Mitteleuropäische Brautechnische Analysenkommission

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Method Database (2)

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R-205.29.190

Zinc in Wort – AAS

/ RAW MATERIALS / Malt / AAS of Minerals

Purpose

Zinc is an essential trace element for yeast. It stimulates numerous metabolic reactions such as protein synthesis, nucleic acid and carbohydrate metabolism, phosphate transfer and...

Scope of application:

Suitable for analysis of all (laboratory) wort samples

Descriptors:

AAS

Atomabsorptionsspektrometer

atomic absorption spectrometer

cell reproduction

Congress wort

Kongresswürze

metabolic reactions

Spurenelement

Stoffwechselvorgänge

trace element

wort

zinc

Zink

Principle

Zinc in wort is measured using the AAS technique by directly aspirating the diluted sample into an acetylene oxygen flame or through electrothermal atomization; the measurement is made at 213.9 nm.

M-350.23.508

Yeast – Second enrichment of beer-spoilage bacteria

/ MICROBIOLOGY / Beer / Yeast

Purpose

Foreign microorganisms in industrial yeasts are primarily obligate beer-spoilage organisms (gram-positive lactic acid bacteria such as lactobacilli and pediococci as well as gram-negative anaerobes) and...

Scope of application:

Process samples that contain yeast

Descriptors:

anaerob

anaerobic

Anreicherung

Beerspoiling

beer-spoiling

bierschädlich

bouillon

enrichment

NBB

Pre-damaged

Spuren

Traces

Vorgeschädigt

Principle

Anaerobic cultivation, dark-field microscopy of the sample

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