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以钨盐涂覆石墨管提高测定生物样品中钡的灵敏度，以基体改进剂提高分析精度，显著延长石墨管使用寿命，方法简便快速，得到了较好的回收率和精密度。
Graphite tube coated with tungsten salt can improve the sensitivity of barium in biological samples, enhance the accuracy of analysis with matrix modifier and prolong the service life of graphite tube significantly. The method is simple, rapid, and has good recovery and precision.