CHEMICAL METHOD FOR THE DETERMINATION OF STARCH IN POLYETHYLENE

被引：4

作者：

FRATZKE, AR ^{[1
]}

SUNG, W ^{[1
]}

EVANGELISTA, RL ^{[1
]}

NIKOLOV, ZL ^{[1
]}

机构：

[1] IOWA STATE UNIV SCI & TECHNOL,CTR CROPS UTILIZAT RES,DEPT FOOD SCI & HUMAN NUTR,AMES,IA 50011

来源：

ANALYTICAL LETTERS | 1991年 / 24卷 / 05期

关键词：

STARCH DETERMINATION; DEGRADABLE PLASTICS; POLYETHYLENE;

D O I：

10.1080/00032719108052948

中图分类号：

O65 [分析化学];

学科分类号：

070302 ; 081704 ;

摘要：

A chemical/spectrophotometric procedure has been developed that allows the determination of starch and some modified starches (as glucosyl residues) in polyethylene films and pellets. The method uses samples containing up to 60 mg polyethylene and determines the anhydrous starch content of samples possessing starch loads in the range typically encountered with degradable plastics (5-40%). The method consists of dissolution of the polyethylene component into decahydronapthalene (decalin) at 150-degrees-C followed by solubilization with partial hydrolysis of the starch component in 1 M HCl at 100-degrees-C. An aliquot of the resulting starch hydrolyzate is analyzed for total carbohydrate using the phenol-sulfuric acid method. The method has been tested on two sets of specially prepared starch-polyethylene films as well as on several commercial products.

引用

页码：847 / 856

页数：10

共 7 条

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