70194

Tryptone Water

suitable for microbiology, NutriSelect^® Plus

• NACRES: NA.74

Properties

• sterility: non-sterile
• Quality Level: 200
• product line: BioChemika
• form: powder
• shelf life: limited shelf life, expiry date on the label
• composition: sodium chloride, 5.0 g/L ; tryptone (tryptic hydrolysate of casein), 10.0 g/L
• manufacturer/tradename: NutriSelect^® Plus
• technique(s): microbe id | specific enzyme detection: suitable; microbiological culture: suitable
• final pH: 7.5±0.2 (25 °C)
• application(s): environmental; food and beverages; sample preparation; water monitoring; microbiology
• suitability: nonselective for Enterobacter spp.; nonselective for Escherichia coli; nonselective for Proteus spp.; nonselective for Salmonella spp.; nonselective for Staphylococcus spp.; nonselective for bacteria (General Media); nonselective for coliforms; nonselective for enterobacteriaceae

Description

Application

A liquid medium for the detection of indole-forming microorganisms due to its high content of tryptophan, it is more reliable than peptone water for this purpose.

Tryptone water is primarily used for the cultivation and maintenance of fastidious aerobic and facultative microorganisms such as Escherichia coli and Pseudomonas species.

Preparation Note

Add 15 g to 1 litre of distilled water. Mix well, distribute into final containers and sterilize by autoclaving at 121°C for 15 minutes.

Other Notes

Direct plating method for enumeration of E. coli in water

Footnote

We offer two media types: the superior granulated GranuCult^® and the cost-efficient powdered NutriSelect^® culture media, depending on your needs.
The designations basic, plus, or prime are added to indicate the quality control level, from basic quality control to standard QC plus to prime for full regulatory compliance.

Legal Information

GRANUCULT is a registered trademark of Merck KGaA, Darmstadt, Germany

NutriSelect is a registered trademark of Merck KGaA, Darmstadt, Germany

Safety Information

• Storage Class Code: 11 - Combustible Solids
• WGK: WGK 3
• Flash Point(F): Not applicable
• Flash Point(C): Not applicable
• Personal Protective Equipment: dust mask type N95 (US), Eyeshields, Gloves