQSP in dicapryl phthalate for sensor applications.
Main Methods:
- Utilized nitroquinolinospiropyranindoline (NQSP) as a sensing agent.
- Employed dicapryl phthalate as a support medium for enhanced photoreversibility.
- Applied partial least squares discriminant (PLSD) analysis for chemometric identification.
Main Results:
- NQSP complexation with metal ions induced significant hypsochromic shifts (30-60 nm).
- PLSD analysis successfully differentiated between six divalent transition metal ions.
- Achieved 100% accuracy for single-component and 97.4% accuracy for binary-component metal mixtures.
Conclusions:
- NQSP in dicapryl phthalate is effective for selective metal ion detection.
- PLSD analysis overcomes spectral overlaps for accurate mixture analysis.
- This approach shows promise for developing supported liquid membrane sensors.
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