[1] M Nehir, M Esposito, C Begler, et al. Improved calibration and data processing procedures of OPUS optical sensor for high-resolution in situ monitoring of nitrate in seawater. Frontiers in Marine Science, 8, 663800(2021).
[2] K S Johnson, L J Coletti. In situ ultraviolet spectrophotometry for high resolution and long-term monitoring of nitrate, bromide and bisulfide in the ocean. Deep Sea Research Part I: Oceanographic Research Papers, 49, 1291-1305(2002).
[3] C M Sakamoto, K S Johnson, L J Coletti, et al. Pressure correction for the computation of nitrate concentrations in seawater using an in situ ultraviolet spectrophotometer. Limnology and Oceanography: Methods, 15, 897-902(2017).