In situ sorbent formation dispersive solid phase extraction for multi-elemental analysis: a new approach using cyclen...

Area of Science:

• Analytical Chemistry
• Environmental Science
• Materials Science

Background:

• Petroleum products can contain toxic metal ions.
• Accurate determination of these metals is crucial for environmental and industrial safety.
• Existing methods for metal ion extraction from petroleum matrices can be complex and time-consuming.

Purpose of the Study:

• To develop a novel, simultaneous extraction method for seven specific metal ions (V, Cr, Ni, Cu, Zn, Cd, Pb) in petroleum samples.
• To utilize an in situ sorbent formation dispersive solid-phase extraction technique.
• To validate the method's performance in real-world petroleum samples.

Main Methods:

• An in situ sorbent formation dispersive solid-phase extraction (DLLME-SP) method was employed.
• A home-made extraction device was used for processing larger sample volumes.
• Cyclen served as both the chelating agent and sorbent material.
• A magnetic ionic liquid was utilized as the collection and dissolution solvent.

Main Results:

• The method achieved simultaneous extraction of V, Cr, Ni, Cu, Zn, Cd, and Pb.
• Optimized conditions resulted in a wide linear range and low detection limits.
• High precision (RSD ≤8.5%) and good extraction recoveries (56-72%) were obtained.
• The method demonstrated robustness against petroleum matrix effects.

Conclusions:

• The developed in situ sorbent formation DLLME-SP method is effective for simultaneous metal ion extraction from petroleum.
• The method is accurate, precise, and suitable for analyzing real petroleum samples.
• This technique offers a reliable approach for monitoring metal contaminants in petroleum products.