Hydroxypropyl starch ether (HPS) is a white fine powder obtained from natural plants through modification, high etherification and spray drying, without plasticizer.

It is completely different from ordinary starch or modified starch. Hydroxypropyl starch is a chemically modified starch that undergoes etherification reaction between epichlorohydrin and starch, replacing the hydroxyl groups in the polymer structure of starch to become an etherified starch.

The properties of starch derivatives with hydroxypropyl substituents include that the glucose units that make up starch have three hydroxypropyl groups that can be substituted, thus obtaining products with different degrees of substitution.

Test sample

Pharmaceutical preparations, food additives, cosmetics, biologics, health supplements, nutritional supplements, dairy beverages, starch, base material capsules, tablets, injections, suppositories, gels, emulsion ointments, pharmaceutical coating adhesives, medical dressings, biocompatible materials, food packaging materials, chemical reagents, biodegradable materials, textile processing agents, agricultural additives, cleaning agents.

Testing items

Content determination, moisture content pH value determination, viscosity testing, solubility testing, particle size distribution, thermal stability testing, weight loss testing, color determination, purity analysis, heavy metal detection, microbial limit testing, chloride ion content; Sulfate content; Nitrogen content determination, emulsification test, foam stability test, heat resistance test, rheological property test, dispersion test, sedimentation test, biocompatibility test, formula stability test, antioxidant test, odor test, turbidity test.

test method

Liquid chromatography method - used for quantitative analysis of hydroxypropyl starch ether content.

Gas chromatography - used for analyzing volatile components and their content.

UV visible spectrophotometry - determination of the concentration of hydroxypropyl starch ether by light absorption.

Atomic absorption spectroscopy - used for detecting heavy metal content.

Electrochemical analysis method - determining specific components through changes in current.

Titration method - quantitative determination of hydroxypropyl starch ether content through chemical reaction.

Fluorescence spectroscopy - analyzing sample components through fluorescence characteristics.

Mass spectrometry - used for molecular weight and structural analysis.

Infrared spectroscopy - analyzing compound structure through infrared absorption characteristics.

Capillary electrophoresis method - used for separating and quantitatively analyzing components in samples.

Colorimetric method - determining sample concentration through color changes.

Thermogravimetric analysis - analyzing the thermal stability and compositional changes of materials.

Differential Scanning Calorimetry - Determination of Thermal Properties of Hydroxypropyl Starch Ether.

Turbidity measurement method - measuring the turbidity of a sample to evaluate purity.

testing instrument

Liquid chromatograph, gas chromatograph, UV visible spectrophotometer, atomic absorption spectrometer, electrochemical analyzer, titrator, fluorescence spectrometer, mass spectrometer, infrared spectrometer, capillary electrophoresis analyzer, colorimetric thermogravimetric analyzer, differential scanning calorimeter, turbidity meter, conductivity meter, ion chromatograph, microbial detector, stability tester, chromatography-mass spectrometer, rheometer, cell culture box, biocompatibility tester, amino acid analyzer, solubility analyzer, volatile component analysis, instrument viscosity meter.