High-yield sample introduction using nebulized film dielectric barrier discharge assisted chelate vapor generation for trace rare earth elements determination by inductively coupled plasma mass spectrometry

A new sample introduction method of nebulized film dielectric barrier discharge (NFDBD) assisted chelate vapor generation coupled with inductively plasma mass spectrometry (ICP-MS) for trace rare earth elements (REEs) determination in environmental water was developed this work. Using 2,2,6,6-tetramethyl-3,5-heptanedione (DPM) as chelating reagent, the volatile and stable chelates REE-DPM were effectively vaporized NFDBD sampling system, leading to 8–9 folds enhancement REEs sensitivity compared solution nebulization efficiencies between 51.9% 66.0%. The mechanism experimental parameters including DPM concentration, carrier input voltage argon flow rate evaluated detail. interferences from matrix at 10 mg L?1 level degradation product 0.5 mmol also found negligible system. Under optimized conditions, relative standard deviations 15 0.3% 2.5% concentration ?g detection limits 0.0009 0.11 ng L?1, which 1–2 orders magnitude lower than other systems such nebulization, membrane desolvation, ultrasonic electrothermal vaporization 2–4 system without chelate. This proposed not only can be used directly freshwater samples, but is promising seawater column separation.