Mass Spectrometry Instruments providing high performance instrumentation for the analytical world

AUTOCONCEPT

GD90

SPECIFICITY

SEN

SITIV

ITY

RESOLUTI

ON

SELECTIVITYAUTOCONCEPT

AUTOCONCEPTWorld c lass mass spectrometry provid ing h igh performance for themost exact ing analyses

The Benefits of High Performance

The high performance capability of Autoconcept

provides the user with distinct advantages- high

sensitivity, resolution, selectivity and specificity. Take

mass measurement for example. It is easy to

measure a mass peak at low resolution - in theory the

mean point of the ion distribution provides an

accurate result. However, problems invariably occur

when interfering ions at the same nominal mass

distort that mean point. That’s where the resolving

power of Autoconcept can exclude those

interferences resulting in an accurate mass in which

you can have confidence. Similarly, when monitoring

elemental contaminants, the resolution of Autoconcept

can tune out interferences and, by increasing

selectivity and specificity, result in overall higher

sensitivity with absolute confidence in the results.

Specificity:

High performance provides superior identificationand confirmation capabilities. The above traceshows Pb impurities in Cu by confirming isotopicpatterns of the elements.

Sensitivity:

Large dynamic range is obtained usingboth a Faraday cup and an electronmultiplier. The electron multiplier can beused in both analogue and ion countingmodes. Single ion detection allows subppt level detection limits.

Resolution:

Autoconcept ion optics aredesigned to provide greaterthan or equal to 80,000resolution using the 10% valleydefinition. For inorganicanalysis, 10,000 resolution isachieved routinely.

Selectivity:

The GD90 has the ability to use highperformance MS characteristics todetermine a selected ion in a matrix withtypical interferences. In this example, 28Siis detected in an Al matrix.

203.973: 1.4%

205.9745: 24.1%

207.9766 52.4%

Samples:

Solid metal samples in both flatand pin form can be analysed.Using RF, insulators can also beanalysed.

Excellent Transmission

Loss of intensity is minimal when changing from a

resolution of 1000 with open collector slit to a

resolution over 4000. A typical transmission of at least

90% results in better sensitivity and detection limits.

When Less Gives More

Autoconcept’s ion optics involve high precision

engineering yet the design has produced a very

simple layout with very few focusing lenses. All mass

spectrometers use focusing lenses to ensure that the

ion beam remains in the correct orientation. As all

lenses have an element of interaction with each other

then it is clear that the fewer the lenses, the easier the

operation of the instrument. As a result of its superior

basic ion optic design, Autoconcept has many

benefits:

Multi-purpose Flexibility

GD90 provides for ease of source changes,

and allows both flat and pin samples of

different dimensions to be analysed directly.

Ion Optics:

The simple high precision ion optics of theAutoconcept result in an instrument whichhas high stability, sensitivity and resolution

● Autotuning is fast and easy

● Calibration is very stable

● Resolution is maintained overlong periods

● Ultimate performance isguaranteed

HIGH PERFORMANCEDesigned for h igh sensi t iv i ty, reproducibi l i ty andrel iabi l i ty in h igh resolut ion appl icat ions

The Autoconcept GD90 is a high performance mass

spectrometer dedicated to the analysis of inorganic

materials to provide accurate elemental composition

information.

The instrument features a horizontal, E-B geometry

mounted on a solid framework with a three point anti-

vibration support system (if required), resulting in a

highly stable instrument capable of achieving ultimate

detection levels in a reproducible and consistent

manner.

Transmission:

Peak traces at 1360 RP and5747 RP showing maintainedtransmission

Easy Maintenance:

As well as providing rapid sourceremoval, the GD90 source cradleis easily removed for cleaning, asshown above.

Inte

nsi

ty

m/z62.90 62.91 62.92 62.93 62.94 62.95 62.96

Resolution

1360

5747

Dual Collector:

A dual collector featuring a postacceleration detector and a Faradaycup provide maximum dynamic range

THE NEW GD90The Autoconcept GD90 is a high performance mass spectrometer designed for quantitative

analysis of solids by glow discharge MS. The system is primarily focused on bulk analysis to

sub ppb level with the minimum of sample preparation.

Small Footprint:

With space a premium in analyticallaboratories, Autoconcept GD90 requiresminimal floorspace for its class

1.9 m

0.95

m

Application Areas of Particular Interest

● metals and alloys

● ultra pure materials

● semiconductor materials

● insulators (with addition of RF)

Fully-Baked Ion Optics

Unlike other mass spectrometers of its type, Autoconcept

GD90 features full baking facilities along the entire flight

path. This helps remove contaminants from the ion optics

without the need for constant mechanical cleaning,

maintaining the sensitivity and performance of the

instrument at its peak.

Ion Optics Baking:

Flight path (outlined in blue) can be fullybaked keeping contaminants to a minimumand performance to a maximum

fully-baked ion optics

Primary Features of AutoConcept GD90

● Very high resolution important fordetermination of interference foundin matrices.

● Broad elemental coverage as thesoftware has interference data for 70elements.

