Chinese Optics Letters, 2014, 12 (12): 123001, Published Online: Dec. 4, 2014
Effects of acid anions, major metallic elements, and chlorides on Li detection by DFWM in graphite furnace
300.2570 Four-wave mixing 300.6290 Spectroscopy, four-wave mixing 190.4380 Nonlinear optics, four-wave mixing
Abstract
In trace Li analysis with degenerate four-wave mixing (DFWM) method, acid anions and major metallic elements are dominant interferences in Li-containing samples. To better use DFWM technique to analyze trace Li in actual samples, we study their effects on Li DFWM signal intensity. It is found that K, Cs, and Ni can enhance the Li DFWM signal, SO2-4..., PO3-4..., Cl-, and Ca can cause significant suppression, and NO3-, Mg, Ba, Sr, and Na almost have no effects. Finally, we use H3BO3 to eliminate the depressive effects of chlorides on Li DFWM signal. The result is also of reference in other trace elements analysis with DFWM.
Kun Fei, Xuemei Cheng, Xunli Yin, Haowei Chen, Jintao Bai, Zhaoyu Ren. Effects of acid anions, major metallic elements, and chlorides on Li detection by DFWM in graphite furnace[J]. Chinese Optics Letters, 2014, 12(12): 123001.