Abstract
A fast and highly sensitive ion chromatographic method using monolithic ODS columns was developed for the determination of nitrite (NO 2 −) and nitrate (NO3 −) in seawater. Two monolithic ODS columns (50 mm × 4.6 mm i.d. + 100 mm × 4.6 mm i.d.) connected in series were coated and equilibrated with 5 mM cetyltrimethylammonium chloride (CTAC) aqueous solution. The column efficiency with 0.5 M NaCl as the mobile phase did not decrease in spite of the increase in flow rate of the mobile phase. Thus, good chromatograms were obtained within 3 minutes for NO 2 − and NO 3 − in artificial seawater without interferences by coexisting ions. The detection limit (S/N = 3) with UV detection at 225 nm was 0.8 and 1.6 μg/L for NO 2 − and NO 3 −, respectively. The characteristics of the monolithic CTA +-coated ODS columns were discussed. The present method was successfully applied to the fast and sensitive determination of NO 2 − and NO 3 − in real seawater samples.
Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
