Standard No.:	GB 5413.13-2010
English Name:	National food safety standard Determination of vitamin B6 in foods for infants and young children,milk and milk products
Chinese Name:	食品安全国家标准 婴幼儿食品和乳品中维生素B6的测定
Chinese Classification:	X09    Hygiene, safety and labor protection
Professional Classification:	GB    National Standard
Issued by:	MOH
Issued on:	2010-3-26
Implemented on:	2010-6-1
Status:	superseded
Superseded by:	GB 5009.154-2016 National food safety standard-Determination of vitamin B6 in foods
Superseded on:	2017-6-23
Superseding:	GB 5413.13-1997 GB/T 5413.13-1997 Determination of vitamin B6 in foods for infants and young children,milk and milk products
Language:	English
File Format:	PDF
Word Count:	2000 words
Price(USD):	214.0
Delivery:	via email in 1 business day

1 Scope This standard specifies the determination method for urease in foods and milk products for infants and young children. This standard is applicable to qualitative determination of urease in foods and milk products for infants and young children. 2 Principle Under proper PH value and temperature, urease catalyzes urea into ammonium carbonate, which produces ammonium hydroxide under alkaline conditions, which produces brown ammonium iodide double mercury by reacting with mercury potassium iodide double salt in Nessler's reagent. 3 Reagents and Materials

Foreword I 1 Scope 2 Principle 3 Reagents and Materials 4 Instrument and Equipment 5 Analytical Procedures 6 Expression of Analysis Result 7 Detection Limit