Agilent 7697A Headspace Sampler

Data Sheet

Overview

The Agilent 7697A Headspace Sampler

is part of Agilent’s line of gas chro-

matography products. The 7697A –

based on the architecture of the mar-

ket-leading 7890 GC and 7693A ALS

line of products – has been designed to

exceed the expectations of the most

demanding laboratories.

Models

• Agilent 7697A Headspace Sampler -

12 vials with single position oven for

sequential sample heating

• Agilent 7697A Headspace Sampler

with Tray – 111 vials with 12 posi-

tion oven for optimized sample

overlapping

Chromatographic

Performance*

Typical area repeatability

• 7697A <1.5% RSD

• 7697A with tray <1% RSD

Sample Handling

Agilent 7697A

• 12-vial capacity

• Single position, solid aluminum vial

oven

Agilent 7697A with Tray

• 111 vial total capacity

– 108 vials in three removable

36 vial racks suitable for in-rack

vial capping (racks are resistant

to common solvents used in

gas chromatography)

– Three vials in priority sample

positions

– Racks exchangeable during

sequence for continuous

operation

• Available 108 vial cooling plate

• Twelve position air-bath vial oven for

precise temperature control of every

sample throughout its equilibration

time

• Adaptive algorithmic sample

overlapping to maximize throughput

*Using 7697A, 7890 GC with EPC (split), and Agilent Data

system for analysis of ethanol. Results may vary with

other samples and conditions. Conditions and

parameters are listed on page 5.

• Vial shaker with frequency and accel-

eration adjustable parameters

provides faster sample equilibration

• Integrated bar code reader available

• Available vial cooling plate (5 °C to

ambient range, depending on envi-

ronmental conditions, as described

in Table 4) with temperature sensor

allows critical samples to remain

cold until the time of analysis

(requires recirculating chiller)

Sampling Method

• Robust valve and loop headspace

sampling system with standard full

electronic pneumatics provides

complete control of the sampling

process (allows independent vial

pressurization and GC column head

pressures)

• Unrestricted GC column selection

from 50 to 530 µm regardless of

sampling conditions

• Chemically inert sample flow path

• Fully automated purging of sample

and vent paths between each

analysis

Agilent 7697A Agilent 7697A with tray

Oven Off, 35 °C to 210 °C Off, Ambient +5 °C to 300 °C

Valve and Loop Off, 35 °C to 210 °C Off, Ambient +5 °C to 300 °C

Transfer Line Off, 35 °C to 250 °C Off, Ambient +5 °C to 300 °C

Sample Vials

• Adaptor-free compatibility with

headspace vials of 10 mL, 20 mL,

and 22 mL sizes that meet the

following specifications:

– Screw or crimp top closure

– Flat or rounded bottom style

– Dimensions:

- 10 mL size (47.0 mm

minimum height with closure)

- 20 mL and 22 mL sizes

(79.0 mm maximum height

with closure)

- All sizes (22.40 to 23.10 mm

width)

• Unrestricted use of different vial

sizes within a single sequence

Modes of Operation

• Single Extraction mode with overlap-

ping of up to 12 vials for maximized

sample throughput while maintain-

ing constant heating time for each

vial.

• Multiple Headspace Extraction

(MHE) mode with up to 100 extrac-

tions per vial.

• Multiple Headspace Concentration

(MHC) mode with up to 100 extrac-

tions from a single vial followed by

one GC start to maximize sensitivity.

• Method Development mode used to

optimize headspace extraction by

incrementing one of the following

parameters: equilibration time, oven

temperature, or vial shaking.

System Control

• Standalone Operation

– Control and monitoring by full

function chemical resistant key

pad

– Multiline display with English

and Chinese language settings

– LED indicators for Not Ready,

Run, Sleep, Service Due, and

Tray Park

– Setpoints and actual monitoring

for all parameters

– Store up to 32 user-defined

headspace methods (plus five

preset methods)

– Store up to 9 user-defined

sequences

• Control software interfaced via LAN

connection and available for inte-

grated control via Agilent GC and

MSD data systems (OpenLab CDS

ChemStation, OpenLab CDS

EZChrom, GC ChemStation, and MSD

ChemStation).

– Headspace parameters are

controlled via configuration and

method dialogs

– System actuals are displayed in

conjunction with GC and

GC/MS status

– Headspace sequence status

window displays individual

sample information in graphical

and detailed layouts

– Event logging captures each

headspace action and makes

data available for reporting

• Enhanced control of instrument

scheduling parameters

– Tray diagrams for graphical dis-

play of sample status (available

in select data systems)

– “Wizards” for headspace

method generation from:

- Existing methods of either

valve and loop or pressure

transfer headspace sampling

techniques

- Sample specific information

(solvent, boiling point)

Thermal Control

All temperature zones (oven, valve and

loop, transfer line) have setpoint incre-

ments in 1 °C with 0.1 °C resolution for

actual temperatures and can be set to

off (uncontrolled) (Table 1).

Pneumatic Control

• Electronic Pneumatic Control (EPC)

with the following specifications:

– Compensation for barometric

pressure and ambient tempera-

ture changes is standard.

– Pressure setpoints may be

adjusted by increments of

0.001 psi, with typical control

± 0.001 for the range 0.000 to

75.000 psi.

– Flow setpoints may be adjusted

by increments of 0.01 mL/min,

with typical control ± 0.01 for

the range 0.0 to 200 mL/min.

– User may select pressure units

as psi, kPa, or bar.

– Pressure sensors:

- Accuracy: < ± 2% full scale

- Repeatability: < ± 0.05 psi

- Temperature coefficient:

< ± 0.01 psi/°C

- Drift: < ± 0.1 psi/6 months

Table 1. Valid Setpoints