A colorimetric method based on the interaction between the chloramphenicol degradation product 1-(4'-nitrophenyl)-2-aminopropane-1,3-diol and the 2,4,6-trinitrobenzenesulfonic acid reagent was developed. Analytical solutions were reacted with the reagent at pH 9.1 for 20 min at room temperature, and
Colorimetric determination of 3,6-anhydrogalactose in polysaccharides from red seaweeds
β Scribed by Betty Matsuhiro; Alberto B. Zanlungo
- Publisher
- Elsevier Science
- Year
- 1983
- Tongue
- English
- Weight
- 171 KB
- Volume
- 118
- Category
- Article
- ISSN
- 0008-6215
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## Abstract The ^31^Pο£Ώ^31^P and ^13^Cο£Ώ^31^P coupling constants in 1,6βdiphosphatriptycene have been obtained from analysis of its proton decoupled ^13^C n.m.r. spectra. More accurate data, however, resulted from simultaneous analysis of the proton decoupled ^13^C spectra and ^31^P(^13^C) satellite