Direct determination of phosphorus in different food samples by means of solid sampling electrothermal atomic absorption spectrometry using Pd+Ca chemical modifier

Coşkun, Nihat; Akman, Süleyman

doi:10.1016/j.sab.2005.01.003

Cited by 28 publications

(21 citation statements)

References 13 publications

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“…6). Так, в работах [108,109,110] в качестве универ-сального модификатора предложена смесь нитра-тов палладия и магния, а в работе [55] успешно ис-пользовали смесь нитратов палладия и кальция при определении содержания фосфора в пищевых про-дуктах, а с применением модификатора палладий и магний сигнал фосфора увеличивается.…”

Section: таблицаunclassified

A spectral phosphorus determination using its electrothermal and atomization with various chemical modifiers (Review)

Pupyshev¹,

Zaitceva²,

Zaitceva³

2016

АиК

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Section: таблицаunclassified

A spectral phosphorus determination using its electrothermal and atomization with various chemical modifiers (Review)

Pupyshev¹,

Zaitceva²,

Zaitceva³

2016

АиК

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“…However, Persson and Frech (1980) showed other problems as pre-atomisation losses of P in the form of oxides and dimer molecules (P 2 , PO, PO 2 ) and at 213.5-213.6 nm, P needed simultaneously to be atomised and excited, suggesting the use of higher pyrolysis and atomisation temperatures. These problems seemed to be solved using stabilized temperature conditions and appropriated chemical modifiers, as calcium (Ca), fluoride (F), lanthanum (La), nickel (Ni), palladium (Pd) and yttrium (Y) solutions (Curtius et al 1987a;Alvarado et al 1995;Coskun and Akman 2005;Caraballo et al 2000;López-García et al 2007;Lepri et al 2006;Lepri et al 2010;Dessuy et al 2007;Dessuy et al 2008).…”

Section: Introductionmentioning

confidence: 99%

“…Actually, Pd-based chemical modifiers are considered the best chemical modifiers for the determination of P by ET-AAS (Coskun and Akman 2005;Caraballo et al 2000;López-García et al 2007;Lepri et al 2006;Lepri et al 2010;Dessuy et al 2008;Curtius et al 1987b). Already in 1987, Curtius et al (1987b) concluded that one of the best chemical modifiers was 20 μg of palladium nitrate (Pd (NO 3 ) 2 ) mixed with 5 μg of calcium nitrate (Ca(NO 3 ) 2 ), obtaining an m p value for P of 5.5 ng and a limit of detection (LoD) of 8 ng P, with continuum-source background correction (Table 1).…”

Section: Introductionmentioning

confidence: 99%

“…Already in 1987, Curtius et al (1987b) concluded that one of the best chemical modifiers was 20 μg of palladium nitrate (Pd (NO 3 ) 2 ) mixed with 5 μg of calcium nitrate (Ca(NO 3 ) 2 ), obtaining an m p value for P of 5.5 ng and a limit of detection (LoD) of 8 ng P, with continuum-source background correction (Table 1). Later, Coskun and Akman (2005) optimized a direct method for the determination of P in food samples using solid sampling ET-AAS, with deuterium background correction (D 2 -BC). This study concluded that a mixture of 5 μg of Pd(NO 3 ) 2 with 5 μg of Ca(NO 3 ) 2 was the best chemical modifier, with pyrolysis and atomisation temperatures of, respectively, 1,100 and 2,500°C, and with an LoD of 18 ng P (Table 1) (Coskun and Akman 2005).…”

Section: Introductionmentioning

confidence: 99%

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A Simple and Fast Method for Determination of Phosphorus in Fish Diets and Faeces Used in Animal Nutritional Studies

et al. 2011

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The optimization and validation of a simple and fast analytical method for the determination of phosphorus in fish diets and faeces used in animal nutrition studies are shown in this paper, starting with the validation of a preoptimized digestion procedure for biological samples, choice of the best chemical modifier and the minimal sample amounts. The digestion procedure consisted of an acid dissolution of a minimal of 100 mg of dry sample in a domestic microwave system using Parr Teflon bombs at high pressure. The P levels were determined by atomic absorption spectrometry with electrothermal atomisation, using an absorbance of 213.6 nm, a slit width of 1.0 nm, a current lamp of 20 mA and a deuterium lamp for background correction. Different furnace temperature programmes were used, and a final temperature programme was optimized. The optimization stages suggested the use of a 1,000 μg/ml La solution as chemical modifier and 1,600 and 2,700°C as, respectively, the best pyrolysis and atomisation temperatures. The optimized analytical method was applied to different types of fish diets and faeces, and the percentages of recovery of P in spiked samples were, respectively, 94±11% (n=3) and 100±12% (n=3). The detection limit was 0.15 mg P/g of dry sample. The optimized methodology is simpler, faster and has less sample mass consumption than normally used colorimetric methods.

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“…Among analytical techniques usually employed for phosphorus determination are atomic absorption spectrometry [4], inductively coupled plasma optical emission spectrometry [5], gravimetry [6,7], spectrophotometry [8] and voltammetry [9]. The first two methods are characterized by relatively specificity, sensitivity, and determine the total phosphorus.…”

Section: Introductionmentioning

confidence: 99%

Direct Determination of Phosphite in Fertilizers by Flow‐Injection Amperometry

et al. 2007

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A sensor based on graphite electrode modified with palladium-platinum-palladium film is proposed for phosphite determination by flow-injection amperometry. The modified electrode was prepared by a sequential cathodic deposition of Pd, Pt and Pd on a graphite electrode from 0.5% m/v PdCl 2 þ 28% m/v NH 4 OH and 2% m/v H 2 PtCl 6 þ 10% v/v H 2 SO 4 solutions. After suitable conditioning, the electrode showed catalytic activity for phosphite oxidation when 0.15 V was applied. The proposed system handles approximately 50 samples per hour (0.01 -0.05 mol L À1 Na 2 HPO 3 ; R 2 ¼ 0.9997), consuming ca. 70 mL of sample per determination. The limit of detection and amperometric sensibility were 5 Â 10 À4 mol L À1 and 1.5 mA L mol À1, respectively. The proposed method was applied to analysis of fertilizer samples without pre-treatment. Results are in agreement with those obtained by spectrophotometry and titrimetry at 95% confidence level and good recoveries (96 -109%) of spiked samples were found. Relative standard deviation (n ¼ 12) of a 0.01 mol L À1 Na 2 HPO 3 sample was 2%. The useful lifetime of modified electrode was around 220 determinations. For routine purposes it means that this electrode can be continuously used for 5 hours.

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Direct determination of phosphorus in different food samples by means of solid sampling electrothermal atomic absorption spectrometry using Pd+Ca chemical modifier

Cited by 28 publications

References 13 publications

A spectral phosphorus determination using its electrothermal and atomization with various chemical modifiers (Review)

A spectral phosphorus determination using its electrothermal and atomization with various chemical modifiers (Review)

A Simple and Fast Method for Determination of Phosphorus in Fish Diets and Faeces Used in Animal Nutritional Studies

Direct Determination of Phosphite in Fertilizers by Flow‐Injection Amperometry

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