Atomic Fluorescence Spectrometric Determination of Trace Selenium in Chinese Date

An atomic fluorescence spectrometric method was developed to determine trace selenium in Chinese date by taking 10% HCl solution as the current-carrying solution,selecting 2.0% potassium borohydride solution to enhance fluorescence intensity,and eliminating the disturbance of Pb2+,Cu2+ and Ag+ by enrichment with mercapto cotton and masking with thiourea-ascorbic acid.Results showed that the linear range and detection limit were 1.0-32.0 ng/ml and 0.57 ng/ml,respectively;the recovery varied from 99.0% to 106.3% and the RSD was lower than 1.71%.