U.S. flagAn official website of the United States government
                    Here's how you know **Official websites use .gov**
                            
                            A **.gov** website belongs to an official government organization in the United States.
 **Secure .gov websites use HTTPS**
                            
                            A **lock** (                            
                              A locked padlock                                                      
                            
                            ) or **https://** means you’ve safely connected to the .gov website. Share sensitive information only on official, secure websites.


Menu Agricultural Research Service
						
                    U.S. DEPARTMENT OF AGRICULTURE
 Cell Wall Biology and Utilization Research: Madison, WI
 close



    Research

                    Research Projects
                                    Publications
                                    Collaborations
                                    News
                People

                    Staff Listing
                                    CareersSearch small
                    Search
            
            ARS Home
                                About ARS
                                Contact Us




ARS Home Midwest Area Madison, Wisconsin U.S. Dairy Forage Research Center Cell Wall Biology and Utilization Research Research Publications at this Location





- ARS National Programs
- Search for a scientific manuscript
- Search for a research project
- ARS Software
- Programs and Projects
- Collaborations
- Subjects of Investigation
- Publications

Title:   Author  item
                                            Hall, Mary Beth
  Submitted to: Symposium Proceedings
                                    Publication Type: Proceedings
                                    Publication Acceptance Date: 5/2/2008
                                    Publication  Date: 6/9/2008
                                    Citation: Hall, M. 2008. Importance and pitfalls of starch assays: selection of methods. In: Proceedings of the Annual Meeting of the Midwest Section of the American Association of Analytical Chemists, June 9-11, 2008, Bozeman, Montana. p. 20.Interpretive Summary:
                                Technical Abstract: Starch analyses provide valuable information on diverse samples, from nutritional values of human foods and animal feeds to data for estimating yields of ethanol from grain. However, starch methods differ in their efficacy, with common methods differing in recovery by 3 to 7 percentage units. Reduced recovery is associated with incomplete gelatinization, physical barriers to enzymatic attack (e.g., formation of sample microgels or lumps), hydrolysis of samples at neutral pH, microbial predation of glucose, and grinding methods that do not adequately reduce particle size. Inflated starch values are usually associated with detection of glucose from nonstarch sources. To maximize accuracy, samples should be ground to pass the 0.5-mm screen on cutter mills, hydrolyses should be performed at mildly acidic pH (pH 4.5-5.0), and end-product detection should be specific for glucose released from starch. Methods that minimize handling and transfers can also increase accuracy and throughput.


Return to top


Connect with ARS Sign up


ARS Home
                            USDA.gov
                            Plain Writing
                            Policies & Links
                            Civil Rights Statements
                            FOIA
                            Accessibility Statement
                            Privacy Policy
                            Non-Discrimination Statement
                            Quality of Information
                            USA.gov
                            WhiteHouse.gov