prodigy dc arc pittcon 09 presentation

5/24/2018 Prodigy Dc Arc Pittcon 09 Presentation

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www.leemanlabs.com

Prodigy DC Arc

Garry Kunselman, Maura Mahar and Peter BrownTeledyne Leeman Labs 6 Wentworth Drive Hudson, NH 03051

And

Paul DalagerAnalytical Reference Materials international


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Why DC Arc ?

www.leemanlabs.com

The DC Arc Perspective

Fast, quantitative multielement analysis of difficult to dissolve samples

are hallmarks of the DC Arc approach.

Few other techniques can challenge the ease-of-use or productivity of

DC Arc for samples that are difficult or impossible to digest.

AA, ICP and ICP - MS are powerful techniques but typically requirethe sample be put into the liquid form.

the digestion process always results in a large dilution of theanalyte elements, problem for many apps

the digestion process does not eliminate the sample matrix, this

is a problem for applications with matrix element

spectral interferences


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Prodigy DC Arcstate-of-the-art DC Arc

Prodigy - The possibilities are limitless !

Fast, quantitative multielement analysis of difficult to dissolve

samples are hallmarks of the DC Arc approach.

Advantages Include: Speed of analysis typically about 1 minuet per sample

Great for difficult to dissolve samples

No sample digestion

ideal for ceramics, metal nitrides, metal carbides,

ideal for graphite

ideal for geological materials and soils

ideal for nuclear material (e.g. uranium oxide, plutonium oxide)

Favorable limits of detection (typically < 1ppm in the solid)

eliminates the sample dilution inherent in acid digestions

ideal for trace elements in high purity Cu

ideal for trace elements in precious metals


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Prodigy DC Arcstate-of-the-art DC Arc

The DC Arc Plasma Source Sample deposited into electrode cup

High temperature DC Plasma struck between electrodes

Analyte is distilled away from matrix or consumed with it Analyte signal is time dependent

Does not require argon or other gases for many applications


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Brief History of DC Arc - photographic

Original Instruments were 3.4 m Photographic Plate Spectrometers

Captured the full spectrum photographically, but were cumbersome in

terms of data handling no computers

Photographic plates are no longer available


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Brief History of DC Arc PMT & CID

AtomComp 2000

Good instruments, but no

longer built or supported. Stand alone aftermarket source with

Fiber optic interfaceUV issues, worldwide support issues


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Brief History of DC Arc

The TJA Stand

Historical DC Arc Sources

Awkward jaw style electrode clamps

Awkward Stallwood jet

The Spex Stand


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Brief History of DC Arc

Historical Issues Associated with DC Arc

Analysts that use them absolutely swear by them

no other technique that provides what the DC Arc does

Photographic plates are no longer available for the 3.4 m

Early Arc sources were a bit cumbersome and not automated difficult jaw style electrode clamps

awkward Stallwood jets

no current control of the source Limited market of 10 to 20 units per year led to limited investment in

improvements of the technology or instrumentation


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Prodigy DC Arc state-of-the-art DC Arc

Automated, compact, bench top DC Arc

Ergonomically designed arc stand

Simple electrode changes

Built in Stallwood Jet

Improved precision

current controlled of the DC Arc Simultaneous background correction

Simultaneous internal standardization

Powerful full spectrum data capture Provides qualitative and/or quantitative analysis

Allows spectral addition and subtraction


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Prodigy DC Arcs state-of-the-art DC Arc source

current control of the arc current

simple electrode changes

built-in Stallwood Jet


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Prodigy DC Arcs state-of-the-art DC Arc source


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Ergonomic improvements to the DC Arc stand

Access to The Counter Electrode

Counter electrode rotates out of the way so you do not have to crank itup and down for each sample

Simply rotate the electrode holder and change the electrode.


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Sample Electrode Insertion

Counter electrode rotates out of the way

The new sample electrode and be inserted from the top or bottom of theelectrode holder and as accurately positioned automatically.


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Easily accommodates a wide range of sample electrodes

Mushroom electrode (for Cu analysis) shown with counter electrodeslightly raised.


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Fully Automated / Programmable control of source parameters

Independently programmable control of the arc current as

well as argon and oxygen gases (when used)


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Data collection versatility Fast qualitative analysis for spectral fingerprinting

Time resolved analysis for method development

Fast accurate quantitative analysis The peak area can be placed anywhere in the subarray

peak area can be changed from 1 pixel to any number of pixels wide

The background points can be placed anywhere in the subarray can be single or double sided

can contain multiple pixels


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Advanced Calibration Capability

Fractional Exponent Quadratic handles extreme curvature with improved accuracy ( in green)

Note: simple

quadratic curve

fits poorly


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Time Resolved Analysis scan of silicon carbide


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Full Spectrum Acquisition of Ni

Note signal from wavelengths below Carbon 193.0


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Prodigy DC Arc Provides:

Automated, compact, bench top DC Arc

Ergonomically designed arc stand

Simple electrode changes

Built in Stallwood Jet

Improved precision

current controlled of the DC Arc

Simultaneous background correction

Simultaneous internal standardization

Captures full spectrum

Provides qualitative and/or quantitative analysis

Allows spectral addition and subtraction

prodigy dc arc pittcon 09 presentation

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