Determination of inorganic anions by high performance liquid chromatography

Fluorometric determination of nitrite

Methods for the determination of nitrite by high-performance liquid chromatography with electrochemical detection

Determination of inorganic anions by ion chromatography with ultraviolet absorbance detection

A rapid, accurate, and sensitive method has been developed for the simultaneous determination of nitrite and nitrate. A low capacity strong anion exchange PRP-X100 Hamilton, 150 × 4.1 mm, 10 μm, with exchange capacity 0.19 ± 0.02 meq/g, analytical column was used, with a mixture of 0.1 M NaCl-CH3OH, at a volume ratio 45:55. The flow rate of 2 mL/min, lead to a pressure of 150 kg/cm2. Detection was performed with a variable wavelength UV-visible detector, at 230 nm, resulting in detection limits of 0.1 ng and 0.2 ng for nitrite and nitrate, respectively, per 20 μL injection. For the quantitative determination, iodide was used as internal standard, at a concentration of 7.0 ng/μL. A rectilinear relationship was observed up to 12 ng/μL for nitrite and up to 25 ng/μL for nitrate. Analysis time was less than 6 min. The statistical evaluation of the method was examined performing intra–day (n = 8) and inter-day calibration (n = 8) and was found to be satisfactory, with high accuracy and precision results. The m...

Simultaneous determination of nitrite and nitrate in drinking water and human serum by high performance anion-exchange chromatography and uv detection

Determination of nitrate and bromide in foodstuffs by high-performance liquid chromatography

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Determination of nitrate and bromide in foodstuffs by high-performance liquid chromatography