Phosphate buffer

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.

Dissolve 34 g in 1 litre distilled water. Dispense and sterilize by autoclaving at 121°C for 15 minutes. The pH, after autoclaving and cooling to room temperature should be 7.2 ± 0.2.

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

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

Phosphate Buffer is a microbiological culture medium designed for the preparation of dilutions and blanks for the examination of water, dairy products, foods, eating utensils, and other specimens in food and beverage industries.

NutriSelect^® Plus are powdered culture media offering

• Quality control with growth promotion test according to industry standards
• Quality assurance acc. to ISO 9001
• Cost-efficient powdered media

Phosphate Buffer, pH 7.2, is prepared according to APHA guidelines and is primarily used for diluting test samples. It is specified for microbiological methods involving the dilution of water, dairy products, and food samples. Additionally, Phosphate Buffer can be used with the addition of magnesium chloride, as recommended by APHA and FDA. This medium is also referred to as Butterfield’s Buffered Phosphate Diluent when used without magnesium chloride. Phosphate Buffer is preferred over unbuffered water as it helps standardize the pH variations commonly observed in distilled water from different sources.