MilliporeSigma
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09136

Millipore

Tryptophan Broth

suitable for microbiology, NutriSelect® Plus

Synonym(s):
Tryptone/Tryptophan Medium
NACRES:
NA.85

Agency

according to ISO 10273:2017
according to ISO 16654:2001
according to ISO 6579-1:2017

Quality Level

sterility

non-sterile

form

powder

shelf life

limited shelf life, expiry date on the label

composition

casein enzymic hydrolysate, 10.0 g/L
sodium chloride, 5.0 g/L
DL-tryptophan, 1.0 g/L

manufacturer/tradename

NutriSelect® Plus

final pH

7.5±0.2 (25 °C)

application(s)

environmental
food and beverages
water monitoring

microbiology

suitability

Escherichia coli
coliforms

Related Categories

Application

Medium to perform the indole test to confirm E. coli in water acc. EN IS0 9308-1:2000.

Preparation Note

Dissolve 16g Tryptophan Broth in one liter water by heating. Dispense 3 ml per test tube. Close the tubes with cotton plugs, plastic or metal caps. Autoclave for 15 min at 121 ± 3°C.

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

Storage Class Code

11 - Combustible Solids

WGK

WGK 1

Flash Point(F)

Not applicable

Flash Point(C)

Not applicable

Certificate of Analysis

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Certificate of Origin

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