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Unit of Measurement for Electrical Conductivity

The unit of measurement for electrical conductivity is commonly used as one millionth of a Siemens per centimeter (micro-siemens per centimeter or µS/cm). When measuring more concentrated solutions, the units are expressed as milli-siemens/cm (mS/cm). For ease of expression, 1000 µS/cm are equal to 1 mS/cm.

Are you interested in learning more about the membrane filters you use in the lab every day?

Tune in to Sterlitech’s upcoming webinar on April 9th at 8:00 am PT. This webinar will provide an introductory overview of microfiltration membranes.

Join our filtration experts as they discuss characteristics and applications for membrane filters and answer any questions you may have.

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You'll walk away knowing:

• What microfiltration membranes are and how they work
• How to decide which membrane filter is right for your application
• Where to find additional resources

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Please register here to attend.

Sterlitech will be in Philadelphia, Pennsylvania exhibiting our filtration products at Pittcon 2019 . This year, the annual global expo for analytical lab sciences is being held at the Pennsylvania Convention Center. Pittcon is the world’s leading annual conference and exposition on laboratory science.  

Pittcon attracts attendees from industry, academia and government from over 90 different countries. Pittcon offers a unique opportunity to participate in product demonstrations, attend seminars and short courses, and connect with technical experts. This is Sterlitech’s 17th year participating in Pittcon and we are excited to continue sharing our products with the lab science community. 

 This is a follow up to our newsletter article, “New Adapter for testing 25mm Membrane Discs in the HP4750” that went out in November without going through the necessary steps of internal and external reviews and care for content.  We want to make sure we take the necessary steps to make this right by publishing this follow up.

While Sterlitech has observed a growing need in the research community for a high pressure stirred cell to test 25 mm membrane discs, the development of the first prototype of this product was done by our customers/researchers, Christopher M. Stafford, PhD. and Chris Amigo, Machinist, at the National Institute of Standards and Technology. Christopher and his team shared their design with Sterlitech, so we can make this product available to the other researchers in the field, so a wider audience in the research community can take advantage of their design, and we can all push the boundaries of research and science collectively.

We apologize for the confusion,

The Innovator Cross Flow Filtration Kit is a plug and play system designed for conducting lab scale filtration experiments. With a total hold-up volume <1 liter in the test cell and circulation line, this bench-scale cross flow filtration system is also ideal for filtering valuable feed solutions and or small sample volumes. 

This assembly enables microfiltration, ultrafiltration, and nanofiltration separations using Sterlitech’s Innovator (CF016) or Explorer (CF042) membrane test cells. Our flat sheet membranes are available in pre-cut coupons to fit these cells. The system comes complete with a gear pump, feed carboy, stand-mounted membrane test cell, and all the necessary tubing, pressure control valve, flow and pressure sensors.

Features:

• Pressure control valve to adjust the pressure in the system
• Variable speed knob on pump to adjust feed flow rate
• Cell stand for easier access to membrane and tubing
• Stainless steel or inert thermoplastic construction of wetted parts
• Optional conductivity,

Liposomes are vesicles consisting of an aqueous core inside a hydrophobic membrane bilayer that can be used as a carrier system. They present a promising tool for the delivery of pharmaceutical agents and compounds that typically are unable to diffuse across membrane barriers. Production of liposomes allows for the incorporation of both hydrophobic and hydrophilic compounds into their structure for targeted delivery, enabling use in diagnostics, gene therapy, vaccines, cosmetics, and cancer treatment. In fact, multiple liposomal formulations of cancer therapies have already been introduced on the market.¹ Potential applications extend well past drug delivery – from food production and nutritional supplements to environmental remediation.^2,3

Liposomes can be prepared using extrusion, wherein a lipid suspension is forced through a microporous membrane filter over multiple passes. The membrane pore size and operating conditions determine the liposome sizes created in this process. Track-etched

Join Sterlitech's membrane and process development scientists for a live webinar presentation on our membrane test skids.
We will be discussing how our customizable test skids can enable you to explore new filtration applications in the lab. This webinar will provide an overview of the features and applications of the product line, with a special focus on our multi-functional Convertible Test Skid. We will also have plenty of time for Q&A after the presentation and look forward to answering any questions.

Click here to sign up and learn more about our speakers!

We have observed a growing need in the research community for a high pressure stirred cell to test 25 mm membrane discs. The Membrane Area Reducer was developed in collaboration with Christopher M. Stafford, PhD. and Chris Amigo , Machinist, at the National Institute of Standards and Technology, to add more versatility to our standard HP4750 high pressure stirred cell. Researchers are now able to test 25 or 47 mm discs in the cell with relative ease.

A smaller membrane disc diameter is ideal in the following research applications:

Fabrication of new membranes

Researchers may prefer to test the membranes in a cell with small membrane active area initially. Casting large areas of homogenous membranes at lab-scale production is challenging, whereas testing smaller disks ensure membrane homogeneity across the active area.

Membrane surface modifications

Researchers who modify the membrane surface using plasma, UV radiation, vapor deposition, or one of the many other techniques with lab-size