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1.09477

Supelco

Buffer solution

(di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour: green traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

Synonyme(s) :

Buffer solution coloured:green (di-sodium hydrogen phosphate/potassium dihydrogen phosphate)

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500 ML
64.80 CHF
4 L
378.00 CHF
10 L
537.00 CHF

64.80 CHF

Date d'expédition estimée le01 juin 2025

Devis pour commande en gros
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Sélectionner une taille de conditionnement

Changer de vue
500 ML
64.80 CHF
4 L
378.00 CHF
10 L
537.00 CHF

About This Item

Code UNSPSC :
12161706
Nomenclature NACRES :
NA.25

64.80 CHF

Date d'expédition estimée le01 juin 2025

Devis pour commande en gros

Qualité

certified reference material

Niveau de qualité

300

Gamme de produits

Certipur®

pH

7.0 (20 °C in H2O)

Densité

1.00 g/cm3 at 20 °C

Application(s)

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

Format

mixture

Température de stockage

15-25°C

Catégories apparentées

Description générale

The green-colored di-sodium hydrogen phosphate/potassium dihydrogen phosphate buffer solution is gravimetrically prepared using high-quality reagents at a registered calibration laboratory. Its pH value of 7.00 at 20°C is measured following a 5-point calibration method, using a combined glass electrode. The measurement is made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. Its pH value is strongly dependent on the temperature and therefore a constant temperature must be maintained during its use.

Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.

Download your certificate at http://www.sigma-aldrich.com to view certified values, including uncertainty and expiry date.

Application

The buffer solution is meant to be used as a calibration standard for pH measuring instruments or pH electrodes and as a control for measuring the pH value of solutions.

Caractéristiques et avantages

  • Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Directly traceable to secondary reference standard from NIST and primary certified reference standard from PTB
  • Ready-to-use solution
  • Available in a sealed plastic bottle to prevent contamination
  • Accompanied with a detailed and batch-specific certificate of analysis (CoA) for an effective audit
  • Product label follows the ISO Guide 31 and contains information about ordering number, article description, lot number, safety data, and expiry date
  • Packaging material subjected to comprehensive stability studies as per ISO Guide 35

Informations légales

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

En option

Réf. du produit
Description
Tarif

1.09407

Buffer solution, (potassium dihydrogen phosphate/disodium hydrogen phosphate)traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

1.99002

Solution tampon, (potassium dihydrogen phosphate/di-sodium hydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

1.09439

Solution tampon, (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), traceable to SRM from NIST and PTB pH 7.00 (20°C) Certipur®

1.99057

Buffer solution, (di-sodium hydrogen phosphate/potassium dihydrogen phosphate), colour:yellowtraceable to SRM from NIST and PTB pH 7.00 (25°C) Certipur®

1.99068

Buffer solution, di-sodium hydrogen phosphate/potassium dihydrogen phosphate, traceable to NIST, traceable to PTB, pH 6.86 (25 °C), Certipur®

Certificats d'analyse (COA)

Recherchez un Certificats d'analyse (COA) en saisissant le numéro de lot du produit. Les numéros de lot figurent sur l'étiquette du produit après les mots "Lot" ou "Batch".

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Questions

1–2 of 2 Questions  

  1. How can I determine the shelf life / expiration / retest date of this product?

    1 answer

    1. 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/449/386/product-dating-information-mk.pdf

      Helpful?

  2. How is shipping temperature determined? And how is it related to the product storage temperature?

    1 answer

    1. 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

      Helpful?

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