Reverse polarity capillary zone electrophoresis analysis of nitrate and nitrite in natural water samples
This paper describes the application of reverse polarity capillary zone electrophoresis (RPCE) for rapid and accurate determination of nitrate and nitrite in natural water samples. Using hexamethonium bromide (HMB) as an electroosmotic flow modifier in a borate buffer at pH 9.2, the resolution of nitrate and nitrite was accomplished in less than 3 minutes. RPCE was compared with ion chromatographic (IC) and cadmium reduction flow injection analysis (Cd-FIA) methods which are the two most commonly used standard methods for the analysis of natural water samples for nitrate and nitrite. When compared with the ion chromatographic method for the determination of nitrate and nitrite, RPCE reduced analysis time, decreased detection limits by a factor of 10, cut laboratory wastes by more than two orders of magnitude, and eliminated interferences commonly associated with IC. When compared with the cadmium reduction method, RPCE had the advantage of simultaneous determination of nitrate and nitrite, could be used in the presence of various metallic ions that normally interfere in cadmium reduction, and decreased detection limits by a factor of 10.
- Sponsoring Organization:
- USDOE Office of Environmental Restoration and Waste Management, Washington, DC (US)
- DOE Contract Number:
- AC06-96RL13200
- OSTI ID:
- 16960
- Report Number(s):
- HNF-2782-FP; ON: DE99050726; BR: EW3120072; ON: DE99050726; BR: EW3120072; TRN: AH200136%%715
- Resource Relation:
- Other Information: PBD: 11 Jun 1998; Supercedes report DE99050726; PBD: 11 Jun 1998
- Country of Publication:
- United States
- Language:
- English
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