Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry

J. H. Marsman; R. T. Pieters; L. P. B. M. Janssen; A. A. C. M. Beenackers

doi:10.1002/star.19900420507

Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry

J. H. Marsman^*
, R. T. Pieters
, L. P. B. M. Janssen
, A. A. C. M. Beenackers

^*Corresponding author for this work

Research output: Contribution to journal › Article › Academic › peer-review

16 Citations (Scopus)

Abstract

A quantitative method for the determination of the degree of substitution (DS) of extruded benzylated starch is developed (DS = 0.01 – 0.40). Sample pretreatment by freezing the product in liquid nitrogen and a methanol extraction of the reaction components (e. g. benzyl chloride, benzyl alcohol) is described. Aqueous formic acid solutions of the starch products were analyzed both with UV analysis (λ = 259 nm.) and with a NMR “coaxial tubing” analysis technique. Both techniques showed similar results with good correlation and a standard deviation < 0.01 DS.

Original language	English
Pages (from-to)	191-196
Number of pages	6
Journal	Starch-Starke
Volume	42
Issue number	5
DOIs	https://doi.org/10.1002/star.19900420507
Publication status	Published - May-1990

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Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry
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title = "Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry",

abstract = "A quantitative method for the determination of the degree of substitution (DS) of extruded benzylated starch is developed (DS = 0.01 – 0.40). Sample pretreatment by freezing the product in liquid nitrogen and a methanol extraction of the reaction components (e. g. benzyl chloride, benzyl alcohol) is described. Aqueous formic acid solutions of the starch products were analyzed both with UV analysis (λ = 259 nm.) and with a NMR “coaxial tubing” analysis technique. Both techniques showed similar results with good correlation and a standard deviation < 0.01 DS.",

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year = "1990",

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T1 - Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry

AU - Marsman, J. H.

AU - Pieters, R. T.

AU - Janssen, L. P. B. M.

AU - Beenackers, A. A. C. M.

PY - 1990/5

Y1 - 1990/5

N2 - A quantitative method for the determination of the degree of substitution (DS) of extruded benzylated starch is developed (DS = 0.01 – 0.40). Sample pretreatment by freezing the product in liquid nitrogen and a methanol extraction of the reaction components (e. g. benzyl chloride, benzyl alcohol) is described. Aqueous formic acid solutions of the starch products were analyzed both with UV analysis (λ = 259 nm.) and with a NMR “coaxial tubing” analysis technique. Both techniques showed similar results with good correlation and a standard deviation < 0.01 DS.

AB - A quantitative method for the determination of the degree of substitution (DS) of extruded benzylated starch is developed (DS = 0.01 – 0.40). Sample pretreatment by freezing the product in liquid nitrogen and a methanol extraction of the reaction components (e. g. benzyl chloride, benzyl alcohol) is described. Aqueous formic acid solutions of the starch products were analyzed both with UV analysis (λ = 259 nm.) and with a NMR “coaxial tubing” analysis technique. Both techniques showed similar results with good correlation and a standard deviation < 0.01 DS.

U2 - 10.1002/star.19900420507

DO - 10.1002/star.19900420507

M3 - Article

SN - 0038-9056

VL - 42

SP - 191

EP - 196

JO - Starch-Starke

JF - Starch-Starke

IS - 5

ER -

Determination of Degree of Substitution of Extruded Benzylated Starch by H‐NMR and UV Spectrometry

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