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
1.88054
Water Standard
1%, Certified Reference Material for KF oven method Aquastar®
Sinônimo(s):
Forno padrão de água 1% para método de forno KF TM=["AQUASTAR"]
About This Item
Produtos recomendados
Nome do produto
Padrão de água para estufa 1%, Certified Reference Material for KF oven method Aquastar®
grau
certified reference material
Nível de qualidade
Agency
ISO 17025, 17034
linha de produto
Aquastar®
Formulário
solid
técnica(s)
Karl-Fischer titration: suitable
titration: suitable
densidade volumétrica
460 kg/m3
Formato
neat
temperatura de armazenamento
15-25°C
Descrição geral
Faça o download de seu certificado em http://www.sigma-aldrich.com para visualizar os valores certificados, incluindo a incerteza e a data de validade.
Aplicação
Características e benefícios
- Embalado em frascos de vidro convenientes com o material submetido a estudos de estabilidade e homogeneidade de acordo com a ISO 17034 e ISO guia 35
- Fornecido com um certificado de análise (CoA) específico do lote com dados sobre quantidade medida de água exata, incerteza, método de análise, método de medição e validade mínima
- Caracterizado em um laboratório de calibração com certificação ISO/IEC 17025 e ISO 17034
- Atribuível diretamente ao sistema internacional de unidades (kg)
Ligação
Informações legais
reagente
Código de classe de armazenamento
13 - Non Combustible Solids
Classe de risco de água (WGK)
WGK 2
Ponto de fulgor (°F)
Not applicable
Ponto de fulgor (°C)
Not applicable
Certificados de análise (COA)
Busque Certificados de análise (COA) digitando o Número do Lote do produto. Os números de lote e remessa podem ser encontrados no rótulo de um produto após a palavra “Lot” ou “Batch”.
Já possui este produto?
Encontre a documentação dos produtos que você adquiriu recentemente na biblioteca de documentos.
Os clientes também visualizaram
Artigos
New Aquastar® Karl Fischer Anolyte for precise and reproducible determination of low water content in the range of 10 ppm to 10000 ppm for cells without a diaphragm.
Methods including internal extraction, external extraction, and Karl Fischer oven ensure accurate water content determination by titration.
Protocolos
Karl Fischer titration offers accurate water content determination in hemp samples compared to the loss on drying method.
Foodstuffs often provide a challenge for the water determination by Karl-Fischer. Instant Coffee is such a sample matrix and its water content has influence on quality and shelf life.
-
How can I determine the shelf life / expiration / retest date of this product?
1 answer-
Helpful?
-
-
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
Helpful?
-
-
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.
Helpful?
-
-
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".
Helpful?
-
Active Filters
Nossa equipe de cientistas tem experiência em todas as áreas de pesquisa, incluindo Life Sciences, ciência de materiais, síntese química, cromatografia, química analítica e muitas outras.
Entre em contato com a assistência técnica
