电感耦合等离子体原子发射光谱法测定铝铁合金中硅磷锰钛

考察了用电感耦合等离子体原子发射光谱法(ICP-AES)测定铝铁合金中硅、磷、锰和钛的分析条件并建立了测定方法。铝铁合金试样经盐酸、硝酸和氢氟酸分解，在射频功率为1 150 W、雾化压力为0.22 MPa、辅助气流量为0.5 L/min、蠕动泵泵速为50 r/min、长波曝光时间为5 s、短波曝光时间为15 s的条件下，使用耐氢氟酸的雾化器和矩管，以ICP-AES测定了试液中硅磷锰钛。通过选择灵敏度适宜和没有干扰的谱线作为被测元素的分析线消除了谱线的重叠干扰，铁铝产生的背景干扰采用背景校正方法扣除。本法已用于铝铁合金样品中硅、磷、锰和钛的测定，其测定值与湿法的测定值相符，测定结果的相对标准偏差≤3.0%。

Inductively coupled plasma atomic emission spectrometric determination of silicon,phosphorus,manganese and titanium in ferroaluminum alloy

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%.