Conclusions
The FÉKN-56 colorimeter enables us to improve the accuracy of a color determination of a color determination of residual raffinate by a factor of 5 in comparison with determinations in the KN-51 colorimeter.
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Translated from Khimiya i Tekhnologiya Topliv i Masel, No. 1, pp. 57–58, January, 1970.
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Butrim, S.N., Glebova, A.P., Ivanyuk, G.E. et al. Comparison of the results of color determination in the KN-51 and FÉKN-56 colorimeters. Chem Technol Fuels Oils 6, 68–69 (1970). https://doi.org/10.1007/BF00729745
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DOI: https://doi.org/10.1007/BF00729745