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Determination of fluoride as fluorosilane derivative using reversed‐phase HPLC with UV detection for determination of total organic fluorine
Author(s) -
Musijowski Jacek,
Szostek Bogdan,
Koc Mariusz,
Trojanowicz Marek
Publication year - 2010
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.201000179
Subject(s) - fluoride , high performance liquid chromatography , chromatography , chemistry , derivative (finance) , fluorine , reversed phase chromatography , analytical chemistry (journal) , organic chemistry , inorganic chemistry , financial economics , economics
A quantitative method for fluoride determination using RP HPLC and UV detection was developed. The method is based on the reaction of fluoride with triphenylhydroxysilane in highly acidic conditions and extraction of the reaction product into n ‐heptane. Chromatographic conditions as well as the derivatization parameters were optimized. LOQ for fluoride ion was evaluated as 0.25 μM (4.75 ppb) and linear range of response up to 75 μM (1.42 ppm) was obtained. The method was developed as a part of a procedure designed for the determination of total organic fluorine in natural waters, using SPE on a carbon sorbent and sodium biphenyl reagent for the defluorination reaction. LOD for a model compound, perfluorooctanoic acid, calculated for the complete procedure with 2000‐fold preconcentration, is 20 ppt ( n =4). Initial results show feasibility of total organic fluorine determination for environmental purposes.