Browsing by Author "1-2-3"

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On-line coupling of derivatization with pre-concentration to determine trace levels of methotrexate

Emara S.; Masujima T.; Zarad W.; Kamal M.; El-Bagary R. (Xi'an Jiaotong University, 2013)

A new simple, sensitive and precise green analytical procedure using an automated packed-reactor derivatization technique coupled with on-line solid-phase enrichment (SPEn) has been developed and evaluated to determine ...
On-line solid-phase enrichment coupled to packed reactor flow injection analysis in a green analytical procedure to determine low levels of folic acid using fluorescence detection

Emara S.; Masujima T.; Zarad W.; Kamal M.; EL-Bagary R. (2012)

Background: Analysis of folic acid (FA) is not an easy task because of its presence in lower concentrations, its lower stability under acidic conditions, and its sensitiveness against light and high temperature. The present ...
Online pre-column derivatization with chromatographic separation to determine folic acid

Emara S.; Masujima T.; Zarad W.; Kamal M.; Ei-Bagary R. (2013)

A simple, sensitive, and selective online pre-column derivatization high-performance liquid chromatographic method was developed and validated for the first time to determine trace levels of folic acid (FA). An oxidant ...

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