Foodstuffs. Determination of trace elements. Determination of sodium and magnesium by flame atomic absorption spectrometry (AAS) after microwave digestion

2008 ◽  
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Microwave Digestion ◽  
Absorption Spectrometry ◽  
Flame Atomic Absorption

Online Preconcentration System Using 6-(2-Thienyl)-2-Pyridine Carboxaldehyde Functionalized Amberlite XAD-4 Resin for the Determination of Trace Elements in Waters by Flame Atomic Absorption Spectrometry

2013 ◽  
Vol 96 (3) ◽  
pp. 642-649 ◽  
Author(s):  
Cennet Karadaş ◽  
Derya Kara
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Water Samples ◽  
Certified Reference Materials ◽  
Absorption Spectrometry ◽  
Rice Flour ◽  
Flame Atomic Absorption

Abstract An online flow injection method was developed for the determination of trace elements in waters using 6-(2-thienyl)-2-pyridinecarboxaldehyde functionalized Amberlite XAD-4 resin. The metals were eluted with 1.0 M HNO3 directly to a flame atomic absorption spectrometry determination system. The sorption capacities of the resin for metal ions were 74.6, 113.7, 48.3, 131.6, and 88.6 μmol/g for Cd(II), Ni(II), Pb(II), Co(II), and Cu(II), respectively. The resin was found to be very stable and capable of being used for more than 250 retention and elution cycles without major loss of performance. Detection limits (3SD) were determined to be 0.14 μg/L for Cd, 0.39 μg/L for Cu, 0.82 μg/L for Ni, 0.88 μg/L for Co, and 2.54 μg/L for Pb using 10 mL sample loading. The accuracy of the proposed method was checked using different certified reference materials [estuarine water (SLEW-3), riverine water (SRLS-5), 19-element aqueous standard (QCS-19), wheat flour (NBS 1567 a), and rice flour unpolished high level Cd (NIES 10c)]. Results were in agreement with certified values. The proposed method was applied to the determination of Cu, Ni, Co, Cd, and Pb in natural water samples. The recovery values for spiked water samples were between 91.9 and 107.4%.

Determination of Several Element Levels in Hardaliye Beverages Using Flame Atomic Absorption Spectrometry After Ultrasound-Probe Extraction

2017 ◽  
Vol 100 (5) ◽  
pp. 1531-1538
Author(s):  
Dilek Bakircioglu ◽  
Nukte Topraksever ◽  
Yasemin Bakircioglu Kurtulus
Keyword(s):  
Trace Elements ◽  
Atomic Absorption Spectrometry ◽  
Atomic Absorption ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Ultrasound Probe ◽  
Experimental Conditions ◽  
Extraction Procedures ◽  
Flame Atomic Absorption

Abstract In the present study, concentrations of calcium (Ca), copper (Cu), magnesium (Mg), manganese (Mn), sodium (Na), and zinc (Zn) in hardaliye samples produced in Turkey were determined by flame atomic absorption spectrometry after ultrasound probe extraction (UPE), microwave-assisted extraction (MAE), and wet extraction procedures. At present, there is limited work in the literature on UPE for the determination of trace elements in beverage samples. Our single-correlation analysis showed that the elements studied with the UPE method in hardaliye were strongly correlated with the MAE procedure. The parameters affecting the UPE experimental conditions—such as ultrasound amplitude, sonication time, sample amount, extractant type, and volume—were studied. Optimal experimental conditions for the extraction of the metals with the UPE procedure were as follows: 2 min of sonication; 30% amplitude; 3 mL sample volume;5% HNO3 extraction solution; and 1 mL extractant volume for Ca, Cu, Mg, Mn, Na, and Zn in thehardaliye samples. The results in the hardaliye samples in minimum–maximum mg/L with the UPE procedure were 33–63 for Ca, 0.10–0.27 forCu, 3.9–14.4 for Mg, 1.0–3.2 for Mn,32–58 for Na, and 0.39–1.1 for Zn. LODs were 0.0032, 0.012, 0.013, 0.009, 0.011, and 0.008 mg/L for Ca, Cu, Mg, Mn, Na, and Zn, respectively. The accuracy of the method was verified with a recovery test (in which recoveries between 95 and 110% wereobserved) and application to a NIST 1643e certified sample (trace elements in water). The UPE procedure was found to be fast, accurate, and simple, with fewer contaminants and lower concentrated reagent consumption in comparison with conventional extraction procedures.

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