scholarly journals Total phosphorus determination in eutrophic tropical river sediments by laser-induced breakdown spectroscopy techniques

2021 ◽  
Vol 13 (1) ◽  
pp. 77-83
Author(s):  
Carla Pereira de Morais ◽  
Gustavo Nicolodelli ◽  
Milene Corso Mitsuyuki ◽  
Kleydson Stênio Gaioso da Silva ◽  
Frederico Fábio Mauad ◽  
...  
Keyword(s):  
Total Phosphorus ◽  
River Sediments ◽  
Water Bodies ◽  
Laser Induced Breakdown Spectroscopy ◽  
Tropical River ◽  
Breakdown Spectroscopy ◽  
Important Chemical ◽  
Laser Induced Breakdown ◽  
Chemical Variable ◽  
Phosphorus Determination

Total phosphorus (TP) in sediments is an important chemical variable in the study of the extent of eutrophication in water bodies.

Total Phosphorus Determination in Soils Using Laser-Induced Breakdown Spectroscopy: Evaluating Different Sources of Matrix Effects

2020 ◽  
Vol 75 (1) ◽  
pp. 22-33 ◽  
Author(s):  
Sara Sánchez-Esteva ◽  
Maria Knadel ◽  
Rodrigo Labouriau ◽  
Gitte H. Rubæk ◽  
Goswin Heckrath
Keyword(s):  
Particle Size ◽  
Total Phosphorus ◽  
Matrix Effects ◽  
Chemical Form ◽  
Laser Induced Breakdown Spectroscopy ◽  
Size Distributions ◽  
Particle Size Distributions ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown ◽  
Phosphorus Determination

Laser-induced breakdown spectroscopy (LIBS) is a potential alternative to wet chemical methods for total soil phosphorus determination, but matrix effects related to physical and chemical sample properties need to be further understood. The aim of this study was to explore matrix effects linked to particle size distribution and chemical form of phosphorus on LIBS response and the ability of LIBS to predict total phosphorus in a range of different soil types. Univariate calibration curves were developed by spiking the soils with increasing doses of phosphorus, and limits of detection for LIBS determined phosphorous (P) (LIBS-P) were calculated. Different particle size distributions in otherwise identical soils were obtained by four milling treatments and effects of chemical form of phosphorus were examined by spiking soils with identical amounts of phosphorus in different chemical compounds. The LIBS-P response showed a high correlation (R2 > 0.99) with total phosphorus for all soils. Yet, the sensitivity of LIBS differed significantly among soils, as the slope of the calibration curves increased with increasing sand content, resulting in estimated limits of detection of 10 mg kg−1 for the sandiest and 122 mg · kg−1 for the most clayey soils. These limits indicate that quantitative evaluation of total phosphorus in sandy and loamy sandy soils by LIBS is feasible, since they are lower than typical total phosphorus concentrations in soil. A given milling treatment created different particle size distributions depending on soil type, and consequently different LIBS-P results. Thus, procedures that specify the required degree of homogenization of soil samples prior to analysis are needed. Sieving after milling could be an option, but that should be tested. The soils spiked with Fe(III) phosphate, potassium phosphate and phytic acid had similar LIBS-P, except for soils with hydroxyapatite, which resulted in markedly lower response. These results suggested that matrix effects related to the chemical nature of phosphorus would be minor for non-calcareous soils in humid regions, where apatites comprise only a small fraction of total phosphorus. Strategies to overcome matrix effects related to particle size and content of apatite-phosphorus by combining multivariate models and soil type groupings should be further investigated.

Analysis of total nitrogen and total phosphorus in soil using laser-induced breakdown spectroscopy

2013 ◽  
Vol 11 (5) ◽  
pp. 053004-53007 ◽  
Author(s):  
Cuiping Lu Cuiping Lu ◽  
Liusan Wang Liusan Wang ◽  
Haiying Hu Haiying Hu ◽  
Zhong Zhuang Zhong Zhuang ◽  
Yubing Wang Yubing Wang ◽  
...  
Keyword(s):  
Total Nitrogen ◽  
Total Phosphorus ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

scholarly journals Survey of the Water Bodies for Ecotoxic Metals by Laser-Induced Breakdown Spectroscopy

2015 ◽  
Vol 32 (4) ◽  
pp. 284-291 ◽  
Author(s):  
Abul F.M. Yusuf Haider ◽  
Bulu Rahman ◽  
Zulfiqar H. Khan ◽  
Kazi M. Abedin
Keyword(s):  
Water Bodies ◽  
Laser Induced Breakdown Spectroscopy ◽  
Breakdown Spectroscopy ◽  
Laser Induced Breakdown

Nanosecond laser-induced breakdown assisted by femtosecond laser pre-ionization in air: the effect on spatial resolution and continuous radiation

2020 ◽  
Vol 92 (2) ◽  
pp. 20701
Author(s):  
Bo Li ◽  
Xiaofeng Li ◽  
Zhifeng Zhu ◽  
Qiang Gao
Keyword(s):  
Femtosecond Laser ◽  
Spatial Resolution ◽  
Laser Induced Breakdown Spectroscopy ◽  
Nanosecond Laser ◽  
Breakdown Threshold ◽  
Powerful Technique ◽  
Breakdown Spectroscopy ◽  
Continuous Radiation ◽  
Laser Induced Breakdown

Laser-induced breakdown spectroscopy (LIBS) is a powerful technique for quantitative diagnostics of gases. The spatial resolution of LIBS, however, is limited by the volume of plasma. Here femtosecond-nanosecond dual-pulsed LIBS was demonstrated. Using this method, the breakdown threshold was reduced by 80%, and decay of continuous radiation was shortened. In addition, the volume of the plasma was shrunk by 85% and hence, the spatial resolution of LIBS was significantly improved.

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