MHA00PRY2

Preservative Resistant Yeast Broth

pkg of 2 mL Ampoule, A low pH selective medium for the detection of spoilage microorganisms in beverages

• Synonym(s): PRY broth
• UNSPSC Code: 41106226
• eCl@ss: 32160801
• NACRES: NA.74

Properties

• Quality Level: 100
• form: liquid
• shelf life: 9 mo.
• feature: ready-to-use
• packaging: pkg of 2 mL Ampoule; pack of 50 tests
• color: clear medium amber to yellow; yellow to colorless
• input: sample type cosmetics; sample type wine; sample type beverage(s); sample type sport drink; sample type bottled water; sample type soft drink; sample type beverage(s); sample type food(s); sample type cider; sample type beer
• pH: 3.6±0.2 (25.0 °C)
• application(s): bioburden testing; clinical; cosmetics; environmental; food and beverages; industrial qc (microbial monitoring); microbiology; water monitoring
• compatibility: for use with MF-method; for use with Microfil^®; for use with MicropreSure^®; for use with Milliflex^®
• shipped in: wet ice
• storage temp.: 2-8°C
• suitability: yeasts

Description

General description

Preservative Resistant Yeast broth is used for the detection of preservative resistant yeasts in water and beverage testing using the membrane filtration method. PRY Broth is a selective medium with a low pH used for the detection of spoilage microorganisms in beverages and water testing. It is used to selectively isolate and enumerate Zygosaccharomyces species.{16} The medium prevents growth of other yeasts such as Saccharomyces cerevisiae that are tolerant to lower levels of commonly used food preservatives. Spoilage resulting from growth of the yeast Zygosaccharomyces is widespread, which has caused significant economic losses to the food industry. Yeast extract in the medium provides the essential nutrients, while mannitol acts as source of fermentable carbohydrate and the Colonies appear yellow.

Application

PRY Broth is a low pH selective medium for the detection of spoilage microorganisms in beverages, Beer, Bottled Water, Cider, Soft Drink, Sport Drink and Wine. The media finds its application in Clinical, Cosmetics, Environmental Analysis, Food and Beverage and Industrial QC.

Packaging

2 mL plastic ampoules

Specifications

Incubation Temperature: 30 °C

Incubation Time: 24–48 hrs

Culture Medium

Preservative Resistant Yeast

Analysis Note

Colonies appear yellow

QC organisms
Z. bailii (ATCC 58445)

Target Microorganisms: Yeast, preservative resistant

Legal Information

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

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

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

Safety Information

• Storage Class: 12 - Non Combustible Liquids
• wgk_germany: WGK 1
• flash_point_f: Not applicable
• flash_point_c: Not applicable