November 2008 | Volume 5 | Issue 4

FEATURE ARTICLE:

The NEW Oasis® HLB Disk Creates Greater Efficiencies for the Environmental Laboratory

Horizon Technology has teamed up with Waters Corporation to develop the Oasis HLB Disk, a solid-phase sample preparation product for the analysis of EPA Method 8270 and 1694, endocrine disruptors, personal care products, pharmaceutical residues in surface water and drinking water, and other emerging contaminants.

Built on the Atlantic™ Disk platform, Oasis HLB Disks are widely used by environmental laboratories analyzing samples with gas and liquid chromatography and mass spectrometry in compliance with approved methods of analysis. Designed for use with the Horizon Technology SPE-DEX® 4790 Automated Extractor System, environmental scientists can experience a number of benefits including:

• Water-wettability — will not dry out even if air drawn through
• High retention — effective with a broad range of analytes
• Speed — increased throughput
• Large sample volume — ideal for environmental samples
• Reduced solvent consumption — compared to LLE
• Increased capacity for dirty samples — compared to other SPE formats
• Excellent recoveries — comparable or better than LLE

>> Request a FREE Oasis HLB Sample Pack today

>> Download Application Note
    - Determination of Semi-Volatile Organic Compounds in Water
      Using the Oasis HLB SPE Disk for EPA Method 8270D

DID YOU KNOW: TECH TIP

Extend the Life of Your SPE-DEX 4790 Automated Extractor System

Correct shutdown of your Horizon extractor after each day is the best way to prevent a breakdown and extend the life of your equipment. One of the most important shutdown procedures for your extractor is cleaning of the water, solvent and sample pathways with hot water. In most cases, the water sample that flows through t he extractor's plumbing is laden with a large amount of particulates that can lead to valve failure and clogging.

Additionally, it is recommended that once a week the extractor's pathways are cleaned with acetone, followed by a flush of hot water. Other important shutdown procedures include:

• Remove the plug from the 5-gallon waste and allow the
  vacuum to vent for 5 minutes.
• Turn off the nitrogen supply and release the gas pressure
  from the solvent bottles.
• Remove the disk holders, sample bottles, collection vessels
  and adapters from the extractor.

To view the detailed Startup and Shutdown procedures for the extractors, click here.

If you have any questions about this or previous "Did You Know" topics please contact support-service@horizontechinc.com