火焰原子吸收光谱法同时测定尿液中钾和钠

Simultaneous Determination of K and Na in Urine with FAAS

采用原子吸收光谱仪同时测定了尿液中钾和钠的含量，并确立了测定钾和钠的优惠条件。加入氯化铯可消除电离干扰，当稀释比例达到1：1000时，可以消除尿基质的干扰。钾和钠的检测限分别为0．0049mg／L和0．0040mg／L，测定范围分别为0．2-5．0mg/L和0．2-3．0mg/L，方法回收率分别为99．6％-108．7％和99．2％-101．3％，变异系数分别为0．56％-1．08％和0A1％-0．82％。结果表明该方法准确、灵敏度高、简便快速。

The simultaneous determination of potassium （K） and sodium （Na） content in urine was established using the atomic absorption spectrometer. The optimized working conditions were ascertained. In order to remove the disturbance of ionization, cesium chloride was added. The disturbance of urinary substrate could be avoided after the urines were diluted to 1：100. The detection limit of K and Na was 0.004 9 mg/L and 0.004 0 mg/L, determination range was 0.2-5.0 mg/L and 0.2-3.0 mg/L, the recovery was 99.6%-108.7% and 99.2%-101.3%, the RSD was 0.56%-1.08%, and 0.41%-0.82%, respectively. The results showed that the method was accurate, sensitive and simple.