Gaskromatografi


Från ATAS GL, en kromatografi specialist, kan man finna tillbehör och
automatiska system för provinjektion, se nedan Optic 3 , Linex etc.

Gasdetektor "Leakdetector LD229" kan du också hitta hos oss.

OPTIC 3 Injection System

OPTIC3.pdf

Increase capacity of your GC system with OPTIC 3 injector!

OPTIC 3 is a highly advanced injector with sophisticated temperature and gas flow control that
can be used for the most demanding GC analyses. As its predecessor, OPTIC 2, the new system
can be used for hot split/splitless, cold split/splitless and on-column injections. Facilities such as
large volume sampling, thermal desorption and pyrolysis are standard features.

OPTIC 3 is designed to be compatible with most popular makes and models of GC and GC-MS.
Once installed, OPTIC 3 should be fully compatible with an autosampler.

OPTIC 3 system consists of the injector, the control unit and the dedicated control software -
ATAS Evolution Workstation. The software graphically displays all the system parameters in a
real time mode and gives a possibility to save the run-time data for every injection. Evolution Workstation
can also be integrated with Agilent Chemstation.

OPTIC 3 can be delivered in one of the four configurations. The basic model is OPTIC 3-S.
OPTIC 3-D has an auxiliary gas control channel. OPTIC 3-SC and OPTIC 3-DC include a built-in
cryotrap option

LINEX

Second generation DTD

New accessory for OPTIC 3 injector

Automatically changing liners is a technique that has already been used for many years.
ATAS GL has successfully applied this approach in the Direct Thermal Desorbtion (DTD) unit.
Now we introduce its second generation: LINer EXchanger.

Advantages are:

- Can be used on any GC,
- DMI technique permits the analysis of trace contaminants in a wide range of
different matrices,
- Uses standard 11mm septa and is compatible with the Merlin Microseal,
- True septum purge (removes septum bleeding, reduced risk of carry over)
- Liquid injection can be done while the automatic head is closed,
- Uses standard OPTIC liners,
- No liner transport adapter required,
- Based on the OPTIC 3
- Little if any sample preparation is required,
- Can be automated by FOCUS / CombiPAL,
- Selective desorption of components of interest without pyrolyzing of the matrix,
- Low consumable costs,

What is DMI:

• Ability to analyse sample by directly introducing the matrix or extract into the
injector – little if any sample prep is involved
• Liquid or dirty solid samples contained in a DMI microvial which is inserted in
an injector liner
• Desorption from sample directly onto head of the GC capillary column – fewer
steps involved, less opportunities for analyte losses
• Solvents can be removed by venting under controlled conditions
• Compounds of interest can be transferred onto the column using the lowest
possible final temperature – limits pyrolyzing of matrix
• Involatiles from the matrix are kept in the microvial which is disposed of after
use – iner can be re-used

LINEX, an automated liner exchanger, is designed to be used for Direct (in-injector)
Thermal Desorbtion (DTD). It can be quickly, in a matter of minutes, mounted on any
standard OPTIC injector. Any of the standard OPTIC liners can be handled by LINEX
either in manual or automated mode. In the automated mode liners are transported
between the 98-position tray and injector by ATAS GL FOCUS sampling robot equipped
with a pneumatic gripping arm.

With LINEX, the multi-sample analysis sequence works in a simple way: head of the
injector is opened and a liner containing sample is introduced. The head is closed and
the liner is purged with carrier gas. Next, the injector is heated and the sample is
transferred onto the column. At the end of the analysis the empty liner is moved back to
the tray and the cycle is repeated.

The use of the newly developed LINEX is a most promising approach for analysis of solid
and enriched gaseous samples with the fully automated OPTIC GC or OPTIC GC/MS
system. There is also a possibility to apply the approach for the analysis of samples with
a difficult matrixusing the so-called DMI technique. With DMI a minimum sample
preparation is required.

Applications done on LINEX:

• Qualitative and quantitative determination of the organic wood preservative
component N-cyclohexyl-diazeniumdioxide (HDO) in treated timber means of  direct thermal desorption–gas chromatography–mass spectrometry
(DTD–GC–MS).
• Trace-level determination of pesticides in food using difficult matrix introduction.
• Fatty Acid Profile in vegetable oils.
• Analysis of car exhaust.
• Nicotine in Tobacco.
• Chemical Analysis of Spores and Pollen.
• Limonene in shampoo.
• Benzene and toluene in crude oil.
• Caffeine in instant coffee.

FOCUS - Robotic Sample Processor
Best for automatic preparation of samples for GC analysis!

FOCUS is compatible with most GC and GC-MS systems and can automate the following:

• Direct Thermal Desorbtion (DTD)
• SPME Automatic liquid-liquid extraction
• On-line sample derivatisation Large and standard auto injection volumes
• Program for different sampling protocols Static Headspace

FOCUS Specification
Specification in Liquid Mode

Specifications in SPME Mode

SPME fiber holder for standard SPMEfibers Variable vial penetration depth for headspace or liquid extractions Samples can be agitated and / or heated during extraction
Sample capacity:	up to 297 2-ml standard vials up to 96 10-ml or 20-ml vials optional Cooled Trayholders available
Fiber cleaning:	Optional Fiber cleaning station 25°C – 350°C, inert gas purging. Download brochurehere.
Incubator oven:	6 heated vial positions for 2-ml/10-ml/20-ml vials
Incubation temperature:	25°C – 200°C selectable 1°C increments
Agitation:	Interval shaking 100 rpm – 750 rpm prior or during sample extraction

Steps of  FOCUS SPME Cycle

Specifications in Headspace Mode