本发明属于煤中元素含量的化学检测技术领域，具体涉及一种高压密闭消解‑电感耦合等离子体质谱测定煤中锂的方法。包括以下步骤：S1、称取粉碎至200目的定量样品，置于高压密闭消解罐中，并依次加入2 mLHNO3、0.5 mL HF、0.25 mL HClO4；S2、将消解罐置于电热板上进行冷消解，待气体完全放出，放入180℃烘箱中保温12 h；S3、冷却后取出消解罐并放置在电热板上进行赶酸处理，待溶液成胶状时，再加入2 mL稀硝酸，将消解罐再次放入165℃烘箱中保温5 h，取出冷却，用纯水定容；S4、对质谱仪进行自动调谐使其参数满足检测要求后再进行检测；S5、根据检测结果，换算得到煤中锂含量。本发明检出限为0.0129μg/g，准确度可靠。
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