Author: Andrade, D. F.

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2 articles found

Comparison of ICP OES and LIBS Analysis of Medicinal Herbs Rich in Flavonoids from Eastern Europe

Author: Andrade, D. F. ; et. al.

Journal: Journal of the Brazilian Chemical Society (2017)

Applications Chemometrics

DOI: 10.21577/0103-5053.20160236

Authors
Konieczynski, P. ; Pereira, E. R.

Keywords

medicinal herbs; essential and toxic metals; LIBS; ICP OES; chemometrics;INDUCED BREAKDOWN SPECTROSCOPY; PRINCIPAL COMPONENT ANALYSIS; TRACE-ELEMENTS; NEUTRON-ACTIVATION; INFUSIONS; INFORMATION; FINGERPRINT; CALCIUM; PLANTS; HONEY

Abstract

Essential and toxic metals were determined in eighteen samples of medicinal herbs from Poland, Lithuania and Serbia by means of laser-induced breakdownspectroscopy (LIBS) and inductively coupled plasma optical emission spectrometry (ICP OES). Calcium, K and Mg concentrations were obtained in % (m/m) and other metals (Na, Co, Cu, Fe, Mn, Ni, Zn, Cd, Cr and Pb) in mg kg-1. The fact that the herb samples analyzed belonged to specific plant species and represented different morphological plant parts explained the characteristic distribution in two-dimensional scores plots obtained by principal component analysis (PCA). A strong correlation of LIBS results was achieved in comparison to those obtained by ICP OES for Ca, K and Mg. Differences in the types of infusions were observed, in that leaves are related to Zn and Ni concentrations, leaves and flowers to Co, Ca and Mn concentrations and flowers to K, Na, Mg and Fe content.

Area:

Agriculture ; Health

Material:

Herb

Elements:

Lines [nm]:

Ca II 393.37 nm Ca II 396.85 nm Ca I 422.67 nm Ca I 527.03 nm Ca I 612.22 nm Ca I 616.22 nm Ca I 643.91 nm

Lines [nm]:

Mg II 279.55 nm Mg II 280.27 nm Mg I 285.21 nm Mg I 517.27 nm

Lines [nm]:

K II 396.67 nm K I 693.88 nm K I 766.49 nm K I 769.90 nm

Lines [nm]:

N I 821.63 nm N I 871.17 nm N I 868.34 nm

Lines [nm]:

O I 777.19 nm O I 844.64 nm

...

Emmision lines:
C I 247.86 nm
Mg II 279.55 nm
Mg II 280.27 nm
Mg I 285.21 nm
Ca II 393.37 nm
K II 396.67 nm
Ca II 396.85 nm
Ca I 422.67 nm
Mg I 517.27 nm
Ca I 527.03 nm
Ca I 612.22 nm
Ca I 616.22 nm
Ca I 643.91 nm
K I 693.88 nm
K I 766.49 nm
K I 769.90 nm
O I 777.19 nm
N I 821.63 nm
O I 844.64 nm
N I 868.34 nm
N I 871.17 nm

Different sample preparation methods for the analysis of suspension fertilizers combining LIBS and liquid-to-solid matrix conversion: determination of essential and toxic elements

Author: Andrade, D. F. ; et. al.

Journal: Analytical Methods (2017)

Applications Chemometrics

DOI: 10.1039/c7ay01049d

Authors
Pereira, E. R. ; Speranca, M. A.