● Negligible matrix effect as theatomization and ionization takesplace at different location.

● Quantitative Data to sub-ppb levels

● Isotope Ratio Analysis Depth ProfilingCapability

● Minimum sample preparation

APPLICATIONS

High Sensitivity:

Selection of a survey scan showingtungsten isotopes at an elementalconcentration of 23 ppm

Quantitative Bulk Analysis

In the normal jump-sweep mode of operation, the user

defines the elements of interest and then acquires

data by sequentially jumping the magnetic field to the

next mass of interest followed by a small voltage

sweep over the peak. The GD90 features a laminated

magnet which requires a significantly reduced settling

time compared to standard non-laminated magnets.

One benefit of this is an increase in the signal-to-noise

and hence an improvment in the limits of detection by

allowing longer peak integration periods. Alternatively,

shorter analysis times can be achieved due to the

reduced magnet settling time.

Comparison of the elemental abundance to that of the

matrix signal gives quantified composition data in the

form of ion beam ratios (IBRs) which are typically

within a factor of three of the true value. The use of

single point Relative Sensitivity Factors (RSFs) allows

absolute quantification of the data. Since the matrix

effects are low, it is possible to use existing standards

for the analysis of novel materials where matrix-

matched standards are not available.

The GD90 has the ability to quantify data over a large

dynamic range enabling the analysis of material

composition from major (%) to ultra-trace (sub-ppb)

levels in the same analytical procedure.

179 180 181 182 183 184 185 186 187

100

90

80

70

60

50

40

30

20

10

0

Rel

ativ

e In

ten

sity

m/z

W

W

W

W W

Ta

Survey Scan:

Expansion of a survey scan at4000 RP showing resolvedcomponents at m/z 28

Fast Survey Scan

The use of a laminated magnet coupled to a fast data

acquisition system means that fast survey scans can

be performed with optimal peak integration times.

Data for all elements from Li to U can be acquired and

presented within 15 minutes. Using a resolving power

of 4000, most elements can be detected to 1 ppm or

better. At 10,000 resolving power, the detection limit is

5 ppm or better.

Isotope Ratio Information

The fast jump-sweep feature enables multiple isotope

ratio data to be acquired with both accuracy and

precision. Precisions of 1% RSD and accuracies

better than 2% RSD can be achieved for elements

with concentrations as low as 200 ppm.

Depth Profiling

The increased speed of data acquisition due to the

fast scan magnet enables high resolution depth

profiling. The lack of matrix effects in GDMS enables

the quantification of data at the interface of interest

which can prove problematic for other techniques

such as SIMS.

High Resolution:

High resolution survey scan at 10,000 RP.The 96Mo isotope has been resolved fromthe 56Fe40Ar peak (resulting from argonplasma).

100

90

80

70

60

50

40

30

20

10

0

Rel

ativ

e In

ten

sity

54Fe 40ArTheoretical m/z 95.8973

Resolution required 12,450 (80ppm)

96Mo Theoretical m/z 95.9050

27.96 27.97 27.98 27.99 28.00 28.01 28.02 28.03 28.04

100

90

80

70

60

50

40

30

20

10

0

Rel

ativ

e In

ten

sity

m/z

N2+

CO+

Si+54Fe++

C2H4+

Depth Profiling:

Example of a depth profile of indium, iron,magnesium and oxygen in a treated Al surface

500 1000 1500 2000 2500 3000 3500 4000 4500

100

10

1

0.1

0.01

0.001

0.0001

1e-005

1e-006

1e-007

1e-008

Per

Cen

t

Time (secs)

16O24Mg

27Al56Fe115In

Processing:

Comprehensive data processingprograms extract the maximuminformation from each analysis

Modern Acquisition and Control System

Autoconcept GD90 is equipped with the latest in high

performance pc workstations. The data system runs on a

Windows® operating system providing some of the fastest

data acquisition and processing facilities for glow discharge

mass spectrometry. With simplicity of set up and full

automation capabilities, this combination is unbeatable for

high performance elemental analysis.

Autotune:

Automated tuning for optimisedresolution and sensitivity

Target Libraries:

Target compound libraries for rapidretrieval of repeat experimental data

Experiment Set Up:

Simple to set up experiments usingthe procedures editor

DATA SYSTEM

Graphical Interface:

The system uses a simple graphical interfacefor all control, acquisition and processingmaking it one of the most intuitive data systems

Peak Display:

Peak displays over several isotopes

Mass Spectrometry Instruments

Mass Spectrometry Instruments Ltd13 Bretton Street Enterprise CentreBretton Street, DewsburyWest Yorkshire WF12 9DBUK

Tel: +44 (0) 1924 437 026Fax: +44 (0) 1924 505 828

E-mail: info@massint.co.uk Website: http://www.massint.co.uk

All specifications and options quoted in this document are for product guidance onlyand will not form part of any contract. Potential customers should contact MSI formore detailed specifications and facilities.

Mass Spectrometry International is part of Mass Spectrometry Instruments Limited © 2008 Mass Spectrometry Instruments Ltd E&OE