NDLI: A Pre-Concentration Procedure Using Cloud Point Extraction for the Determination of Manganese in Saline Effluents of a Petroleum Refinery by Flame Atomic Absorption Spectrometry

Content Provider	Springer Nature Link
Author	Bezerra, Marcos de A. Conceição, André L. B. Ferreira, Sérgio L. C.
Copyright Year	2006
Abstract	This paper describes the development of a cloud point extraction procedure for the determination of manganese in saline effluents by flame atomic absorption spectrometry (FAAS). The optimization step was performed using the Doehlert matrix involving the following variables: buffer concentration, pH and centrifugation time. The validation process was assessed as: parameters of the analytical curve, precision, effect of other ions in the proposed procedure, robustness test and accuracy. The proposed procedure allows the determination of manganese with a detection limit (3δ/S) of 0.60 µg L−1, and a precision expressed as relative standard deviation (RSD) of 2.2 (n = 8) and 1.5% (n = 8) for a manganese concentration of 1 and 5 µg L−1, respectively. The pre-concentration factor obtained was 84. The recovery achieved for the determination of manganese in the presence of several other metal ions demonstrated that this procedure could be satisfactorily applied to the analysis of environmental samples. The accuracy was confirmed by the analysis of CRM trace elements in water (NIST 1643d). This procedure was applied to the determination of manganese in saline effluents of a petroleum refinery. For three analyzed samples the manganese content varied between 44.9 and 67.9 µg L−1.
Starting Page	149
Ending Page	152
Page Count	4
File Format	PDF
ISSN	00263672
Journal	Microchimica Acta
Volume Number	154
Issue Number	1-2
e-ISSN	14365073
Language	English
Publisher	Springer-Verlag
Publisher Date	2006-02-09
Publisher Place	Vienna
Access Restriction	One Nation One Subscription (ONOS)
Subject Keyword	Inorganic Chemistry Physical Chemistry Monitoring/Environmental Analysis/Environmental Ecotoxicology Analytical Chemistry Characterization and Evaluation Materials
Content Type	Text
Resource Type	Article
Subject	Analytical Chemistry

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