超声雾化电感耦合等离子体原子发射光谱法测定高纯锡锭中痕量杂质元素

Determination of Trace Impurities in High Purity Metal Tin by Ultrasonic Nebulization Inductively Coupled Plasma-Atomic Emission Spectrometry

建立了高纯锡锭中砷、锑、镉等１２种痕量杂质元素的超声雾化－ＩＣＰ－ＡＥＳ测定方法。考察了基体对杂质元素的干扰影响。采用ＨＣｌ＋Ｈ２Ｏ２沸水浴蒸干排Ｓｎ处理，使样品中９０％的Ｓｎ基体挥发与待测元素分离消除基体干扰。方法快速、准确，具有比气动雾化更低的检出限，回收率为８８％～１０３％，ＲＳＤ均小于５％。

A method of determining 12 trace elemental impurities like As, Sb,Cd etc. in high purity metal tin by utrasonic nebulization inductively coupled plasma-atomic emission spectrometry is reported. The effect of the matrix concentration on the determined elements was investigated. To avoid the influence of matrix, the sample was treated by adding hydrogen peroxide and hydrochloric acid and evaporated to dryness by waterbath, to separate the 90% of tin from elements determined. This treatment method is simple and rapid with lower detection limits than common aerosol generator. Testing results show that recovery for the elements determined is from 88% to 103%, and RSD is below 5%.