Title of article :
Determination of nutrients in the presence of high chloride concentrations by column-switching ion chromatography
Author/Authors :
Bruno، نويسنده , , P and Caselli، نويسنده , , M and de Gennaro، نويسنده , , G and De Tommaso، نويسنده , , B and Lastella، نويسنده , , G and Mastrolitti، نويسنده , , S، نويسنده ,
Issue Information :
روزنامه با شماره پیاپی سال 2003
Pages :
9
From page :
133
To page :
141
Abstract :
Determination of inorganic anions in waters of high salinity is one of the most difficult task in analytical chemistry. A simple column-switching method, based on an original chromatographic set-up, for the determination of nutrients (nitrate, nitrite and phosphate) in chloride rich aqueous matrices is presented. A pre-separation system (made of two in line pre-columns, Dionex AG9-HC 4 mm) connected to an analytical column (Dionex AS9-HC 4 mm) by a four way pneumatic valve, allows chloride to be eluted off into the waste and nutrients to be separated and detected by a conductimeter and/or a UV spectrophotometer. Neither chemical pre-treatment nor sample dilution are required; sample matrices presenting a large range of chloride concentrations can be investigated. Moreover by using this technology, automation for routine analysis, low analysis time and low costs can be achieved. LODs of 100, 300, 1000 μg/l for nitrate, nitrite and phosphate, respectively, have been obtained by spiking a synthetic sea water sample containing 20 000 mg/l of chloride and 3000 mg/l of sulphate. Analyte calibration curves of analytes are linear (r>0.99) in the range between the LODs and 60 mg/l. This method was applied to nutrients determination in sea water samples collected near a river outlet.
Keywords :
inorganic anions , chloride
Journal title :
Journal of Chromatography A
Serial Year :
2003
Journal title :
Journal of Chromatography A
Record number :
1519330
Link To Document :
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