Determination of Nitrite in Aqueous Sample by Smartphone with Normalization of Three-Primary Color of Red, Green and Blue
YAN Fei1, YAO Qian-Qian1, HUANG Zheng1, TIAN Li-Nan1, ZHANG Hong-Yi1,2, LIU Yuan1, ZHAO Yun-Fei1
1. College of Chemistry and Environmental Science, Hebei University, Baoding 071002, China; 2. Key Laboratory of Analytical Science and Technology of Hebei Province, Baoding 071002, China
Abstract Digital colorimetric analysis is a new analytical method emerged with the rapid development of digital products in recent years, which often needs values of three-primary colors (R, G and B) of the samples. However, R, G and B are often affected by the photographing environments such as object distance and type of lamp. Therefore, this paper developed a new method called RGB normalization to determine nitrite in aqueous samples via Griess reaction. The precision of RN, GN and BN (normalized R, G and B) is significantly better than that for untreated R, G and B. The process described in this paper can provide a new way for the field analysis of pollutants, and it can be chosen as one of experiments in the general elective experiment course for liberal arts students.
YAN Fei, YAO Qian-Qian, HUANG Zheng, TIAN Li-Nan, ZHANG Hong-Yi, LIU Yuan, ZHAO Yun-Fei. Determination of Nitrite in Aqueous Sample by Smartphone with Normalization of Three-Primary Color of Red, Green and Blue[J]. , 2016, 37(10): 70-74.
