85-1357-89　Phosphate Buffer, APHA, pH 7.2 (Butterfield's Buffered Phosphate Diluent) (Powder) 500g　P4071-50

特徴

• Intended Use:Phosphate Buffer, pH 7.2 is used for the preparation of microbiological dilution blanks.
• Product Summary:The formula for phosphate buffer is specified by the American Public Health Association (APHA) for use in diluting test samples. Phosphate Buffer, pH 7.2 is specified for use in diluting water, dairy products and food for microbiological methods. In the examination of water and dairy products the addition of magnesium chloride is recommended.
• This buffer is also referred to as Butterfield's Buffered Phosphate Diluent and recommended for examination of food (2). Phosphate Buffer, pH 7.2 stabilizes the pH of water used for dilutions.
• Principles of the Procedure:Phosphate Buffer, pH 7.2 is used in the preparation of dilution blanks for use in microbiological testing. Phosphate Buffer is used rather than unbuffered water in order to standardize this potential variable due to the wide variation in the pH of distilled water from multiple sources.
• Appearance:White to off-white, homogenous, free-flowing powder
• Solubility:Colorless, clear to slightly hazy, with or without trace precipitate
• pH:7.2 ± 0.2 (after autoclaving)
• Important Note: This product as supplied is intended for research use only, not for use in human, therapeutic or diagnostic applications without the expressed written authorization of United States Biological.