Determination of arsenic in yellow rice wine by online ultraviolet (UV) digestion-atomic fluorescence spectrometry

Arsenic ( As) contents in yellow rice wine were determined by online ultraviolet ( UV) digestion-hydride generation atomic fluorescence spectrometry.Potassium persulfate was used as auxiliary digestion agent. A home-made ultraviolet digester was coupled with hydride generation atomic fluorescence spectrometer to construct the analysis system. The effects of UV digestion power, length of UV digestion pipeline, concentration of auxiliary digestion agent and aqueous p H values on the UV digestion efficiency were studied.Under the optimal conditions, the linear range of arsenic was 0 ~ 40 μg/L with a correlation coefficient ( r) of 0.9989, detection limit, relative standard deviation ( n = 12) and spiked recovery were 1.86 μg/L, 3.57% and93.4% ¹04.6%, respectively. The determination results of arsenic in yellow rice wine obtained by this method were good in agreement with those of national standard method.This method could be used instead of the national standard method ( GB 5009.11-2014) for the determination of arsenic in yellow rice wine, which can not only improve the work efficiency more than ten times, but also reduce the environmental pollution caused by chemical reagents.