To investigate contamination status of As and Hg in vegetables in Changsha,a method for the determination of As and Hg in vegetables by atomic fluorescence spectrometer with microwave digestion had been established.Single factor contaminant index and the synthetic contaminant index method were adopted to evaluate the condition of As and Hg in vegetables.The results showed that the synthetic contaminant index of Ningxiang vegetable production bases in Changsha was safety level.The region has superiority in developing non-environmental pollution ...