Direct determination of copper and zinc in alcoholic and non-alcoholic drinks using high-resolution continuum source flame atomic absorption spectrometry and internal standardization

2018 ◽  
Vol 147 ◽  
pp. 21-27 ◽  
Author(s):  
Laura Fernández-López ◽  
Beatriz Gómez-Nieto ◽  
Mª. Jesús Gismera ◽  
Mª. Teresa Sevilla ◽  
Jesús R. Procopio
Keyword(s):  
High Resolution ◽  
Flame Atomic Absorption Spectrometry ◽  
Direct Determination ◽  
Absorption Spectrometry ◽  
Continuum Source ◽  
Flame Atomic Absorption ◽  
Alcoholic Drinks ◽  
Internal Standardization ◽  
Determination Of Copper

scholarly journals Multi-Element Determination of Trace Elements in B7-diesel Oil by High-Resolution Continuum Source Flame Atomic Absorption Spectrometry

2021 ◽  
Vol 8 ◽  
Author(s):  
Heldiane S. dos Santos ◽  
Alexandre de Jesus ◽  
Diane O. Laroque ◽  
Clarisse M. S. Piatnicki ◽  
Márcia M. da Silva
Keyword(s):  
Trace Elements ◽  
High Resolution ◽  
Atomic Absorption Spectrometry ◽  
Flame Atomic Absorption Spectrometry ◽  
Absorption Spectrometry ◽  
Diesel Oil ◽  
Element Determination ◽  
Continuum Source ◽  
Flame Atomic Absorption

In this work, a method for sequential multi-element determination of Cu, Fe, Ni, Pb, Zn, Al, Cr and Sn in B7-diesel oil samples by high-resolution continuum source flame atomic absorption spectrometry (HR-CS F AAS) was proposed. The sample preparation was based on formation of microemulsion (ME), which was investigated through a three-phase diagram. The ME composition adopted was B7-diesel oil (3.3 g), aqueous phase containing nitric acid (1.4 mol L-1, 300 μL) and n-propanol (up to 10 mL). The use of surfactant Triton X-100 in the formation of ME was also evaluated. Limits of detection in the range of 0.01 – 0.4 mg kg-1 were obtained. Spike-recovery tests were accomplished and the results varied between 93 and 124%. The accuracy of the proposed method was confirmed by the analysis of certified reference material (CRM) NIST SRM 1084a (Wear-Metals in Lubricating Oil); there was no statistical difference between the obtained results and the certified values (at 95% confidence level). Twelve B7-diesel oil samples were analyzed and Cu, Fe and Cr were found in three samples. The proposed method was simple, fast and accurate. The sequential multi-element determination of trace elements presented advantages as low costs and reduction in analysis time, being appropriate for routine analysis.

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