钾、钠的原子吸收分析报道很多［１～３］，高含量钾、钠多采用逐级稀释原子吸收法或四苯硼酸钠容量法和焦性锑酸钾比浊法，这些方法流程较长，干扰较多。 本文研究了利用次灵敏线测定饼干中高含量钾钠，样品经干法消化定容到一定体积后，可不经稀释用原子吸收仪直接进行钾、钠 Atomic absorption analysis of potassium and sodium has been reported many [1 ~ 3], high levels of potassium, sodium and more by gradual dilution atomic absorption or sodium tetraphenylborate capacity method and the focus of potassium antimony turbidimetric method, these methods longer process , More interference. This paper studies the use of sub-sensitive line determination of high-content sodium and potassium biscuits, the sample was dry digested volume to a certain volume, can be used without dilution atomic absorption spectrometry direct potassium, sodium