Measurement of the electrical conductivity of an aqueous solution is a quick, easy, and practical way to gain information about that solution. Whether monitoring natural water for its total dissolved solids (TDS) or measuring a sophisticated pharmaceutical preparation, conductivity measurement is a widely used technique. A general discussion of the technology may be found in Standard Methods for the Examination of Water and Wastewater and other places.
Biopharm has manufactured conductivity standards since 1977. Our experience has led to many improvements in our products and production techniques during this time. We now have a dedicated conductivity lab where all of our standards are made in a rigidly controlled environment. Written standard operating procedures (SOPs) are used to calibrate our conductivity instrumentation using NIST standard reference materials. We use instruments and contact type dip cells manufactured by Yellow Springs Instrument Co., Inc. Temperature measurements and calibrations are traceable to NIST by way of ERTCO ASTM 63C-FC thermometers (0.1 degree graduations), and our balances are calibrated to NVLAP standards.
Our finished conductivity standards are filtered through a 0.2 micron filter to minimize bioburden. Each final container/bottle is rinsed with product at the time of fill. Bottles used to package standards of less than 20 μMho/cm undergo a "leaching" process to improve shelf life. A conservative Expiration Date is given to each lot based upon documented shelf-life studies.
Biopharm Inc. manufactures a wide range of conductivity values so that you can calibrate your equipment near the
value(s) at which you operate. We probably have a standard value close to your needs; if not, we will make exactly the value you need. Call us today with your requirements!
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