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Arablab 2020

Greyhound Chromatography Arablab  Invitation 2020

Join us on Stand No 466, Hall S1

Make a "DIARY NOTE" and arrange to visit the show ARABLAB+ 2020

  • Paul Massie, Managing Director, Greyhound Chromatography and Allied Chemicals
  • Colin Lambert, Operations Director, Greyhound Chromatography and Allied Chemicals
  • Rachel Phillips MRSC, Sales Manager, Greyhound Chromatography and Allied Chemicals

Once again our colleagues will be attending Arablab 2020, if you would like to arrange an appointment with any of the above please email sue@greyhoundchrom.com to arrange a suitable time.  We will be delighted to see you to discuss new and future business opportunities. 

We are actively seeking Distributors in the following countries: 

Africa; (Eastern, Middle, Northern, Southern, Western), Asia; Kazakhstan, Tajikistan, Turkmenistan, Uzbekistan (Central Asia), Europe and the European Union, Middle East, U.A.E.

Other countries will be considered, please call at Stand 466 to discuss your options. 

If you are not attending Arablab and wish to discuss the opportunties available to you please email sue@greyhoundchrom.com we will put in touch with the right person to speak to. 

 

While attending the Arablab Exhibition you can also

  • Listen to the World's Leading Hi-TEC SCIENCE GURUS @ the ARABLAB SEMINARS
  • Find out who is looking for NEW DISTRIBUTORS @ the ARABLAB DISTRIBUTOR FORUM
  • Discuss with FOOD TECHNOLOGISTS what is happening @ the FOODLABSECTOR
  • Keep informed of the latest in LABORATORY DESIGNS @ the SEFALAB DAY
  • PETROLEUM INDUSTRY personnel can view the latest technology @ the PETROLAB SECTOR
  • Have direct access to ENVIRONMENTAL TECHNOLOGY@ the ENVIROLABSECTOR
  • See latest equipment in the WORLD OF SCIENCE & CHEMICALS @ the CHEMLAB SECTOR
  • Be involved and listen to the specialist presenters @ the THERMOLAB DAYS


Take a look at Arablab's website www.arablab.com which is FULL of NEWS on the show and all the supporting events.

We look forward to seeing you there. 

Contact Us!

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Why is Acetonitrile Used in HPLC?

Acetonitrile together with Methanol are the most commonly used solvents for HPLC and UHPLC Chromatography processes because most substances are easily soluble in both solvents, but not saturated hydrocarbons.  Acetonitrile has a low wavelength which means that the solvent will elute first from the column, therefore pressure is reduced on the column.  Lower pressure in the column will have the long term effect of prolonging the life of the column, pressure within the column varies depending on the solvent used and the mixture ratio between the solvent and the sample.  An Acetonitrile based solution generally has a higher elution strength against the same strength solution using Methanol. Some scientists report that the same retention times can be achieved using acetonitrile with less than half the ratio of methanol.  Operator errors can have a significant impact of reproduceable results.  

 

Acetonitrile produces less pressure than Methanol, however the choice between using Acetonitrile against Methanol should not be made on price, (Acetonitrile is generally more expensive than Methanol), choice should be made on performance for your particular instrument and the effect of the chromatography process on the durability of the column.  High grade Acetonitrile has a lower absorbance in routine HPLC and UHPLC procedures and causes less interference than other solvents that can be used.

Biosolve Solvents in Laboratory Glassware

Biosolve solvents, including Acetonitrile, supplied by Greyhound Chromatography, are filtered at 0.1µm and are packed under inert nitrogen gas for longer shelf life, with very low amounts of inorganic metallic contaminants.  Acetonitrile is bottled in pure glass containers to minimise leaching and degradation of the solvent.  Acetonitrile is a clear colourless liquid with an acidity as low as 0-0.001% depending on the grade.  The presence of acid in the solvent improves the chromatographic peak shape.  Full certificates of analysis are available to view before selecting the right grade of solvent for your application.   Acetonitrile Surpa-gradient grade, available from Biosolve, is the highest-grade Acetonitrile solvent available for HPLC and UHPLC in today's worldwide market. 

                                                                                                   Biosolve HPLC Sovents Brochure                                               Biosolve Logo

 

Acetonitrile is shipped under Dangerous Goods regulations as it is a highly flammable liquid and vapour.  Safety procedures should be closely followed for the safe handling of Acetonitrile, including keeping away from sparks and open flames, hot surfaces and heated storage rooms.  When handling take reasonable precautions to ensure that it does not go on skin or near eyes.  If Acetonitrile does come into contact with clothes, remove the clothing and rinse thoroughly in water.  If it comes into contact with the skin, wash cautiously with water.  If acetonitrile comes into contact with the eyes, remove contact lenses if they are present, rinse with water for several minutes and seek medical advice. 

 

Bioslve Vials Image

Is there a need to wash columns frequently during HPLC

It is important to look after your columns to prolong their life and also their integrity.  Washing a column is an important process that should be done regularly.  Depending on how many samples you are processing and how often you are using them will determine how many times you wash the column.  Storage of the cleaned columns should also be considered.  It is important to establish a wash cycle in the laboratory, if you do not you will notice a gradual pressure build up and you may experience ghost peaks after the first injection.   Ghost peaks are caused by compounds eluting off the column in later runs despite being injected in a previous analysis. 

This is the recommendation for a column that is to be stored over a long period.  Replace buffers and modifiers at the end of the day, it is recommended that you wash the column with 70% water, 15% methanol and 15% acetonitrile.  divert the eluent from the column to waste so as not to contaminate the detectors.  Wash the column in 100% methanol and 100% acetonitrile, both for at least 15 minutes.  Store the column subject to the manufacturers recommendations, this will preserve the column, which may last for years depending on the number of samples processed and the care you give to your column.   For daily use, wash the column in 70% water, without using an acid or modifier, and store overnight subject to manufacturer's instructions. 

 

Bioslve Vials Image

 

Historic World Shortage of Acetonitrile

In 2008 there was a world shortage of Acetonitrile, (a by-product from the manufacture of acrylonitrile) because of several factors, including, Chinese manufacture being shut down because China was hosting the Olympics and all industry within China was either closed down or drastically reduced in an attempt to improve the standard of air during the Olympics.  Also, during Hurricane Ike in the USA an Acetonitrile factory was damaged in Texas causing further shortages.  As Methanol is an acceptable substitute in most HPLC methods the shortage can be overcome.  Acetonitrile is seen as a valuable commodity due to the volume used worldwide for a variety of purposes other than Laboratory analysis.  There is no anticipated shortage of acetonitrile at this present time.  

 

Author:

Susan Massie, Marketing Director

Greyhound Chromatography and Allied Chemicals

www.greyhoundchrom.com

 

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