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A new class of hydroxypropyl starch, γ‐hydroxypropyl starch (γ‐HPS), is synthesized by using 3‐chloropropanol as the etherifying reagent. Two independent procedures for the determination of the number of moles of alkylene oxide combined per anhydroglucose unit (molar substitution, MS) in γ‐HPS are described. The feasibility of the Zeisel‐gas chromatographic technique and colorimetric determination...
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