標準編號:	GB/T 5009.159-2003
中文名稱:	食品中還原型抗壞血酸的測定
英文名稱:	Determination of reductive-form ascorbic acid in foods
中標分類:	C53    食品衛生
行業分類:	GB    國家標準
ICS分類:	67.040 67.040    食品綜合 67.040
發布機構:	國家質量技術監督局
發布日期:	2003-8-11
實施日期:	2004-1-1
標準狀態:	superseded
被新標準替代:	GB 5009.86-2016 食品安全國家標準 食品中抗壞血酸的測定
被替代日期:	2017-3-1
作廢日期:	2017-03-01
翻譯語言:	英文
文件格式:	PDF
中文字符數:	2000 字
翻譯價格(元):	150.0
交付時間:	付款后 1 個工作日

1 Scope This standard specifies spectrophotometric method for the determination of ascorbic acid in foods. It is applicable to the determination of reductive-form ascorbic acid in foods. It is not applicable to the determination of dehydrogenation-form ascorbic acid. 2 Principle In acetic acid solution, the reaction of ascorbic acid with the fast blue B salt will produce yellow derivatives of oxalyl dihydrazide-2-hydroxy butyl ester. Carry out determination of absorbance at the maximum absorption wavelength of 420nm, and compare the quantitative measurement with reference series. 3 Reagent