Nanographene oxide modified phenyl methanethiol nanomagnetic composite for rapid separation of aluminum in wastewaters, foods, and vegetable samples by microwave dispersive magnetic micro solid-phase extraction

A new method based on graphene oxide modified (4-phenyl) methanethiol nanomagnetic composite (Fe3O4@4-PhMT-GO) was used for extraction and separation of aluminum from wastewater, food, and vegetable samples in aluminum cookware by microwave dispersive magnetic micro solid-phase extraction (MDM-mu-SPE). In optimized conditions, the working range (WR), the linear range (LR), the limit of detection (LOD), and enrichment factor (EF) were obtained 5-5200 mu g L-1, 5-1600 mu g L-1, 1.5 mu g L-1, and 48.8, respectively (RSD% = 2.5). By MDM-mu-SPE procedure, the aluminum concentrations in baking rice and spinach with aluminum cookware were obtained 97.43 +/- 2.57 mg g(-1) and 131.64 +/- 5.18 mg g(-1), respectively which was analyzed by atom trap flame atomic absorption spectrometer (AT-FAAS). The results showed, the aluminum concentrations in cooked foods with Teflon cookware were less than aluminum cookware. The methodology was validated by standard reference materials (SRM) and inductively coupled plasma mass spectrometry analysis (ICP-MS).

Automated summary

A new method using graphene oxide modified nanomagnetic composite was developed for extraction and separation of aluminum from wastewater, food, and vegetable samples. The study demonstrated the method's effectiveness in analyzing aluminum concentrations in cooked foods with aluminum cookware. The methodology was validated using standard reference materials and inductively coupled plasma mass spectrometry analysis.