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On‐site sampling of inorganic contamination on the metal surface and analysis with capillary electrophoresis
Author(s) -
Xu Ning,
Lin Haifeng,
Uchiyama Katsumi,
Lin JinMing
Publication year - 2019
Publication title -
journal of separation science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.72
H-Index - 102
eISSN - 1615-9314
pISSN - 1615-9306
DOI - 10.1002/jssc.201800916
Subject(s) - capillary electrophoresis , chemistry , contamination , metal , ion chromatography , electrophoresis , trace metal , analytical chemistry (journal) , chromatography , inorganic chemistry , ecology , organic chemistry , biology
Abstract Pipes are the primary structural elements used for transporting fluid in various industries. The most common damage mechanism is corrosion, which occurs in pipes surface of turbine. The corrosive compounds for pipes are inorganic ion (Na + , Cl − , NH 4 + , NO 3 − , etc.) and grinding oil. For rapid and quantitative detection of inorganic ions on site, more reliable and reproducible analytical methods are demanded. A highly efficient solid–liquid sampling collection system is introduced in this work. Papering on the sample surface, inorganic cations and anions were simultaneously collected and analyzed by capillary electrophoresis with indirect ultraviolet detection. As a result, five cations (Na + , K + , NH 4 + , Ca 2+ , Mg 2+ ) and three anions (Cl − , NO 3 − , SO 4 2− ) were completely separated. The efficiency of the sampling and ability of capillary electrophoresis analysis were presented by the determination of trace‐level (mg/m 2 ) contaminants. The recoveries of cations and anions on the paper from metal surface were between 86.6 and 107.2%, and the relative standard deviations were less than 12.85%.