Application of Hydride Dual-channel Atomic fluorescence Spectrophotometer in Detecting Arsenic and Mercury in Drinking Water

Objective To explore a method for simultaneously detecting arsenic and mercury in drinking water. [Methods] AFS-230 dual-channel atomic fluorescence spectrophotometer was applied to establish a method for simultaneously detecting arsenic and mercury in drinking water. [Results]Multi-factor study showed that the negative high voltage was 270V, arsenic lamp current was 75 mA, complement cathodes was 25 mA, mercury lamp current was 10 mA, atomizer height was 7 mm; when the stove temperature was 200 ℃, the calibration curves of arsenic and mercury were both above 0.999,the average recovery rate was 95.0%～102.5%, the lowest detection limit of arsenic was 0.42 ng/m1 and that of the mercury was 1.77 ng/ml. [Conclusion] This method is rapid and simple; it can be applied to detect arsenic and mercury according to the national standard.