Agilent is offering the 7693A automated liquid sampler (ALS) for all current Agilent benchtop gas chromatography (GC) models.
The ALS - which is claimed to offer substantial gains in throughput, flexibility, sample preparation automation and serviceability - is modular, letting users configure the exact auto-sampler that they need, starting from a basic injector with a 16-sample turret and later adding capabilities as needs expand.
Options include a second injection tower, a 150-vial sample tray and a vial heater/mixer/barcode reader for long unattended operation.
Injection time of less than 100ms minimises sample degradation and the effects of needle discrimination.
The two-injector configuration doubles sample throughput.
Agilent offers an optional heater/mixer/barcode reader module that can automate a number of pre-injection procedures.
This offers substantial savings in time and labour and operator-to-operator variability is eliminated.
Solvent consumption and waste expense can be trimmed by as much as 90 per cent.
Agilent has also introduced the Multimode GC inlet with split, splitless and programmable temperature vaporisation (PTV) capability, costing approximately USD2,500 (GBP1,800) less than the previous version and featuring much lower maintenance requirements.
The temperature programming capability facilitates a range of injection volumes, analysis of thermally unstable samples and better productivity through fewer sample-preparation steps.
The inlet incorporates Agilent's Turn-Top feature, which allows liners to be changed in seconds without special tools or training.
PTV has the ability to inject high matrix samples with little or no clean-up into a GC or GC/MS.
Productivity is enhanced and maintenance is further reduced when this is combined with the back-flush function, which is available with the Agilent 7890A GC and 5975C GC/MS.
'Dirty' samples can be injected into the GC or the GC/MS.
When the compounds of interest have reached the detector, gas flow is reversed in the pre-column, where the high boiling compounds are flushed out of it and the inlet before they reach the analytical column.
The results are claimed to be a longer column life and reduced maintenance requirements.
The inlet shares common liners, septa, ferrules, nuts and o-rings with the standard inlet, eliminating the need to stock special parts.
