Abstract
Laser-induced breakdown spectroscopy (LIBS) coupled with the linear multivariate calibration method was applied to analyze nitrogen (N) quantitatively in ammonium phosphate fertilizers. The intensity of lines N (NI:742.4, 744.2, 746.8, 856.7, 859.4, 862.9, 870.3, 871.2, 871.8 nm) and O (OI:777.2, 844.6, 882.0 nm) were used as independent variables for the models. To verify the accuracy of the models, the unary, binary, ternary, and quaternary variables were chosen to establish the linear regression equations. The results of the linear models showed that the quaternary model was better than the other three models. The correlation coefficient of the quaternary linear model was 0.981 and the maximum relative error of the validation samples was 4.32%.
© 2019 Optical Society of America
Full Article | PDF ArticleMore Like This
Tianbing Chen, Lin Huang, Mingyin Yao, Huiqin Hu, Caihong Wang, and Muhua Liu
Appl. Opt. 54(25) 7807-7812 (2015)
Qingyu Lin, Pengkun Yin, Yixiang Duan, Ying Wang, Lin Zhang, and Xiaohui Wang
Opt. Express 28(10) 14198-14208 (2020)
Cuiping Lu, Gang Lv, Chaoyi Shi, Duoyang Qiu, Feixiang Jin, Man Gu, and Wen Sha
Appl. Opt. 59(28) 8582-8587 (2020)