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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Direct determination of calcium and phosphorus in mineral supplements for cattle by wavelength dispersive X-ray fluorescence (WD-XRF)

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Babos, Diego Victor [1] ; Costa, Vinicius Camara [1] ; Speranca, Marco Aurelio [1] ; Pereira-Filho, Edenir Rodrigues [1]
Total Authors: 4
[1] Univ Fed Sao Carlos, Grp Appl Instrumental Anal, Dept Chem, BR-13565905 Sao Carlos, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: Microchemical Journal; v. 137, p. 272-276, MAR 2018.
Web of Science Citations: 12

The current study describes a simple and rapid method for the direct determination of Ca and P in mineral supplements for cattle by wavelength dispersive - X-ray fluorescence (WD-XRF). For calibration, solid standards obtained through a set of reference materials (RMs) of mineral supplements for cattle with concentrations of Ca ranged from 120 to 223 g kg(-1) (r = 0.9809) and P ranged from 29 to 95 g kg(-1) (r = 0.9957) were used. For Ca, the matrix-matching using the RM 18/03 diluted in Na2CO3: NaCl (1:1 w/w) in the range of 0-204 g kg(-1) (r = 0.9975) was also used as calibration strategy. The proposed method presented limits of detection of 47 mg kg(-1) for Ca and 36 mg kg(-1) for P using calibrations with RMs and 61 mg kg(-1) to Ca using matrix matching calibration strategy. Accuracy was assessed by the analysis of four RM of mineral supplements for cattle. A statistical evaluation using student's t-test showed that there is no significant difference between the value obtained with the proposed method and the certified value, at 95% confidence level. The method was successfully applied and is a good alternative to conventional add digestion routine analysis for determination of Ca and P in mineral supplements for cattle. (C) 2017 Elsevier B.V. All rights reserved. (AU)

FAPESP's process: 16/01513-0 - Laser-Induced Breakdown Spectroscopy (LIBS) application in the analyses of electronic waste (printed circuit boards and polymers), food and difficult preparation liquid samples
Grantee:Edenir Rodrigues Pereira Filho
Support type: Regular Research Grants