Article: Isolation and characterization of Atriplex hortensis and sweet chenopodium quinoa starches

ABSTRACT

Starches from garden orach (Atriplex hortensis) and sweet quinoa (Chenopodium quinoa Willd. 'Surumi') seeds were isolated, examined for compositional characteristics, and compared with bitter quinoa (Chenopodium quinoa Willd.) starch. Garden orach and sweet quinoa seeds were similar in fat and ash contents, while garden orach seeds contained ==10% more protein. Starches were isolated from seeds following a 12-hr soak in dilute alkaline solution using a series of grinding, screening, centrifugation, and washing steps. Isolated starches viewed by scanning electron microscopy yielded angular, polygonal granules ==1-2 (mu)m in diameter. Starches

displayed typical A-type crystalline ...