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Merck
CN

09136

Tryptophan Broth

NutriSelect® Plus, according to ISO, powder, for Escherichia coli, pack of 500 g, suitable for microbiology

Synonym(s):

Tryptone/Tryptophan Medium

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About This Item

NACRES:
NA.85
UNSPSC Code:
41171607
Manufacturer/tradename:
NutriSelect® Plus
Agency:
according to ISO 10273:2017, according to ISO 16654:2001, according to ISO 6579-1:2017, according to ISO
Form:
powder
Suitability:
Escherichia coli, coliforms
Application(s):
environmental
food and beverages
water monitoring, microbiology

Key Documents

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agency

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

sterility

non-sterile

form

powder

Quality Level

200

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

packaging

pack of 500 g

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.

Other Notes

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

11 - Combustible Solids

wgk

WGK 1

Regulatory Information

动植物来源培养基
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Certificates of Analysis (COA)

Lot/Batch Number
BCCN2024
BCCL9931
BCCJ9043
BCCG5188
BCCD6317

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