Standard No.:	QB/T 1803-1993
English Name:	General methods of determination for industral enzymes
Chinese Name:	工业酶制剂通用试验方法
Professional Classification:	QB    Professional Standard - Light Industry
Issued by:	MOLI
Issued on:	1993-7-29
Implemented on:	1994-3-1
Status:	superseded
Superseded by:	QB/T 1803-2023 General test method for industrial enzyme preparations
Superseded on:	2023-11-1
Language:	English
File Format:	PDF
Word Count:	8500 words
Price(USD):	210.0
Delivery:	via email in 1 business day

1 Subject content and application scope This standard specifies the methods of determination for industrial enzymes. This standard is applicable to the test of industrial enzymes. 2 Normative references GB 601 Chemical reagent - Preparations of standard volumetric solutions GB 603 Chemical reagent - Preparations of reagent solutions for use in test methods GB 604 Chemical reagent - General method for the determination of pH ranges corresponding the colour transition of acid-base indicators GB 1250 Rules for expression and judgment of limiting values GB 4789.2 Microbiological examination of food hygiene - Detection of aerobic bacterial count GB 4789.3 Microbiological examination of food hygiene - Detection of coliform bacteria GB 4789.4 Microbiological examination of food hygiene - Examination of salmonella GB 4789.15 Microbiological examination of food hygiene - Enumeration of molds and yeasts GB 6004 Test sieves - Woven metal wire cloth (square opening series) GB 6682 Water for laboratory use - Specification GB 8170 Rules for rounding off of numerical values GB 8451 Method for limit test of heavy metals in food additives GB 9721 Chemical reagent - General rules for the molecular absorption spectrophotometry (ultraviolet and visible) 3 General and basic requirements 3.1 General requirements

1 Subject content and application scope 2 Normative references 3 General and basic requirements 4 Appearance and odor inspection 5 Test method for enzyme activity 6 Test method for drying loss 7 Test method for fineness (granularity) 8 Test method for bulk density 9 Test method for pH value 10 Test methods for disintegration (dissolution) time of detergent enzymes 11 Calculation method for enzyme activity preservation rate 12 Hygiene-required testing Annex A Test method for enzyme activity (supplementary) Additional explanation: