Abstract: A method for the determination of 14 kinds of heavy metal in detergent product by ICP-MS was established.The samples were pretreated with microwave digestion.Pressure control was adopted to monitor the digestion process and to examine the digestion conditions.Effects of the amount of sample used,composition of digestion system,digestion temperature and time on the digestion result were investigated.Selection of parameters used as well as the internal standard element for the ICP-MS system was optimized.The detection limits of this method range within 0.002－0.362 μg·L^-1.The relative standard deviations are less than 10%.The spiked recoveries are 90.8%－109.6%.

Key words: detergent, ICP-MS, microwave digestion, heavy metal