Determination of Sodium Chloride Content in High Salt Food by ICP-AES with Sub-sensitive Wave Line

A method for the determination of sodium chloride in high salt food by icp-atomic (ICP-AES) emission spectrometry with sub-sensitive wave line (330.232 nm) was established.And the effect of exogenous potassium ion, calcium ion, magnesium ion, tin ion and zinc ion on the determination of sodium chloride by ICP-AES emission spectrometry with sub-sensitive wave line was estimated.Moreover, the pretreatment was also optimized. The results illustrated that liner range of this method was wider (10~300 mg/L, r=0.9995) than the national standard method (0~20 mg/L, r=0.9998) and the precision was good (RSD < 1.0%), which was equal to the national standard method.The determination of sodium chloride by the ICP-AES emission spectrometry with sub-sensitive wave line method was not affected by the exogenous positive ions, which could avoid the bias from non-target chloride.The method was sensitive, accurate and could be applied in the determination of sodium chloride in high salt food.