The sample in tin leaf clad is put into a graphite crucible with a cap . Firstly the sample is decomposed by heat at about 660 ℃ and the multiform oxygen in the sample is reserved in tin-lithium alloy by the Li2O form .

将锡箔包裹的试样投入带盖石墨坩埚中，第一步先在脉冲电弧炉中于660℃左右热分解，试样中各种形式的氧以 Li2O形式保留在生成的 锡锂合金中；