This standard has not been validated for use outside of the specified temperature range.
1.88054
Standardowy piekarnik wodny 1%
Certified Reference Material for KF oven method Aquastar®
Synonim(y):
TM=["AQUASTAR"] Water Standard Oven 1% dla metody piekarnika KF
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| Do Państwa/SKU | Dostępność | Cena netto |
|---|---|---|
5 g | Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności | 856,00 zł |
Informacje o tej pozycji
NACRES:
NA.24
UNSPSC Code:
41115601
856,00 zł
Skontaktuj się z Obsługą Klienta, aby uzyskać informacje na temat dostępności
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certified reference material
Quality Segment
agency
ISO 17025, 17034
product line
Aquastar®
form
solid
reaction suitability
reaction type: water standard for Karl Fischer titration
packaging
glass bottle of 5 g
technique(s)
Karl-Fischer titration: suitable
bulk density
460 kg/m3
format
neat
storage temp.
15-25°C
General description
It is a solid standard prepared gravimetrically from high-purity reagents. The water content of it is determined by coulometric Karl Fischer oven method at 170°C with an extraction time of 600 seconds. Additionally, its measured water content is verified by thermogravimetric analysis. Unlike other solid standards such as tartrate, lactose, or citrate, the water standard oven 1% has significantly lower water content and can be used over a broad temperature range of 150°C to 400°C due to its inorganic composition. It is characterized in accredited quality control (QC) laboratory according to DIN EN ISO/IEC 17025.
Please visit ISO certificates and Site Quality Self-Assessments to access the current certificates of accreditation.
In our effort to be more sustainable, we′re going digital with COAs-download them directly from our website. Download your certificate at https://www.sigmaaldrich.com/US/en/documents-search to view certified values, including uncertainty and expiry date.
In our effort to be more sustainable, we′re going digital with COAs-download them directly from our website. Download your certificate at https://www.sigmaaldrich.com/US/en/documents-search to view certified values, including uncertainty and expiry date.
Application
Water standard oven 1% is used as certified reference material to check the accuracy of coulometric and volumetric water determinations, according to ISO 9001 chapter 7.1.5 “Monitoring and measuring resources”, using Karl Fischer oven and thermobalances. But its low water content of 1% makes it particularly suitable for water determinations using Karl Fischer oven with a coulometer.
Features and Benefits
- Packed in convenient glass bottles with the material subjected to stability and homogeneity studies following ISO 17034 and ISO Guide 35
- Supplied with a batch-specific digital certificate of analysis (CoA) having data on exact measured water, uncertainty, method of analysis, measuring method, and minimum shelf life
- Characterized in an ISO/IEC 17025 and ISO 17034 accredited calibration laboratory
- Directly traceable to SI unit (kg)
Other Notes
Certyfikowany materiał odniesienia Karla Fischera do metody piecowej
Legal Information
AQUASTAR is a registered trademark of Merck KGaA, Darmstadt, Germany
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Ta pozycja | |||
|---|---|---|---|
| grade certified reference material | grade reference material | grade certified reference material | grade certified reference material |
| agency ISO 17025, 17034 | agency ISO 17025 | agency ISO 17025, 17034 | agency ISO (17025, 17034) |
| format neat | format single component solution | format single component solution | format single component solution |
| bulk density 460 kg/m3 | bulk density - | bulk density - | bulk density - |
| packaging glass bottle of 5 g | packaging ampule of 10 × 8 mL | packaging ampule of 10 × 8 mL | packaging ampule of 10 × 8 mL |
| technique(s) Karl-Fischer titration: suitable | technique(s) Karl-Fischer titration: suitable | technique(s) Karl-Fischer titration: suitable | technique(s) Karl-Fischer titration: suitable |
Klasa składowania
13 - Non Combustible Solids
flash_point_f
Not applicable
flash_point_c
Not applicable
Certyfikaty analizy (CoA)
Poszukaj Certyfikaty analizy (CoA), wpisując numer partii/serii produktów. Numery serii i partii można znaleźć na etykiecie produktu po słowach „seria” lub „partia”.
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Dokumenty związane z niedawno zakupionymi produktami zostały zamieszczone w Bibliotece dokumentów.
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Is it possible to use the Aquastar Water Standard Oven outside its specified temperature range of 150 °C to 400 °C? Namely, could it be used at 120 °C, and if so, what procedures, adjustments, or validations would be required to ensure proper perfo
1 answer-
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How can I determine the shelf life / expiration / retest date of this product?
1 answer-
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.pdfHelpful?
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How is shipping temperature determined? And how is it related to the product storage temperature?
1 answer-
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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What should be done if Water Standard Oven 1% experiences a decrease in water content when stored under argon in a glove box?
1 answer-
It is not recommended to store the 1% water standard oven in a glove box. Storing it in environments with low humidity can cause a decrease in its water content. To maintain the standard's integrity, it is crucial to tightly seal the bottles immediately after use and store them under normal laboratory or environmental conditions.
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buenos dias, a que temperatura esta certificado este std ?
1 answer-
As cited in the product Certificate of Analysis, the water content is determined by the coulometric Karl Fischer oven method at 170°C".
TS Answer: Product 1.88054 (which may also be written without the dot as 188054) is a water standard composed of a mixture of potassium sulfate and sodium tungsten dihydrate, provided as a powder. It is approximately 1 percent water by weight or 10 milligrams of water per 1 gram of powder; the exact certified value as a mass fraction or mass percentage is reported on the certificate of analysis (CofA) for each lot.
This standard is to be stored at room temperature (15-25°C), up to the lot-specific expiry date. But the analysis is run at a much higher temperature. The Measurement method provided on the Certificate of Analysis says "The water content is determined by coulometric Karl Fischer oven method at 170°C".
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