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. Methods Using standards to evaluate analytical sensitivity and limit of detection 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. Results Calibration curves for most elements achieved regression coefficients up to 0.99. Detection sensitivity and limit of detection 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 8 kinds of trace elements in 27 kinds of 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.
| 科 Family | 属数 Number of genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) | 属 Genus | 种数 Number of species | 占总种数比例 Percentage of total species (%) |
|---|---|---|---|---|---|---|
| 鹅膏菌科Amanitaceae | 2 | 11 | 5.26 | 鹅膏菌属 Amanita | 10 | 4.78 |
| 小菇科 Mycenaceae | 2 | 12 | 5.74 | 丝盖伞属 Inocybe | 5 | 2.39 |
| 多孔菌科 Polyporaceae | 8 | 14 | 6.70 | 蜡蘑属 Laccaria | 5 | 2.39 |
| 红菇科 Russulaceae | 3 | 23 | 11.00 | 小皮伞属 Marasmius | 6 | 2.87 |
| 小菇属 Mycena | 11 | 5.26 | ||||
| 光柄菇属 Pluteus | 5 | 2.39 | ||||
| 红菇属 Russula | 17 | 8.13 | ||||
| 栓菌属 Trametes | 5 | 2.39 |