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Improved Method for the Determination of the Total Adipyl Content in Acetylated Adipyl Cross‐linked Starches
Author(s) -
Sanders Peter,
Brunt Kommer
Publication year - 1994
Publication title -
starch ‐ stärke
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.62
H-Index - 82
eISSN - 1521-379X
pISSN - 0038-9056
DOI - 10.1002/star.19940460706
Subject(s) - adipic acid , repeatability , acetylation , chromatography , chemistry , relative standard deviation , ethyl acetate , solvent , content (measure theory) , organic chemistry , biochemistry , mathematics , detection limit , mathematical analysis , gene
An improved gas chromatographic determination of the adipyl content in acetylated adipyl cross‐linked starches using pimelic acid as internal standard is described. The modifications provide an analytical protocol in which the amount of organic solvent (ethyl acetate) needed for each determination was reduced tenfold and the capacity of the analysis was increased threefold. Compared to the original method the accuracy of the improved determination is the same, but the repeatability is about three times better. The standard deviation based on 55 independent duplicates, is 13 ppm adipic acid. The adipic acid concentration in the analyzed samples varied from 0–1630 ppm.