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应用高效毛细管区带电泳法快速测定饮料中的6种碱金属及碱土金属离子。采用75μm×57cm（有效长度50cm）的未经处理的熔融石英毛细管柱，以5mmol／L，咪唑溶液作为背景电解质（用0．1mol／LH2SO4溶液调PH值至4．5），选用25KV分离电压和22℃柱温，于210nm波长处以间接紫外进行检测，对样品中的K+、Na+、Li+、Ca2+、Mg2+、Ba2+等6种碱金属及碱土金属离子进行分离测定。实验结果表明：应用毛细管区带电泳（CZE）法测定饮用水及饮料中碱金属和碱土金属离子具有快速、简便、灵敏度高、重现性好以及成本低等优点。测定结果与原子吸收光谱法（AAS法）无显著性差异。
Rapid Determination of 6 Alkali and Alkaline Earth Metal Ions in Beverages by High Performance Capillary Zone Electrophoresis. Using 75μm × 57cm (effective length 50cm) untreated fused silica capillary column with 5mmol / L, imidazole solution as the background electrolyte (with 0.1mol / LH2SO4 solution to adjust the PH value to 4.5), the choice of 25KV separation voltage And 22 ℃ column temperature, at 210nm wavelength indirect UV detection, the sample of K, Na, Li, Ca, Ca2, Mg2, Ba2 and other six kinds of alkali metal and alkaline earth metal ions were determined. The experimental results show that the determination of alkali metal and alkaline earth metal ions in drinking water and beverage by capillary zone electrophoresis (CZE) has the advantages of fast, simple, high sensitivity, good reproducibility and low cost. The results of determination and atomic absorption spectrometry (AAS method) no significant difference.