| Full text | |
| Author(s): |
Amaral, Clarice D. B.
[1, 2]
;
Machado, Raquel C.
[1, 2]
;
Virgilio, Alex
[2]
;
Schiavo, Daniela
[3]
;
Nogueira, Ana Rita A.
[1, 2]
;
Nobrega, Joaquim A.
[2]
Total Authors: 6
|
| Affiliation: | [1] Embrapa Pecuaria Sudeste, Sao Carlos, SP - Brazil
[2] Univ Fed Sao Carlos, Dept Chem, Grp Appl Instrumental Anal, POB 676, BR-13560970 Sao Carlos, SP - Brazil
[3] Agilent Technol, Sao Paulo, SP - Brazil
Total Affiliations: 3
|
| Document type: | Journal article |
| Source: | Journal of Analytical Atomic Spectrometry; v. 31, n. 6, p. 1179-1184, JUN 2016. |
| Web of Science Citations: | 6 |
| Abstract | |
The feasibility of internal standardization and the oxygen reaction in ICP-MS was studied for accurate determination of boron. Lithium, Be and Rh were systematically evaluated as internal standards (IS.) for B determination in plants by ICP-MS/MS using a single quadrupole mode and MS/MS mode with O-2 into a cell, where B and internal standard signal intensities were processed either after both or only one of them reacted. Carbon is a source of spectral and matrix interferences in B determination by ICP-MS. The use of instrumental strategies such as tandem mass spectrometry (MS/MS) concomitantly with internal standardization demands further investigation about the I.S. behaviour regarding the gas phase reaction with oxygen. The behaviours of B and Be, as well as their oxides, were quite similar in an octopole reaction system containing O-2. The coexistence of spectral and non-spectral interferences was evidenced by increasing carbon concentrations in samples and checking positive errors caused for B-11(+). Recoveries for B determination in plant certified reference materials without I.S. ranged from 98 to 145% and with Be as an internal standard ranged from 98 to 108%. Beryllium presented favourable characteristics as an internal standard for B due to its mass closeness, similar ionization energy, and reactivity with oxygen. (AU) | |
| FAPESP's process: | 13/26672-5 - Development of procedures to As, Ba, Cd, Cr, Pb and Si determination in fertilizer samples by using microwave inductive plasma optical emission spectrometry (MIP OES) |
| Grantee: | Raquel Cardoso Machado |
| Support Opportunities: | Scholarships in Brazil - Doctorate |
| FAPESP's process: | 14/18393-1 - Evaluation of gradient flow analysis as calibration strategy for spectroanalytical techniques with plasma source |
| Grantee: | Alex Virgilio |
| Support Opportunities: | Scholarships in Brazil - Post-Doctoral |
| FAPESP's process: | 15/14488-0 - Analytical method development for quality determination of fertilizers and tanning waste |
| Grantee: | Ana Rita de Araujo Nogueira |
| Support Opportunities: | Regular Research Grants |