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PREP 9100
Fraction collector for GC

Micro-preparative technique refers to the collection of factions after separation by Gas Chromatography to enhanced the concentration. The enrichment procedure is based on a repetitive adsorption of eluting compounds, after separation from a capillary column, by sucking them through an adsorption tube mounted on the outlet splitter. Optimization is easily performed during a supervised GC run in a semi automatic mode. Once optimized, repetitive injection/collections are performed using an autosampler. Full synchronization makes the system fully automated. The system directs the column effluent at any given time into the collecting system where the compounds of interest are adsorbed.

Features

PREP 9100  
Fraction collector for GC

  • It helps customers to collect unknown odor samples
  • The collected pure sample can be directly dissolved for further structural analysis
  • It is an essential tool for flavor chemical research and formula research

Working principle

The target peaks were collected in different adsorption tubes based on retention times. The repeatedly enriched flavors or odorants can be dissolved and then used for structural measurements such as NMR. It provides important structural information for the analysis of flavor chemistry and the next step in synthesis.

Workflow

The output of the column is split between the FID and the prep.The flow to the prep is stopped by an on/off valve. A vacuum pump is on the other side of the valve. When collecting the valve is opened, sucking the eluent from the column through the traps. At the end of the collection the valve is closed The carousel is advanced to the next tube.

Specifications

  • Available in 2 length: 80cm & 140cm
  • Connection on the left, right or top depending on GC confguration
  • Transfer line heated up to 325°C
  • Up to 10 collection tubes
  • Tube changing time: less than 2 seconds
  • Adsorbent available: Tenax, Porapack Q, Charcoal
  • Custom adsorption /empty tubes available upon request
  • Tube capacity: 1 to 4mg
  • Optional heated cone for collection of heavier compounds
  • Synchronization with GC and Autosampler via TTL, Contact closure, current sink.
  • Manual advance of carousel possible
  • Can be upgraded to the Sniffer9100 for GC-Olfactometry

Other options

Sniffer9100
GC-Olfactometry

Applications

Food, spices, flavors, petrochemicals, environmental protection, drug analysis, etc.