Separation of iodate, bromide, nitrite, nitrate, and iodide in seawater by ion chromatography using 1-aminoundecyl group chemically bonded silica columns.
Anal Sci
; 2024 Aug 14.
Article
in En
| MEDLINE
| ID: mdl-39143455
ABSTRACT
The separation and detection of six common inorganic anions (iodate (IO3-), bromate (BrO3-), bromide (Br-), nitrite (NO2-), nitrate (NO3-), and iodide (I-)) in pure water and 35 artificial seawater were examined by ion chromatography (IC). As packing materials of separation columns, 1-aminoundecyl group chemically bonded silica (AUS) gels were prepared. Separation of the anions in pure water was achieved using separation columns (150 mm × 4.6 mm i.d.) packed with the AUS gels, 0.1 M NaCl + 5 mM phosphate buffer (pH 4.5) as eluent, and a UV detector (wavelength 225 nm). The anions in artificial seawater were separated and detected with a 300 mm-long column without interferences by matrix anions such as chloride (Cl-) and sulfate (SO42-). The stationary phases have high-capacity anion-exchange/hydrophilic/hydrophobic interaction mixed-modes. The IC system was applied to five inorganic anions, IO3-, Br-, NO2-, NO3-, and I- in seawater of the Seto-Inland Sea, Japan. The detection limits (DLs, S/N = 3) were 11 µg L-1 (IO3-), 93 (Br-), 1.3 (NO2-), 1.4 (NO3-), and 1.1 (I-) for a 100-µL sample injection.
1-Aminoundecyl group chemically bonded silica (AUS) stationary phase; High-capacity anion-exchange/hydrophilic/hydrophobic interaction mixed modes; Inorganic anions (IO3 −, Br−, NO2 −, NO3 −, and I−); Ion chromatography; NaCl mobile phase; Seawater; Ultraviolet detection
Full text:
1
Collection:
01-internacional
Database:
MEDLINE
Language:
En
Journal:
Anal Sci
Year:
2024
Document type:
Article
Affiliation country:
Japan
Country of publication:
Switzerland