1 / 18

The “BS & W Portable coulometric Karl Fischer titrator

The “BS & W Portable coulometric Karl Fischer titrator. KF Titration Cell Differences. VOLUMETRIC. COULOMETRIC. Burette. Detector. Generator. Detector. Why Have Two Different KF Methods?. Volumetric KF usually used for: High water content > 10%. Coulometric KF better suited for:

callum-shelton
Download Presentation

The “BS & W Portable coulometric Karl Fischer titrator

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. The “BS & W Portablecoulometric Karl Fischer titrator

  2. KF Titration Cell Differences VOLUMETRIC COULOMETRIC Burette Detector Generator Detector

  3. Why Have Two Different KF Methods? • Volumetric KF usually used for: High water content > 10%. • Coulometric KF better suited for: Low water content 1ppm – 10%.

  4. Advantages of Coulometric KF • Fast analysis: most analysed in < 1min • Low reagent usage: multiple samples can be analysed with a single charge of reagent which means less waste and less handling of chemicals, good news for Health and Safety • Simple operation: no need for a chemist • No reagent calibration

  5. Analysis of Petroleum Products • ASTM D1533, D4928, D6304, IP 386 and API MPMS chapter 10.9, stipulate that: Karl Fischer anode reagent should be mixed 60:40 with xylene • Intended to improve sample miscibility and limit problems with the generator electrode due to waxy deposits and asphaltines dropping out of the sample

  6. Problems with Petroleum Products • Modification of the reagent and addition of oil samples affects the resistance and capacitance of the titration cell

  7. Why Is This a Problem? • Coulometers work on fundamental law 10.71 coulombs will titrate 1mg of water • When the resistance in the electrolysis cell is increased the coulometer cannot operate correctly and gives incorrect results, usually high.

  8. What Is This Problem? • Everycoulometer has a maximum titration current and count rate • If the resistance in the cell is high it cannot generate required current • But it continues to count as if the required current was being generated THIS PRODUCES AN INCORRECT RESULT

  9. What Happens at Present? • The method states that the performance of a coulometer should be monitored after every 10 samples by injecting water standard • What if result is incorrect? • Do you assume that all the previous results are correct? • Can you afford to make that assumption?

  10. A.C.E. Control Automatically Compensated Errors • Guarantees that the electrolysis current produced and the count rate displayed are always correctly synchronized, regardless of changes to the electrolysis cell resistance • At the heart of the BS & W Portable titrator

  11. Advantages of ACE control • Reduction in reagent consumption • More cost effective • Better conditions for personnel • Most importantly - The ACE control system GUARANTEES THE CORRECT RESULT

  12. BS & W Portable Offers more flexibility

  13. Why Do I Need BS & W Portable? • Increased flexibility • Can analyse a wider range of samples • Allows selection of different • Volumes • Densities • Weights • Result formats • Delay times

  14. Target Applications • Crude oils • Petroleum products • Lube oils • Brake fluids • Hydraulic fluids

  15. BS & W -Truly Portable • Carry case • Built in printer • Built in battery • Car adapter • Moisture tight low drift cell • All standard

  16. Low Drift Cell (LDC) • Specifically designed for outdoor use • Unique dual lock system • Ground glass joint • Tight seal screw caps • Anti stick joints (no grease required)

  17. Cou-Lo Formula Reagents • Single shot bottles • Safer to use • Safer to store • Low cost • Faster precondition • Reduced downtime • Improved sample miscibility / solubility • For all coulometers

More Related