Objective:Set up a flame-atomic absorption spectroscopy method with cadmium

niccolum

and lead in oficinal magnesium stearate.Method:Oficinal magnesium stearate disposed via microwave digestion or ac-customed digestion

adopting Flame-Atomic Absorption Spectroscopy to determine trace amount lead

niccolum

and cadmium

and review the influence of determination from both disposal.Result:The result of determination by micro-wave digestion is better than accustomed digestion.The results of determination are as follows:cadmium was 0.42-1.12 mg·L-1

niccolum was 3.80-4.06 mg·L-1

lead was 5.07-10.31 mg·L-1.The limit of determination of cad-mium

niccolum

and lead are 0.001 2

0.002 9

0.003 4 mg·L-1

the RSD are 0.2%

2.9%

2.7%

the recovery are 109.18%

101.30%

99.69%.Conclusion:This method possesses excellence of simplify manipulation

high ve-racity and nicer repeatability.It can content the need of trace amount

cadmium

niccolum

and lead determination and offer basis for quality control of oficinal magnesium stearate.