采用干法灰化、湿法消化、微波消解和超声提取4种前处理方法对豆类进行消解,利用火焰原子吸收光谱法(FAAS)测定铜、镁、锰和锌4种矿质元素的含量。结果表明,在优化的条件下(超声时间、温度、样品量、粒径以及提取剂的种类和体积),用超声提取标准物质GBW10013的结果与湿法、干法以及微波法基本一致,且均与参考值符合,但超声提取法和微波消解法速度快、污染小、试剂消耗少、残渣少、精密度和准确度高。 Four kinds of pretreatment methods, dry ash, wet digestion, microwave digestion and ultrasonic extraction, were used to digest legumes. FAAS was used to determine the contents of four mineral elements, Cu, Mg, Mn and Zn. The results showed that under the optimal conditions (ultrasonic time, temperature, sample size, particle size and the type and volume of extractant), the result of ultrasonic extraction of GBW10013 was basically the same as that of wet method, dry method and microwave method, And the reference value, but ultrasonic extraction and microwave digestion speed, less pollution, less reagent consumption, less residue, precision and accuracy.