| Objective To establish a safety, rapid, cost-effective, and reliable analytical method for trace elements detection in aluminum foil based on fiber laser induced breakdown spectroscopy (FL-LIBS). Method Using standards to evaluate analytical sensitivity and limit of detection (LOD) of fiber laser induced breakdown spectroscopy after optimization of laser pulse width, pulse energy, repetition rate and baseline-correction, and the optimized method was applied to analyze trace elements in aluminum foil samples. Result Calibration curves for most elements achieved regression coefficients up to 0.99. Detection sensitivity and LOD followed the descending order of Mn > Cr > Cu > Ti > Mg > Fe > Zn > Si, and the average relative error of Leave-One-Out Cross Validation of all the elements was 14.45 %. The detection results of eight trace elements in 27 aluminum foil samples showed that Fe and Si were frequently detected, while Cu and Ti elements were rarely detected and Cr, Mg, Mn, and Zn elements were not detected. Conclusion This method requires no sample preparation, offers rapid analysis speed, and enables simultaneous multi-element detection with high sensitivity, which promisingly makes it a reliable approach for rapid determination of trace elements in aluminum foil. |
