Methods for vanadium determination in fuel oil by GF AAS with microemulsification and acid digestion sampling

被引：17

作者：

Amorim, Fabio Alan C. ^{[1
,2
,4
]}

Lima, Daniel C. ^{[1
,2
,3
,4
]}

Amaro, Joana A. A. ^{[1
,4
]}

Vale, Maria Goreti R. ^{[1
,3
,4
]}

Ferreira, Sergio L. C. ^{[1
,4
]}

机构：

[1] Univ Fed Bahia, Inst Quim, BR-40170290 Salvador, BA, Brazil

[2] Univ Fed Bahia, Inst Ciencias Ambientais & Desenvolvimento Susten, BR-47805100 Barreiras, BA, Brazil

[3] Petrobras Petroleo Brasileiro, BR-43970000 San Francisco Conde, BA, Brazil

[4] Univ Fed Rio Grande do Sul, Inst Quim, BR-91501970 Porto Alegre, RS, Brazil

来源：

JOURNAL OF THE BRAZILIAN CHEMICAL SOCIETY | 2007年 / 18卷 / 08期

关键词：

vanadium; fuel oil; microemulsion; digestion sample; GF AAS;

D O I：

10.1590/S0103-50532007000800018

中图分类号：

O6 [化学];

学科分类号：

0703 ;

摘要：

Two methods for vanadium determination in fuel oil are proposed using GF AAS. The first is based on the preparation of a microemulsion followed by direct injection into the graphite tube. The pyrolysis and atomization temperatures, 1500 and 2700 degrees C, respectively, were chosen from the temperature curves. This procedure allows determination of vanadium with a detection limit of 0.10 mu g g(-1) and characteristic mass of 87 pg. The other method uses total acid digestion of the sample with sulfuric acid, nitric acid and hydrogen peroxide. In this procedure, the pyrolysis and atomization temperatures recommended were 1000 and 2700 degrees C, respectively. Among the analytical characteristics for this method are a detection limit of 0.25 mu g g(-1) and a characteristic mass of 63 pg. The accuracy of both procedures was confirmed by the determination of vanadium in the certified reference material NIST SRM 1634c-trace metals in fuel oil.

引用

页码：1566 / 1570

页数：5

共 35 条

[1] Determination of vanadium in petroleum and petroleum products using atomic spectrometric techniques [J].