Photolysis-ion chromatographic determination of N-nitrosodiethylamine

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X.L. Li
X.L. He
Y.Z. Dong
L.R. Jia
Y.P. Lv


nitrosamine, N-nitrosodiethylamine, photolysis, ion chromatography


Photolysis-Griess reaction (PG) method, as a cost-effective spectrophotometry, is widely used in food enterprises for determination of nitrosamines such as N-nitrosodiethylamine (NDEA). The PG method was conducted based on the amount of photo-produced nitrite ions. Results of this research showed the possible errors of the PG method, since photolysis of NDEA not only generated nitrite, but also nitrate ions. The sum of the concentrations of the two photo-produced ions was found equivalent to the initial NDEA concentration before photolysis. Based on this finding, a photolysis-ion chromatography method was established with good precision and accuracy.

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