Fourier-transform flame atomic absorption spectrometry with continuum source excitation

1989 ◽  
Vol 61 (15) ◽  
pp. 1694-1697 ◽  
Author(s):  
Mark R. Glick ◽  
Bradley T. Jones ◽  
Benjamin W. Smith ◽  
James D. Winefordner
Keyword(s):  
Fourier Transform ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Source Excitation

scholarly journals Exploring potentialities of the HR-CS FAAS technique in the determination of Ni and Pb in mineral waters

2008 ◽  
Vol 33 (1) ◽  
pp. 49-56 ◽  
Author(s):  
V. R.. Amorim Filho ◽  
V. P. Franzini ◽  
J. A. Gomes Neto
Keyword(s):  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Natural Waters ◽  
Absorption Spectrometry ◽  
Mineral Waters ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Atomic Lines

National Health Surveillance Agency (ANVISA) established in the decree number 54 maximum allowed levels for Ni and Pb in mineral and natural waters at 20 µg L-1 and 10 µg L-1, respectively. For screening analysis purposes, the high-resolution continuum source flame atomic absorption spectrometry technique (HR-CS FAAS) was evaluated for the fast-sequential determination of nickel and lead in mineral waters.Two atomic lines for Ni (232.003 nm - main and 341.477 nm - secondary) and Pb (217.0005 nm - main and 283.306 nm - secondary) at different wavelength integrated absorbance (number of pixels) were evaluated. Sensitivity enhanced with the increase of the number of pixels and with the summation of the atomic lines absorbances. The main figures of merit associated to the HR-CS FAAS technique were compared with that obtained by line-source flame atomic absorption spectrometry (LS FAAS). Water samples were pre-concentrated about 5-fold by evaporation before analysis. Recoveries of Pb significantly varied with increased wavelength integrated absorbance. Better recoveries (92-93%) were observed for higher number of pixels at the main line or summating the atomic lines (90-92%). This influence was irrelevant for Ni, and recoveries in the 92-104% range were obtained in all situations.

Determination of Calcium in Leisure Foods by Incomplete Digestion-Microemulsion Sampling-High Resolution Continuum Source Flame Atomic Absorption Spectrometry

2014 ◽  
Vol 1010-1012 ◽  
pp. 417-421
Author(s):  
Chao Li ◽  
Shang Long Chen
Keyword(s):  
High Resolution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Comparative Method ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Significant Difference

The aim of this work was to evaluate the microemulsification after incomplete digestion as sample preparation procedure for determination of Ca in leisure foods by high resolution continuum source flame atomic absorption spectrometry (HR-CS FAAS). Microemulsions were prepared with digestive liquor and n-butyl alcohol as an auxiliary emulsifier after incomplete digestion treatment. The appropriate fuel flow, 70 L/h, and the optimum burner height, 5 mm, were obtained by single factor experimental design. The results showed that the correlation coefficient was better than 0.999, the characteristic concentration was 0.086 mg/L, the precision (RSD) for 6 replicate measurements of Ca was 1.7% and the average of recoveries was 102.1%. F-test and t-test (95% confidence level) in between the proposed method and the comparative method, using microwave digestion-HR-CS FAAS, had no significant difference. Therefore, the proposed method was accurate and stable with a high practical value. It provided scientific basis for determination of metal elements in food.

scholarly journals DETERMINATION OF COPPER AT WIDE RANGE CONCENTRATIONS USING INSTRUMENTAL FEATURES OF HIGH-RESOLUTION CONTINUUM SOURCE FLAME ATOMIC ABSORPTION SPECTROMETRY

2018 ◽  
Vol 35 (4) ◽  
pp. 87
Author(s):  
Renata Toledo Lima ◽  
Jorge Luiz Raposo Júnior ◽  
Alex Virgílio ◽  
José Anchieta Gomes Neto
Keyword(s):  
High Resolution ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Relative Standard ◽  
Wide Range

This work describes a method to determine Cu at wide range concentrations in a single run without need of further dilutions employing high-resolution continuum source flame atomic absorption spectrometry. Different atomic lines for Cu at 324.754 nm, 327.396 nm, 222.570 nm, 249.215 nm and 224.426 nm were evaluated and main figures of merit established. Absorbance measurements at 324.754 nm, 249.215 nm and 224.426 nm allows the determination of Cu in the 0.07 – 5.0 mg L-1, 5.0 – 100 mg L-1 and 100 – 800 mg L-1 concentration intervals respectively with linear correlation coefficients better than 0.998. Limits of detection were 21 μg L-1, 310 μg L-1 and 1400 μg L-1 for 324.754 nm, 249.215 nm and 224.426 nm, respectively and relative standard deviations (n = 12) were £ 2.7%. The proposed method was applied to water samples spiked with Cu and the results were in agreement at a 95% of confidence level (paired t-test) with those obtained by line-source flame atomic absorption spectrometry.

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