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Merck
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重要文件

1.99006

Supelco

Buffer solutions

traceable to NIST, traceable to PTB, pH 4.01 (25 °C, phthalate), pH 7.00 (25 °C, phosphate), pH 10.00(borate), Certipur®

同義詞:

Buffer solution pH 4.01 (25 °C, phthalate), pH 7.00 (25 °C, phosphate), pH 10.00(borate)

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About This Item

分類程式碼代碼:
12161703
NACRES:
NA.25
暫時無法取得訂價和供貨情況

等級

certified reference material

品質等級

300

agency

traceable to NIST
traceable to PTB

產品線

Certipur®

pH值

10.00(borate)
4.01 (25 °C, phthalate)
7.00 (25 °C, phosphate)

應用

environmental
food and beverages
general analytical
industrial qc
pharmaceutical

形式

mixture

儲存溫度

15-25°C

相關類別

一般說明

A set of 3 certified buffer solutions of pH 4.01(phthalate), 7.00 (phosphate), and 10.00 (borate)? gravimetrically prepared at a registered calibration laboratory with high-quality reagents and water. The pH values of the buffers are measured using a combined glass electrode, following a 5-point calibration method. The measurements are made following DIN 19268 using reference buffer solutions compliant to DIN 19266, NIST, IUPAC, Ph. Eur, and USP. The pH values are strongly dependent on the temperature and therefore a constant temperature must be maintained during their 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.

應用

They are used as standards to calibrate pH measuring instruments or pH electrodes and as controls to measure the pH of other solutions.

特點和優勢

  • Measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory
  • Traceable to secondary reference standards from NIST and primary certified reference standards from PTB
  • Ready-to-use solutions available in 30 mL sachets
  • 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
  • pH 4.00 and pH 6.99 buffer CRMs in the pack are accurate upto +/- 0.02 at 25 °C and the pH 10.01 buffer CRM is accurate upto +/-0.03 at 25 °C

法律資訊

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

儲存類別代碼

10-13 - German Storage Class 10 to 13

分析證明 (COA)

輸入產品批次/批號來搜索 分析證明 (COA)。在產品’s標籤上找到批次和批號，寫有 ‘Lot’或‘Batch’.。

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Questions

1–4 of 4 Questions  

  1. 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?

  2. 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?

  3. Hi. I have a question: How can we use these buffers in similar pickets? Are they one-time use?

    1 answer

    1. Product 1.99006, is Certipur® buffer solutions are single-use sachets. The instructions can be found in the link below:
      https://www.sigmaaldrich.com/deepweb/assets/sigmaaldrich/product/documents/406/790/crm-buffer-solutions-ds8577en-ms.pdf

      If additional information is needed. Please contact Technical Services directly.

      Helpful?

  4. This product is traceable to NIST, but does it comply with the SR EN 17034 standard?

    1 answer

    1. This product is measured and qualified at an ISO/IEC 17025 and ISO 17034 accredited laboratory. Please see the "Features and Benefits" section of the Product Detail Page for more information. While 'SR EN' 17034 is not specifically cited, full traceability and accreditation information is published in the product Certificate of Analysis.

      Helpful?

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