Keywords

INDUCED BREAKDOWN SPECTROSCOPY; OPTICAL-EMISSION-SPECTROMETRY; TRACE-ELEMENTS; MICRONUTRIENTS; MEMBRANE; CADMIUM; WATER

Abstract

A novel calibration method was developed for the determination of macronutrients in suspension fertilizer samples by laser-induced breakdown spectroscopy(LIBS). The fertilizer samples were mixed with 10% m/v polyvinyl alcohol (PVA) and dried for approximately 2 h at 50 degrees C, resulting in a solid polymer film with the immobilized liquid sample. This study describes the use of LIBS and 12 normalization strategies to determine Cu, K, Mg, Mn and Zn as well as As, B, Ca, Cd, Cr, Fe, Na, P and Pb in suspension fertilizers by inductively coupled plasma optical emission spectrometry (ICP OES) and inductively coupled plasma mass spectrometry (ICP-MS) analyses. LIBS equipment parameters were chosen following optimization with a Doehlert design. The results clearly demonstrate a good agreement between the LIBS predicted concentrations and the reference concentrations determined by ICP OES after microwave-assisted acid digestion (AOAC 2006.03 Official Method). Correlations of R-2 = 0.9958, 0.9489, 0.9992, 0.9968 and 0.9809 for Cu, K, Mn, Mg and Zn, respectively, were obtained. Significant levels of potentially toxic elements such as 10 mg L-1 As, 4.0 mg L-1 Cd, 8.0 mg L-1 Cr and 20 mg L-1 Pb were detected after ICP-MS analysis. The results with low standard errors of prediction for LIBS (from 0.02 to 0.06%) indicate that this proposed suspension sample preparation procedure exhibits significant potential for the development and implementation of methods for determining essential nutrients in suspension fertilizers and other samples for which mineralization is difficult.

Area:

Agriculture ; Nutrition

Material:

Fertilizer

Elements:

Lines [nm]:

Mg II 279.55 nm Mg II 279.08 nm Mg II 279.80 nm Mg II 280.27 nm Mg I 285.21 nm Mg I 383.23 nm Mg I 383.83 nm Mg I 516.73 nm Mg I 517.27 nm Mg I 518.36 nm

Lines [nm]:

K I 766.49 nm K I 404.41 nm K I 404.72 nm K I 578.24 nm K I 580.17 nm K I 581.21 nm K I 583.19 nm K I 693.88 nm K I 691.11 nm K I 769.90 nm

Lines [nm]:

Mn II 257.61 nm Mn II 259.37 nm Mn II 260.57 nm Mn II 293.93 nm Mn II 294.92 nm Mn I 354.78 nm Mn I 356.95 nm Mn I 403.08 nm Mn I 403.31 nm Mn I 403.45 nm

Lines [nm]:

Cu I 324.75 nm Cu II 213.60 nm Cu II 219.57 nm Cu I 222.57 nm Cu I 224.43 nm Cu II 224.70 nm Cu II 236.99 nm Cu I 327.40 nm Cu I 521.82 nm Cu I 515.32 nm

Lines [nm]:

Zn I 213.86 nm Zn II 250.20 nm Zn II 255.80 nm Zn I 328.23 nm Zn I 330.26 nm Zn I 334.50 nm Zn I 468.01 nm Zn I 472.22 nm Zn I 481.05 nm Zn I 636.23 nm

Emmision lines:
Cu II 213.60 nm
Zn I 213.86 nm
Cu II 219.57 nm
Cu I 222.57 nm
Cu I 224.43 nm
Cu II 224.70 nm
Cu II 236.99 nm
Zn II 250.20 nm
Zn II 255.80 nm
Mn II 257.61 nm
Mn II 259.37 nm
Mn II 260.57 nm
Mg II 279.08 nm
Mg II 279.55 nm
Mg II 279.80 nm
Mg II 280.27 nm
Mg I 285.21 nm
Mn II 293.93 nm
Mn II 294.92 nm
Cu I 324.75 nm
Cu I 327.40 nm
Zn I 328.23 nm
Zn I 330.26 nm
Zn I 334.50 nm
Mn I 354.78 nm
Mn I 356.95 nm
Mg I 383.23 nm
Mg I 383.83 nm
Mn I 403.08 nm
Mn I 403.31 nm
Mn I 403.45 nm
K I 404.41 nm
K I 404.72 nm
Zn I 468.01 nm
Zn I 472.22 nm
Zn I 481.05 nm
Cu I 515.32 nm
Mg I 516.73 nm
Mg I 517.27 nm
Mg I 518.36 nm
Cu I 521.82 nm
K I 578.24 nm
K I 580.17 nm
K I 581.21 nm
K I 583.19 nm
Zn I 636.23 nm
K I 691.11 nm
K I 693.88 nm
K I 766.49 nm
K I 769.90 nm

Co-author: Andrade, D. F.

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Author: Andrade, D. F.

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Co-author: Andrade, D. F.

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