caa a22 4500 465748503 CHVBK 20180323111827.0 cr unu---uuuuu 170327e19900101xx s 000 0 eng 10.1007/BF00323015 doi (NATIONALLICENCE)springer-10.1007/BF00323015 Ultraviolet multiwavelength absorptiometry (UVMA) for the examination of natural waters and wastewaters [Elektronische Daten] Part II. Determination of nitrate [O. Thomas, S. Gallot, N. Mazas] Summary: A new method for nitrate determination in natural waters and wastewaters based on ultraviolet multiwavelength absorptiometry (UVMA) is proposed. After acquisition of spectral data for a sample, without added reagent or pretreatment at 1 nanometer intervals between 205 and 250 nm, a computational procedure gives in a few seconds the concentration of nitrate. The principle is to use a polynomial correction function to cancel numerically the interferences from suspended and organic matters, and to resolve the system formed by the sum of the proper absorbance of nitrate and the previous function. Matrix calculation is made with the least squares method, which minimizes the error between the measured absorbances and the model. The characteristics of the UVMA method and the residual interferences have been evaluated and a comparison with reference methods for different samples has shown that nitrate UVMA is a valuable tool for fast determination and/or continuous monitoring. Springer-Verlag, 1990 Thomas O. Département de Chimie et Ingéniérie de l'Environnement, ESIGEC, Université de Savoie, B.P. 1104, F-73011, Chambery Cédex, France aut Gallot S. Centre de Mathématiques, Ecole Polytechnique, F-91128, Palaiseau Cédex, France aut Mazas N. Département de Chimie et Ingéniérie de l'Environnement, ESIGEC, Université de Savoie, B.P. 1104, F-73011, Chambery Cédex, France aut Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/3(1990-01-01), 238-240 0937-0633 338:3<238 1990 338 216 https://doi.org/10.1007/BF00323015 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF00323015 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Thomas O. Département de Chimie et Ingéniérie de l'Environnement, ESIGEC, Université de Savoie, B.P. 1104, F-73011, Chambery Cédex, France aut NATIONALLICENCE 700 1- Gallot S. Centre de Mathématiques, Ecole Polytechnique, F-91128, Palaiseau Cédex, France aut NATIONALLICENCE 700 1- Mazas N. Département de Chimie et Ingéniérie de l'Environnement, ESIGEC, Université de Savoie, B.P. 1104, F-73011, Chambery Cédex, France aut NATIONALLICENCE 773 0- Fresenius' Journal of Analytical Chemistry Springer-Verlag 338/3(1990-01-01), 238-240 0937-0633 338:3<238 1990 338 216 Metadata rights reserved Springer special CC-BY-NC licence nationallicence SWISSBIB 465748503 BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer