Quantitative Analysis of Nutrient Elements in Soil Using Single and Double-Pulse Laser-Induced Breakdown Spectroscopy

被引：64

作者：

He, Yong ^{[1
,2
]}

Liu, Xiaodan ^{[1
,2
]}

Lv, Yangyang ^{[1
]}

Liu, Fei ^{[1
,2
]}

Peng, Jiyu ^{[1
]}

Shen, Tingling ^{[1
]}

Zhao, Yun ^{[1
,3
]}

Tang, Yu ^{[4
]}

Luo, Shaoming ^{[4
]}

机构：

[1] Zhejiang Univ, Coll Biosyst Engn & Food Sci, 866 Yuhangtang Rd, Hangzhou 310058, Zhejiang, Peoples R China

[2] Minist Agr, Key Lab Spect Sensing, Hangzhou 310058, Zhejiang, Peoples R China

[3] Zhejiang Univ Sci & Technol, Sch Informat & Elect Engn, 318 Liuhe Rd, Hangzhou 310023, Zhejiang, Peoples R China

[4] Zhongkai Univ Agr & Engn, Coll Automat, Guangzhou 510225, Guangdong, Peoples R China

来源：

SENSORS | 2018年 / 18卷 / 05期

关键词：

soil; nutrient elements; laser-induced breakdown spectroscopy; single-pulse; double-pulse; chemometrics; SUPPORT VECTOR MACHINE; LS-SVM; INFRARED-SPECTROSCOPY; TRACE-ELEMENTS; NITROGEN; SAMPLES; DISCRIMINATION; CHEMOMETRICS; SPECTROMETRY; INFORMATION;

D O I：

10.3390/s18051526

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

Rapid detection of soil nutrient elements is beneficial to the evaluation of crop yield, and it's of great significance in agricultural production. The aim of this work was to compare the detection ability of single-pulse (SP) and collinear double-pulse (DP) laser-induced breakdown spectroscopy (LIBS) for soil nutrient elements and obtain an accurate and reliable method for rapid detection of soil nutrient elements. 63 soil samples were collected for SP and collinear DP signal acquisition, respectively. Macro-nutrients (K, Ca, Mg) and micro-nutrients (Fe, Mn, Na) were analyzed. Three main aspects of all elements were investigated, including spectral intensity, signal stability, and detection sensitivity. Signal-to-noise ratio (SNR) and relative standard deviation (RSD) of elemental spectra were applied to evaluate the stability of SP and collinear DP signals. In terms of detection sensitivity, the performance of chemometrics models (univariate and multivariate analysis models) and the limit of detection (LOD) of elements were analyzed, and the results indicated that the DP-LIBS technique coupled with PLSR could be an accurate and reliable method in the quantitative determination of soil nutrient elements.

引用

页数：16

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