§173.357 用于酶制剂固定的固定剂(Materials used as fixing agents in the immobilization of enzyme preparations)

　　May be used as a fixing material in the immobilization of glucoamylase enzyme preparations from Aspergillus niger for use in the manufacture of beer.

　　May be used as a fixing material in the immobilization of:

　　1. Glucose isomerase enzyme preparations for use in the manufacture of high fructose corn syrup, in accordance with §184.1372 of this chapter.

　　2. Glucoamylase enzyme preparations from Aspergillus niger for use in the manufacture of beer. Residual ethylenimine in the finished polyethylenimine polymer will be less than 1 part per million as determined by gas chromatography-mass spectrometry. The residual ethylenimine is determined by an analytical method entitled “Methodology for Ethylenimine Detection in Polyethylenimine,” which is incorporated by reference in accordance with 5 U.S.C. 552（a） and 1 CFR part 51. Residual 1,2-dichloroethane in the finished polyethylenimine polymer will be less than 1 part per million as determined by gas chromatography. The residual 1,2-dichloroethane is determined by an analytical method entitled, “Methodology for Ethylenedichloride Detection in Polyethylenimine,” which is incorporated by reference in accordance with 5 U.S.C. 552（a） and 1 CFR part 51. Copies may be obtained from the Division of Petition Control, Center for Food Safety and Applied Nutrition （HFS–215）, 5100 Paint Branch Pkwy., College Park, MD 20740, or may be examined at the Center for Food Safety and Applied Nutrition's Library, 5100 Paint Branch Pkwy., College Park, MD 20740, or at the National Archives and Records Administration （NARA）. For information on the availability of this material at NARA, call 202–741–6030, or go to:http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.