*Price of the test:
$150 per analysis
This method is applicable to grains, ingredients, and lyophilized-finished products.
Matrices that have the potential to gelatinize in the presence of water (i.e. high concentrations of psyllium or konjac).
The range of this method is 2 to 64% resistant starch.
Sample Size Requirements:
7-9 business days
Is rush testing available?
Samples are incubated with pancreatic a-amylase and amyloglucosidase (AMG) and further treated to remove the nonresistant starch. The resistant starch is then dissolved in KOH, neutralized with acetate buffer, and is quantitatively hydrolyzed to glucose with AMG. Glucose is measured with glucose oxidase/peroxidase reagent (GOP) on a spectrophotometer. The absorbance of this solution at 510 nm is proportional to the resistant starch content of the sample.
Information Required by Submitter:
Please provide estimates for samples containing high (> 10%) resistant starch. The method must be adjusted slightly for samples with high resistant starch.
This method measures RS2 (granular) and RS3 (retrograded) starches. RS1 starches are not detected by this method. Applicability of this method to RS4 (chemically-cross linked) type starches must be determined on a case-by-case basis.
If you have questions about our testing services, please contact us at +1 (800) 245-5615.
*Prices and offerings are subject to change without notice.