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- Title
Verification and Application of Standard Method, BAS EN 26777:2000 for Determination of Nitrites in Domestic Water.
- Authors
Brković, M.; Memić, M.; Selović, A.
- Abstract
UV-Vis spectrometry measurements are frequently used for determination of nitrogen nitrite (N-NO2) concentration in raw and potable water. Method is based on spectrometric measurement of the pink compound formed by reaction of N-(1- naphtyl)-1,2-diaminoethan dichloride (in presence of 4-aminobenzene sulfonamide reagens) with nitrite in acidic solution. pH level must be in range 1.9 ± 0.1 for optimal working conditions. Samples from different locations were collected, preserved and stored according to the standard procedure. Measurements were conducted on 540 nm by using a Varian Cary 50 Probe UV Visible spectrophotometer. Method verification was performed by evaluating sensitivity, linear range, limit of detection (LOD), limit of quantification (LOQ) and interferences. The calibration curve was linear in the range from 0.10 to 0.80 mg/L, with correlation coefficient of 0.9994. Values for LOD and LOQ were 0.022 and 0.073 mg/L N-NO2, respectively. This method can be used if concentration of calcium ion in water is not higher than 250 mg/L and concentration of iron(II) ion is between 200-400 μg/L. Determined N-NO2 concentration in different samples of domestic water were below LOQ. Verified method can be successfully applied to the determination of nitrites in raw and potable water
- Subjects
RESIDENTIAL water consumption; NITRITES -- Environmental aspects; SPECTROPHOTOMETRY
- Publication
Bulletin of the Chemists & Technologists of Bosnia & Herzegovina / Glasnik Hemičara i Tehnologa Bosne i Hercegovine, 2016, p48
- ISSN
0367-4444
- Publication type
Article