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1.19813

Supelco

硫酸根(SO4)离子标准液

traceable to SRM from NIST Na₂SO₄ in H₂O 1000 mg/l SO₄ Certipur®

别名:

即用型水性基质的硫酸盐标准品

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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

密度

0.998 g/cm3 at 20 °C

应用

environmental
food and beverages

包装形式

single component solution

储存温度

15-25°C

分析说明

浓度     β (SO₄²⁻)：990 - 1010 mg/l
测定方法：用高氯酸铅（II）溶液滴定。
（可追溯至NIST-SRM 682）
方法的准确度： ± 2 mg/l

法律信息

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

储存分类代码

12 - Non Combustible Liquids

WGK

nwg

分析证书(COA)

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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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