water sample of nitrite

This dataset contains 198  nitrite water samples with different concentrations. We used sodium nitrite and distilled water to prepare nitrite water samples with concentrations ranging from 0.010 mg/L to 0.200 mg/L and gradients of 0.010 mg/L, as well as nitrite water samples with concentrations of 0.005 mg/L, then 198 images were taken under different lighting intensities (including natural light with different intensities, natural light with different intensities of light sources, and different intensities of light sources in a darkroom). The content of solid nitrite used in this experiment is 99.05%，and the manufacturer of the nitrite test reagent is SOUTH RANCH, and the product model of the camera is HD1313.