Abstract：Starch microspheres are polymer microspheres, which can be used in pharmaceutical and
cosmetic field. Herein, a novel quinoa starch microsphere was prepared via inverse emulsion cross?
linking method and the microsphere characterization was detected. Quinoa starch was used as raw
materials, epoxy chloropropane as crosslinking agent, Span60 as emulsifier, soybean oil as oil phase.
The results indicated the optimal preparation process: quinoa starch mass fraction was 9%, soybean
oil phase dosage was 100 mL/120mL, crosslinking agent dosage was 0.6 mL/120mL, stirring speed
was 400 r/min, emulsifier dosage was 3 mg/mL, and reaction time was 3 h. Under these conditions,
the methylene blue adsorption capacity of quinoa starch microspheres was 0.828 mg/g. The perfor?
mance characterization results indicated that the particle size distribution of quinoa starch micro?spheres was uniform, with an average particle size of 28.5 μm, and a large number of small pores
were distributed on the surface of quinoa starch microspheres.
