钨盐涂覆处理石墨管，大幅度提高测定锂的灵敏度。配以（ＮＨ４）２ＳＯ４基体改进剂，消除生物基体干扰。特征浓度５．５３×１０－３μｇ·ｍＬ－１／１％，回收率大于９３．７２％，相对标准偏差小于８．９３％。 Tungsten-coated graphite tubes significantly increase the sensitivity of lithium measurements. Equipped with (NH4) 2SO4 matrix modifier to eliminate bio-matrix interference. The characteristic concentration is 5.53×10-3μg·mL-1/1%, the recovery rate is more than 93.72%, and the relative standard deviation is less than 8.93%.