Abstract：Analysis conditions for the determination of silicon, phosphorus, manganese and titanium in ferroaluminum alloy were investigated by inductively coupled plasma atomic emission spectrometry(ICP-AES). Thus a novel determination method was established. After ferroaluminum alloy sample was decomposed by hydrochloric acid, nitric acid and hydrofluoric acid, silicon, phosphorus, manganese and titanium in the test solution were determined by ICP-AES with atomizer and rectangular tubes resistant to hydrofluoric acid under the conditions of radio frequency power of 1 150 W, atomization pressure of 0.22 MPa, auxiliary gas flow rate of 0.5 L/min, peristaltic pump speed of 50 r/min, long-wave exposure time of 5 s and shortwave exposure time of 15 s. The overlap interference of spectral lines was eliminated by selecting the spectral line with appropriate sensitivity and exemption from interference as the analytical line of measured element, and the background interference of iron and aluminum were deducted by background correction method. This method has been used for the determination of silicon, phosphorus, manganese, titanium in ferroaluminum alloy sample. It was found that the results were consistent with those obtained by wet method, and the relative standard deviations were not more than 3.0%.
