Determination of chlorine in coal via the SrCl molecule using high-resolution graphite furnace molecular absorption spectrometry and direct solid sample analysis

被引：22

作者：

Pereira, Ederson R. ^{[1
]}

Rocha, Lucas M. ^{[1
]}

Cadorim, Heloisa R. ^{[1
]}

Silva, Vanessa D. ^{[1
]}

Welz, Bernhard ^{[1
,2
]}

Carasek, Eduardo ^{[1
]}

de Andrade, Jailson B. ^{[2
]}

机构：

[1] Univ Fed Santa Catarina, Dept Quim, BR-88040900 Florianopolis, SC, Brazil

[2] Univ Fed Bahia, INCT Energia & Ambiente, Inst Nacl Ciencia & Tecnol CNPq, Salvador, BA, Brazil

来源：

SPECTROCHIMICA ACTA PART B-ATOMIC SPECTROSCOPY | 2015年 / 114卷

关键词：

High-resolution continuum source molecular absorption spectrometry; Graphite furnace vaporization; Direct solid sample analysis; Chlorine determination; Coal analysis; ELECTROTHERMAL VAPORIZATION; SULFUR DETERMINATION; ALCL MOLECULE; FLUORINE; BROMINE; COMBUSTION; HALOGENS; FLAME; MONOFLUORIDE; PHOSPHORUS;

D O I：

10.1016/j.sab.2015.10.001

中图分类号：

O433 [光谱学];

学科分类号：

0703 ; 070302 ;

摘要：

In this study, the determination of chlorine in coal is described via molecular absorption of the strontium monochloride (SrCl) molecule at 635.862 nm using high-resolution continuum source graphite furnace molecular absorption spectrometry (HR-CS GF MAS) and direct solid sample analysis. The pyrolysis and vaporization temperatures were optimized and the measurements are accomplished with a platform coated with zirconium as a permanent chemical modifier in order to increase the sensitivity of the gaseous SrCl molecule generated in the graphite furnace. The optimum pyrolysis and vaporization temperatures were 700 degrees C and 2100 degrees C, respectively. Under optimized conditions, the limit of detection and characteristic mass of the method were 0.85 and 0.24 ng, respectively. The accuracy of the method has been verified using four certified reference materials and one not certified reference material of coal, and the results were in good agreement with the certified or reference values. (C) 2015 Elsevier B.V. All rights reserved.

引用

页码：46 / 50

页数：5

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