水质 钠和钾的测定 第3部分:火焰发射光谱法测定钠和钾

[中文适用范围]： 该方法的原理是将样品吸入具有足够热能的气体火焰中，使存在的任何钠和钾发出其特征辐射，并测量钠波长为 589,0 nm 和钠波长为 766,5 nm 的强度。 钾。 适用于钠和钾质量浓度高达 10 mg/l 的水样。 对于较高浓度，取较小的测试部分进行分析。 钠和钾的测定下限均小于 0.1 mg/l。 [外文原描述]： The principle of the method specified is aspirating the sample into a gas flame of sufficient thermal energy to cause any sodium and potassium present to emit its characteristic radiation and measuring the intensity at a wavelength of 589,0 nm for sodium and 766,5 nm for potassium. Applies to water samples with a mass concentration of sodium and potassium of up to 10 mg/l. For higher concentrations, a smaller test portion is taken for analysis. The lower limits of determination are less than 0,1 mg/l for both sodium and potassium.