Phosphate buffer by itself is not generally autoclaved. When phosphate buffers are autoclaved, it is common to see a precipitate form at the bottom of the bottle. When phosphate buffers are a minor component in a solution to be autoclaved, the formation of precipitate does not seem to be a common occurrence. Instead of autoclaving the phosphate-buffered saline (PBS), sterilization can be achieved by passing the solution through a 0.2 micron vacuum filter. There are also sterile filtered options for PBS: https://www.sigmaaldrich.com/substance/phosphatebufferedsaline1234598765
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Nom du produit
Solution tampon phosphate, powder, pH 7.4, for preparing 1 L solutions
form
powder
storage condition
dry at room temperature
color
white
pH
7.4
solubility
water: soluble
density
1.19 g/cm3 at 20—25 °C
1.22 g/cm3 at 20—25 °C
application(s)
diagnostic assay manufacturing
life science and biopharma
sample preparation
Quality Level
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1 of 4
Cet article | P38135 | P3688 | P3744 |
|---|---|---|---|
| Quality Level 200 | Quality Level 200 | Quality Level 200 | Quality Level 200 |
| application(s) diagnostic assay manufacturing | application(s) diagnostic assay manufacturing | application(s) diagnostic assay manufacturing | application(s) diagnostic assay manufacturing |
| form powder | form powder | form powder | form powder |
| pH 7.4 | pH 7.4 | pH 7.4 | pH 7.6 (25 °C) |
| solubility water: soluble | solubility water: soluble | solubility water: soluble | solubility - |
| density 1.19 g/cm3 at 20—25 °C, 1.22 g/cm3 at 20—25 °C | density - | density - | density - |
Application
- dans les solutions de lavage d'une procédure d'immunofluorescence[1].
- pour mettre en suspension des cellules bactériennes[2].
- durant des procédures de fixation et d'immunocoloration[3].
- pour rincer des tissus fixés et créer un environnement tampon adapté dans un procédé d'immunolocalisation[4].
- comme diluant pour évaluer les performances d'un kit de test ELISA[5].
- comme tampon dans une procédure d'immunohistochimie.[6][3]
Features and Benefits
- Produit de grande qualité convenant à de nombreuses applications de recherche.
- Peut être ajouté aux tampons de biologie et de biochimie.
- Forte solubilité dans l'eau.
General description
Le pouvoir tampon du PBS, assuré par l'équilibre phosphate-acide phosphorique, crée un environnement de pH stable crucial pour optimiser l'activité des enzymes et divers processus biologiques. Le PBS est donc un choix idéal pour la préparation de réactifs, la dialyse de protéines et l'immunohistochimie, garantissant des résultats expérimentaux reproductibles et fiables. Outre la biologie cellulaire, le PBS peut aussi être utilisé dans divers autres domaines comme la création de tampons ELISA sur mesure pour optimiser les interactions anticorps-antigène. Il peut aussi servir de tampon de migration pour la chromatographie d'affinité avec protéine A/G, facilitant la purification des anticorps en se basant sur leur liaison à un antigène spécifique. En hématologie et en biochimie, le PBS est fréquemment employé pour laver les cellules et les tissus.
En résumé, le PBS se démarque comme un outil indispensable tant dans la recherche en biologie qu'en biochimie, garantissant isotonicité, pouvoir tampon, simplicité et stabilité. Ses différentes applications en biologie cellulaire, dans la préparation de réactifs, la purification de protéines et divers tests biologiques montrent à quel point il fait progresser les connaissances scientifiques et notre compréhension.
Other Notes
Packaging
Preparation Note
Classe de stockage
13 - Non Combustible Solids
wgk
WGK 3
flash_point_f
Not applicable
flash_point_c
Not applicable
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When using in cell culture do you recommend autoclaving and filter sterilizing? Or only autoclave?
1 réponse-
Utile ?
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How can I determine the shelf life / expiration / retest date of this product?
1 réponse-
If this product has an expiration or retest date, it will be shown on the Certificate of Analysis (COA, CofA). If there is no retest or expiration date listed on the product's COA, we do not have suitable stability data to determine a shelf life. For these products, the only date on the COA will be the release date; a retest, expiration, or use-by-date will not be displayed.
For all products, we recommend handling per defined conditions as printed in our product literature and website product descriptions. We recommend that products should be routinely inspected by customers to ensure they perform as expected.
For products without retest or expiration dates, our standard warranty of 1 year from the date of shipment is applicable.
For more information, please refer to the Product Dating Information document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/418/501/product-dating-information-06-25-mk.pdfUtile ?
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Expliquen me como preparar la solución a partir del polvo
1 réponse-
The contents of each package are sufficient to prepare 1 Liter. To prepare, fill the vessel of choice (beaker, graduated cylinder, etc) to approximately 800 mL of distilled or deionized water. Place the vessel on a magnetic stir plate and add the appropriate-size stir bar. While stirring, add the contents of 1 package. Add the required additional volume of water to 1 liter. Allow the solution to stir until the contents are completely dissolved and no participates are present.
Utile ?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 réponse-
Products may be shipped at a different temperature than the recommended long-term storage temperature. If the product quality is sensitive to short-term exposure to conditions other than the recommended long-term storage, it will be shipped on wet or dry-ice. If the product quality is NOT affected by short-term exposure to conditions other than the recommended long-term storage, it will be shipped at ambient temperature. As shipping routes are configured for minimum transit times, shipping at ambient temperature helps control shipping costs for our customers. For more information, please refer to the Storage and Transport Conditions document: https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/marketing/global/documents/316/622/storage-transport-conditions-mk.pdf
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Is autoclaving necessary for PBS P3813 before conducting the presence-absence test for coliform bacteria?
1 réponse-
No, phosphate buffers by themselves are generally not autoclaved due to the common occurrence of precipitate formation. Autoclaving is commonly used in microbiology, but if your test method only requires sterilization without specifying autoclaving, filter sterilization might be a better option to consider.
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Does P3813 PBS (Phosphate Buffered Saline) contain calcium or magnesium?
1 réponse-
The composition of P3813 PBS Phosphate Buffered Saline is considered proprietary, but the website provides the following information. When one pouch is dissolved in one liter of distilled or deionized water, it yields 0.01 M phosphate buffered saline with a pH of 7.4 at 25°C, consisting of NaCl at 0.138 M and KCl at 0.0027 M.
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Good morning, I would like to know what PKG means in kg. I would also like information about the validity of the solution resulting from the dissolution of the solid in question. Thanks
1 réponse-
PKG means package. One package is one pouch. As per its COA: https://www.sigmaaldrich.com/certificates/sapfs/PROD/sap/certificate_pdfs/COFA/Q14/P3813-1PAK0000291289.pdf, each pouch contains 9.07-10.00 g of powder. And the pH and dissolution time are tested to validate the solution.
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hi, what kg is in one package?
1 réponse-
The amount of powder to prepare 1 liter of buffer is approximately 9.55 grams.
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Does this PBS contain Ca and Mg?
1 réponse-
No, the components of this formulation do not include calcium or magnesium.
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What is the salinity of Phosphate buffer saline P3813?
1 réponse-
As mentioned on the product detail page, the contents of one pouch, when dissolved in one liter of distilled or deionized water, will yield 0.01 M phosphate buffered saline (NaCl 0.138 M; KCl - 0.0027 M); pH 7.4, at 25 °C.
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