Starch corn Argo

Spectrum Details

Modality

NIR

Category

organic

Material Type

Sugar; Polysaccharide; Starch; Plant Carbohydrate

Sample ID

Starch, corn Argo GDS549

Collection Locality

Purchased from grocery store. Corn starch Argo brand.

Spectral Purity

1a2a3_4_ # 1= 0.2-3, 2= 1.5-6, 3= 6-25, 4= 20-150 microns

Composition / XRD

None.

Sample Description

This starch sample, a white powder, was purchased from a grocery store. It is a corn-derived product of Argo brand (ACH Food Companies, Inc.; Ankeny, Iowa). Starch is a carbohydrate polymer of glucose units joined together by O-glycosidic bonds. It consists of two types of molecules: the linear and helical amylose and the branched amylopectin. Amylose consists of repeating α-1,4-D-glucans (isomeric with the celluose structure of β-1,4-D-glucans). Branching in amylopectin takes place with α(1-6) bonds occurring every 24 to 30 glucose units, resulting in a soluble molecule that can be quickly degraded. In contrast, amylose contains very few of these branches, which causes it to be hydrolyzed more slowly but have higher density and be insoluble. Depending on the plant, starch generally contains 20 to 25% amylose and 75 to 80% amylopectin by weight. IMAGE_OF_SAMPLE:

X Units

cm⁻¹

Y Units

Absorbance

Data Points

2,126