Iron fractionation for corrosion products from natural gas pipelines by continuous-flow sequential extraction

被引：0

作者：

Kaewkhomdee, Nattikarn

Kalambaheti, Chatvalee

Predapitakkun, Somrudee

Siripinyanond, Atitaya

Shiowatana, Juwadee

机构：

[1] Mahidol Univ, Fac Sci, Dept Chem, Bangkok 10400, Thailand

[2] PTT Publ Co Ltd, PTT Res & Technol Inst, Analyt & Petr Res Dept, Ayutthaya 13170, Thailand

来源：

ANALYTICAL AND BIOANALYTICAL CHEMISTRY | 2006年 / 386卷 / 02期

关键词：

corrosion product; iron fractionation; sequential extraction;

D O I：

暂无

中图分类号：

Q5 [生物化学];

学科分类号：

071010 ; 081704 ;

摘要：

The forms and quantities of iron species in corrosion product samples from natural gas pipelines were examined, using a continuous-flow sequential extraction system. Sequential extraction consists of four steps that dissolve water soluble iron (FeSO4), acid soluble iron (FeCO3), reducible iron (Fe-(oxyhydr)oxides) and oxidisable iron (FeS2) fractions, respectively. Selectivity of extracting reagents for particular iron species was evaluated by determination of co-extracted anions, using ion chromatography, and evolved CO2, using indirect flame atomic absorption spectrometer (FAAS). Iron was found predominantly in the reducible fraction (61-99%), indicating that Fe-(oxyhydr)oxides are the major constituents of the corrosion products.

引用

页码：363 / 369

页数：7

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