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Dynamic HeadSpace

DHS

Specifications

Uses

The GERSTEL DHS efficiently extracts and concentrates VOCs from liquid or solid samples placed in standard Headspace vials prior to GC or GC/MS analysis. The DHS module provides thermostating and agitation as well as purging of the sample headspace onto a replaceable sorbent tube with a controlled flow of inert gas.

System Configuration• CompatiblewithmoststandardGCs

• AutomatedoperationbasedontheGERSTELMulti­Purpose Sampler MPS

• GERSTELThermalDesorptionUnitTDUisusedforthermal desorption of analytes

• GERSTELCooledInjectionSystemCISisusedforanalyte focusing prior to GC or GC/MS analysis

Sample Volume• Max.10mL,in20mLheadspacevials

Adsorbent Tubes• StandardGERSTELTDUtubes

• Individualtubescanbefreelyselectedforeachsample

• DetailedinformationonTDUtubesandadsorbentma­terials is available in a separate flyer

Analyte Transfer• HeatedneedlesystembetweentheHeadspacevialand

TDUtube,similartostandardheadspacetechnique

• Notransferlineinsystem

Cooling Option• PeltierCoolingUPC

Incubation Temperature• 30…200°Cdependingontheambienttemperature

• 10…200°CwithUniversalPeltierCoolingUPC

Trap Temperature• 20…70°C

Transfer Temperature• Max.150°C

Agitation Speed• 250…1500rpm

Gases• He

• N2

• Syntheticair

Gas Purge Volume• Max.100liters

Gas Flow• 5…100mL/min

• Controlledbyamassflowcontroller

Tech

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DynamicHeadSpace DHS

Control• BasedonControllerC506

• IncombinationwiththeGERSTELMAESTROsoftware,alternativelyintegratedinanAgilent® Technologies chromatographydatasystem,orcoupledtoachroma­tography data system from Thermo Scientific®,oroper­atedinstand­alonemode

• Onlyonemethodandonesequencetablerequiredforthe complete system including GC/MS when integrated in the ChemStation or MassHunter software

Dimensions (H × W × D)• 27.5×7.5×27.5cm

Weight• 2.6kg

Operating Conditions• 20…35°C

• Relativehumiditymax.50­60%,non­condensing

• Max.4615mabovesealevel

Storage Conditions• 5…40°C

• Relativehumiditymax.50­60%,non­condensing

• Max.4615mabovesealevel

DHS Large Option

The DHS Large Option enables the determination of volatile analytes from a large solid sample in a vessel with avolumeofupto1liter.ItiseasilyretrofittedtoaDHSmodule.

Features• Especiallysuitableforlarge­volume,solidsamples

• Maximumsamplecontainervolumeof1liter

• Maximumsampleweightof2kg

• DHSFlowLogoptionatgasoutletforleakcheckingand logging

• EasyswitchingbetweenDHSandDHSLargeoperation

• Software­controlledlockingmechanismlocksthecar­riage in the appropriate position

• Manualsampleexchange

• Temperaturerange:AT…200°C

• NoupgradetoDHSLargeAutosamplerpossible

Sample Vessel with Cover• Vesselvolumesof1L,500mLand250mL

• Innerdiameterof9.9cm

• Maximumfillingheight: 11.7cm(1Lvessel), 5cm(500mLvessel), 1.7cm(250mLvessel)

• Producedfromstainlesssteel,deactivated

• Viton® sealing ring

• Safetyvalvelimitstheinnerpressureto2.3bar

Power Consumption• 300Watt

Power Supply• 100…230VAC,50/60Hz