Determination of Ca and K in Vegetables with Flame Atomic Emission Spectrometry

The sample was treated with suspension technique.Turnip sample was crushed and sieved to make agar suspension.La~(3+) was used as releasing agent and Nacl as deionization agent for potassium.An analytical method for rapid determination of calcium and potassium in turnip with suspension sampling-flame atomic emission spectrometry was developed.Identity of viscosity for test solution and its blank solution,and the effect of medium and detection limit were studied.RSD was less than 1.8%.The determination results of this method were consistent with those obtained through ashing method.The relative errors were less than ±1.9%.