GFAAS Determination of Zinc in Fish Feed and Feces Using Slurry Sampling

Saleh, Mayra Anton Dib; Neves, Renato de Cássio Ferreira; Silva, Fábio Arlindo; Moraes, Paula Martin de; Loureiro, Vanessa R.; Roldan, Paulo dos Santos; Padilha, Pedro M.

doi:10.1007/s12161-008-9053-0

Cited by 11 publications

(6 citation statements)

References 23 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The limits of detection (LOD) and of quantification (LOQ), which were calculated considering a standard deviation from 20 readings in relation to the blank of the standard solutions and the slope of the analytical curve (LOD=3 σ/slope and LOQ=10 σ/slope) were respectively 0.24 and 0.74 μg L −1 of copper, 0.17 and 0.53 μg L −1 of manganese, and 0.32 and 0.92 μg L −1 of selenium. The life time of the graphite tube was equivalent to 947 firings, which, considering the complexity of the biological matrices, is acceptable for the proposed method when compared with other methods described in the literature (Silva et al 2006;Silva et al 2007;Loureiro et al 2007;Neves et al 2008;Rosa et al 2002;Divrikli et al 2003;Soylak et al 2004;Soylak et al 2005;Saleh et al 2009). …”

Section: Analytical Curvesmentioning

confidence: 94%

Evaluation of Cu, Mn, and Se in Vegetables Using Ultrasonic Extraction and GFAAS Quantification

et al. 2010

Self Cite

View full text Add to dashboard Cite

This paper proposes a method for the determination of copper, manganese, and selenium in vegetables of conventional and organic farming in the state of São Paulo/ Brazil using ultrasonic extraction of analytes and subsequent quantification by graphite furnace atomic absorption spectrometry (GFAAS). Using 0.10 mol L −1 of hydrochloric acid as the extracting solution, the following optimal extraction conditions were established: sample mass of 100 mg, sample grain size of <60 μm, sonication time of five cycles of 40 s, and sonication power of 136 W. The analytes were determined by GFAAS, applying drying temperatures of 90°C to 250°C, pyrolysis temperature of 1,300°C, atomization temperature of 2,300°C, and cleaning temperature of 2,800°C. Palladium nitrate was co-injected with the samples as a chemical modifier and tungsten as a permanent modifier. The accuracy and precision of the proposed extraction method were evaluated based on a certified standard, RM 8433 Corn Bran (NIST RM 8433). The results obtained by the ultrasonic extraction method were equivalent to those obtained by the method of acid mineralization of samples in a microwave oven. However, the proposed methodology reduces the analytical time considerably, favoring the analytical speed. Moreover, the quantity of residues generated and discharged into the environment is also considerably lower.

show abstract

Section: Analytical Curvesmentioning

confidence: 94%

Evaluation of Cu, Mn, and Se in Vegetables Using Ultrasonic Extraction and GFAAS Quantification

et al. 2010

Self Cite

View full text Add to dashboard Cite

show abstract

“…The development, optimization and application of methods for the determination of total and inorganic nitrogen in various environmental samples are objects of great interest in the analytical community. Total nitrogen was determined in biological samples (Berdeaux et al 2009;Saleh et al 2009;Morandi et al 2009), soil (Barthes et al 2006), sediments (Li et al 2007), water (Oms et al 2003), food (Shama andSingh. 2009;Del Campo et al 2009;Hu et al 2008;Pasquini and Faria, 1987), atmospheric deposition (Karthikeyan et al 2009) and fertilizer (Pasquini and Faria, 1987).…”

Section: Introductionmentioning

confidence: 99%

Determination of ammoniacal nitrogen in samples of food, soil, fertilizers and water based on the reaction with formaldehyde

Santos

Reis

et al. 2020

jCEC

View full text Add to dashboard Cite

Ammonium ion of digested samples of food, soil, fertilizer and water was determined based on the reaction of the ammonium ion with formaldehyde, and then titrated with sodium hydroxide solution. The optimization of variables such as the amount of formaldehyde and EDTA concentration carried out through univariate analysis. Under optimized conditions, the method allowed ammonium determination with the achieved detection limit of 1.83 mg L-1, a quantification limit of 6.11 mg L-1 and precision of 6.0 - 0.5% for ammonium solutions of 0.400 - 3.773 mg L-1 concentration, respectively. The procedure was validated using the Kjeldahl method. The method was successfully applied to determinate ammonium in samples of water, soil, fertilizer and oat. The proposed procedure resulted in a simple, fast and cost effective method to the determination of ammonium in routine analysis.

show abstract

“…This technique offers several advantages, such as high sensitivity, detection limit concentrations in ng kg -1 , use of small sample volumes, and determination of a wide variety of trace elements. Considering that the atomizer can act as a chemical reactor, there is a strong possibility of sampling which eliminates the step of prior complete decomposition of the sample [10][11][12][13][14][15][16].…”

Section: Introductionmentioning

confidence: 99%

Zinc determination in samples fish by GFAAS using acid digestion in an ultrasound bath

et al. 2015

View full text Add to dashboard Cite

The aim of this paper was to determine the zinc concentrations in muscle samples of Nile tilapia (Oreochromis niloticus) produced in aquaculture and fed diets containing inorganic and organic zinc sources. In the sample preparation step, the samples were lyophilized and ground cryogenically to produce particles smaller than 60 lm. The zinc extraction was conducted by acid mineralization using concentrated nitric acid and hydrogen peroxide in a thermostatically controlled ultrasonic batch reactor. The zinc determinations were performed by Graphite Furnace Atomic Absorption Spectrometry at a drying temperature of 90-250°C, pyrolysis temperature of 1400°C, atomization temperature of 2400°C, and cleaning temperature of 2800°C. Niobium nitrate was used as a chemical modifier co-injected with the samples, and tungsten was employed as a permanent modifier. Among the muscle tissue samples of Nile tilapia that were analyzed, zinc concentrations were determined in the range of 3.70-19.00 mg kg-1 (LOD 0.012 lg L-1 and LOQ 0.041 lg L-1). The accuracy and precision of the proposed method of zinc determination was validated using the DORM-certified standard Fish Protein 4 NRC.

show abstract

GFAAS Determination of Zinc in Fish Feed and Feces Using Slurry Sampling

Cited by 11 publications

References 23 publications

Evaluation of Cu, Mn, and Se in Vegetables Using Ultrasonic Extraction and GFAAS Quantification

Evaluation of Cu, Mn, and Se in Vegetables Using Ultrasonic Extraction and GFAAS Quantification

Determination of ammoniacal nitrogen in samples of food, soil, fertilizers and water based on the reaction with formaldehyde

Zinc determination in samples fish by GFAAS using acid digestion in an ultrasound bath

Contact Info

Product

Resources

About