Abstract
The present investigation deals with the synthesis of newly designed glucamine-functionalized magnetic graphene oxide (MGO-GLu) nanocomposite for the magnetic solid-phase extraction of inorganic arsenic (III) from water and its determination by inductively coupled plasma mass spectrometry (ICP-MS). The synthesized nanocomposite was comprehensively characterized using scanning electron microscopy (SEM), Fourier transform Infrared (FTIR) and EDX. The extraction of arsenic was optimized by analyzing various parameters, and recovery efficiency of MGO-GLu was found to be maximum at 2 mL HNO3(0.1 M) as desorption solvent, 20 mg sorbent, 40 mL sample volume, 5 min contact time, 2 min desorption time and pH 5. Subsequently, the proposed method was validated under the optimal conditions for its figures of merit comprising limits of detection (LOD), quantification (LOQ), precision and reproducibility that were estimated to be 0.05 ng mL(-1), 0.18 ng mL(-1), 3.23 and 6.7% (%RSD at 10 ng mL(-1), forn = 3 andn = 12 intra- and inter-day), respectively. Finally, the proposed method was applied to real water samples obtained from different sources (river, tap and industrial wastewater) displaying a high recovery range of 83-104%. Thus, the designed nanocomposite sorbent offers ease of applicability, rapid analysis, ease of isolation and efficiency for the trace determination of inorganic arsenic in water environmental samples.