Common Name: Lecithin Tween 80 Nutrient Agar
English name:Lecithin Tween80 Nutrient Agar
Colony counting used in cosmetic bacterial testing.
Culture medium is a mixed nutritional product prepared by artificial methods, specifically for microbial cultivation, separation, identification, research, and preservation. Cow paste powder and peptone provide nitrogen sources and growth factors; Sodium chloride maintains cell osmotic pressure; Lecithin and Tween 80 are surfactants, and agar is the fixative.
It is made from medium materials such as peptone, beef extract, sodium chloride, Tween 80, lecithin, agar, etc., which are milled and packaged.
After pre-treatment according to industry regulations, the samples were inoculated into a culture medium at 36 ± 1 ℃ for 48 hours, and the results were observed.
Escherichia coli grows well, with white or grayish white colonies; Staphylococcus aureus grows well with yellow colonies.
1. This culture medium is only used for scientific research and research
2. The collected specimens must be inoculated and cultured as soon as possible to ensure accurate results.
3. The specimens used and their cultivation waste should be considered as potentially infectious substances and should be disposed of in accordance with the operating standards of infectious disease laboratories.
4-30 ℃, stored away from light.
【Period of validity】
The validity period is 3 years.
1. Safety technical specifications for cosmetics - Microbial testing methods, 2015 edition
2. SN/T 1538.1-2005 Guidelines for the Preparation of Culture Medium Part 1: General Principles for Quality Assurance of Laboratory Culture Medium Preparation
3. SN/T 1538.2-2007 Guidelines for the Preparation of Culture Media Part 2: Practical Guidelines for Performance Testing of Culture Media
4. WS/T 232-2002 Quality Inspection Procedures for Commercial Microbial Culture Media
5. GB 4789.28-2013 Quality Requirements for Culture Media and Reagents for Microbiological Testing of Food