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- W2040119373 abstract "A simple, expeditious procedure for confirming the presence of N-nitrosamines in previously screened positive water samples was proposed. Water samples were continuously aspirated into a photometric flow system for screening. Positive samples were then confirmed and N-nitrosamines were identified by gas chromatography using different detectors (mass spectrometry, flame ionization and nitrogen–phosphorus). The system for the screening purpose was based on the preconcentration of the analytes onto a sorbent column, elution, and derivatization to form nitrite, then formation of a coloured product (Griess reaction) and photometric detection. The detection limits of the gas chromatographic method for 100 ml of sample were 2.0–3.5 μg/l, 20–80 and 3–13 ng/l for flame ionization, nitrogen–phosphorus and mass spectrometric detectors, respectively. The precision as RSD was similar for all detectors (3.0–6.5%). The screening of different types of water showed that wastewaters contain levels of N-nitrosamines that can be detected only using MS as a detector." @default.
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- W2040119373 date "2007-06-01" @default.
- W2040119373 modified "2023-10-11" @default.
- W2040119373 title "Comparison of the sensitivities of seven N-nitrosamines in pre-screened waters using an automated preconcentration system and gas chromatography with different detectors" @default.
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- W2040119373 doi "https://doi.org/10.1016/j.chroma.2007.03.117" @default.
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