原子吸收分光光度法测定钾元素方法灵敏,选择性较好,但由于钾在空气一乙炔火焰中易产生电离,不仅使吸光度下降,而且使工作曲线向纵轴弯曲。本文试用钠为电离缓冲剂,空气一乙炔火焰原子吸收分光光度法测定饮料中钾,方法简便快速,灵敏准确,结果满意。1 材料与方法1.1 仪器WFX-lA型原子吸收分光光度计(北京第二光学仪器厂);HL-1型钾空心阴极灯(河北衡水市宁强光源厂)。 Atomic absorption spectrophotometric method for the determination of potassium is sensitive and selective. However, due to potassium ionization in the air-acetylene flame, potassium not only reduces the absorbance but also curves the working curve to the longitudinal axis. In this paper, sodium ionization buffer for the test, the air-acetylene flame atomic absorption spectrophotometry Determination of potassium in the beverage, the method is simple and quick, sensitive and accurate, with satisfactory results. 1 Materials and methods 1.1 Instruments WFX-lA atomic absorption spectrophotometer (Beijing Second Optical Instrument Factory); HL-1-type potassium hollow cathode lamp (Hengshui City, Hebei Ningqiang light source plant).