louboutin replica

Q: How do I store Molecular Weight Standards? 


A: Storage of Polymer Standards

Store your standards in a dark cool area in a refrigerator (4oC) tightly recapped. This keeps excessive moisture away and increases the standard shelf life. This is especially important for low molecular weight standards.

WARNING: NEVER store standards under direct sunlight (windowsill or shelf near windows), to prevent sample degradation over time.  This warning is critical to polyisoprene, polybutadiene, and other temperature and/or light sensitive polymers.  Usea dark container and refrigerator. The PSS kit box with the packaging foam in place will suffice.

Water-soluble polymers require cool and dry storage conditions in properly sealed vessels.  The variability of moisture content depends on several parameters (e.g. surface, molecular weight, sample preparation, storage conditions, etc.). Moisture content should be determined before starting any measurements that would relate to polymer mass.

Do Not store organic or aqueous standards after they are in solution. Aqueous standards are susceptible to degradation upon solubilization.  

WARNING
: NEVER  freeze standards in solution; freezing can break chains down resulting in lower molecular weights.

 

Shopping Cart

The cart is empty
If form does not appear below clickhere
HTML Forms powered by Wufoo

Latest News

  • GPC Training Course June 4th – 5th 2019 +

    GPC Training CourseJune 4th – 5th 2019 PSS USA will be hosting their GPC training course again. It provides lectures on Read More
  • Presentation at ACS Spring 2019 National Meeting & Expo +

    ACS Spring 2019 National Meeting in Orlando, FL, March 31 – April 4, 2019.  Determination of the Chemical Heterogeneity of Ternary Read More
  • New PSS e-book Series +

    Part 1: GPC/SEC Theory and Background Contact us to receive a free copy of PSS e-book Series part 1: GPC/SEC Read More
  • PSS Webcasts (on-demand) +

    PSS Webcasts (on-demand) Duration: 60 minutes, Q&A session included GPC/SEC/GFC Basics This webinar is designed for beginners and scientists who Read More
  • Introducing our new Online Store +

    We are pleased to announce that we will be launching our NEW and IMPROVED PSS online store on November 2nd . You Read More
  • 1

catalogleft