Iron exchange is a goodmethod in extracting terrestrial cosmogenic isotopes.But it need puriety quartz and serious attitude in order to get high extraction proportion.

• 样品的处理采用离子交换法，是行之有效的方法，但需要有高纯度的石英，操作过程也必须谨慎，从而避免和消除污染，以提高宇生核素的提取率。