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Merck
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主要文件

1.19533

Supelco

氰(CN)离子标准液

traceable to SRM from NIST K₂[Zn(CN)₄] in H₂O 1000 mg/l CN Certipur®

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About This Item

UNSPSC代码:
41116107
NACRES:
NA.24
价格与库存信息目前不能提供

质量水平

100

技术

ion chromatography: suitable

pH值（酸碱度）

9-10 (20 °C in H2O)

密度

1.00 g/cm3 at 20 °C

应用

environmental
food and beverages

包装形式

single component solution

储存温度

2-8°C

相关类别

分析说明

浓度     β (CN⁻)：990 - 1010 mg/l
测定方法：银量滴定法。
该溶液的含量是用硝酸银标准溶液（货号1.09081）测定的，该标准溶液是用容量标准氯化钠（货号1.02406）标定的。扩展测量不确定度为± 0.7 %（k=2，覆盖因子为95%覆盖率）。认证值可通过体积标准氯化钠追溯至一级标准品NIST SRM 999b（NIST：美国国家标准技术研究院）。该过程由德国Darmstadt Merck KGaA公司认可的校准实验室根据DINDIN EN/ISO 17025进行测定。

法律信息

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

危险声明

H412

预防措施声明

P273 - P501

危险分类

Aquatic Chronic 3

补充剂危害

EUH032

储存分类代码

12 - Non Combustible Liquids

WGK

WGK 2

分析证书(COA)

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Questions

1–2 of 2 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

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