枇杷叶试样于聚四氟烯消解罐中加入硝酸及过氧化氢置于微波炉中加热消解,对所得试样溶液中的14种无机元素用电感耦合等离子体质谱法同时测定.在测定钙、锰、镁、磷及铁的试验中,测得其线性范围在0~200 μg·L-1之间,用标准加入法对所测定的14种无机元素作了回收试验,所得回收率在90%~110%之间.按规定要求测定14种无机元素的检出限,测得结果在0.002~0.4 μg·L-1之间.

Sample of loquat leaves was digested with HNO3 and H2O2 in PTFE vessel heated in microwave oven.Fourteen inorganic elements in the sample solution were determined by ICP-MS.As shown by the data of determination of Ca,Mn,Mg,P and Fe,ranges of linearity were obtained in the range of 0-200 μg·L-1.Tests for recovery were carried out by standard addition method and values of recovery for the 14 elements determined were in the range of 90%-110%.Detection limits for these elements were in the range from 0.002 to 0.4 μg·L-1.