Chloride determination by ion chromatography in petroleum coke after digestion by microwave-induced combustion

被引：70

作者：

Pereira, Juliana S. F. ^{[1
]}

Diehl, Liange O. ^{[1
]}

Duarte, Fabio A. ^{[1
]}

Santos, Maria F. P. ^{[2
]}

Guimaraes, Regina C. L. ^{[2
]}

Dressler, Valderi L. ^{[1
]}

Flores, Erico M. M. ^{[1
]}

机构：

[1] Univ Fed Santa Maria, Dept Quim, BR-97105900 Santa Maria, RS, Brazil

[2] Ctr Pesquisas & Desenvolvimento Leopoldo Amer Mig, BR-21941945 Rio De Janeiro, Brazil

来源：

JOURNAL OF CHROMATOGRAPHY A | 2008年 / 1213卷 / 02期

关键词：

Microwave-induced combustion; Petroleum coke; Chloride; Ion chromatography;

D O I：

10.1016/j.chroma.2008.10.079

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

Microwave-induced combustion was applied to petroleum coke digestion in closed vessels for further chloride determination by ion chromatography. Samples were pressed as pellets and placed on a quartz holder. Combustion was performed using oxygen pressure of 2 MPa and 50 mu l of 6mol1(-1) NH4NO3 as aid for ignition. Recoveries from 97 to 102% were obtained for all studied absorbing solutions (water, H2O2, Na2CO3 or(NH4)2CO(3)). Accuracy was evaluated using certified reference materials with agreement better than 98% using water as absorbing solution with reflux step. The limit of quantification was 3.8 mu gg(-1). (c) 2008 Elsevier B.V. All rights reserved.

引用

页码：249 / 252

页数：4

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