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Initial Investigation of the New Apex Sample Inlet System for Finnigan Neptune MC-ICPMS Dan Wiederin Elemental Scientific www.icpms.com

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Page 1: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Initial Investigation of the New Apex Sample Inlet System for Finnigan

Neptune MC-ICPMS

Dan WiederinElemental Scientific

www.icpms.com

Page 2: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Apex Sample Introduction Systemfor ICPMS

• High sample transport efficiency

• High Sensitivity at Low Flow Rates (100 to 300 µL/min)

• Low Background• Self-aspirating PFA

nebulizer• Inert, o-ring-free flow path

• Fast Rinse-out• Quartz or HF resistant

Page 3: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Apex Block Diagram

Heated Cyclonic SC(120C/140C)

Peltier-Cooled Multipass Condenser2C/-5C

Total Internal Volume 180 ml

Page 4: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Apex Q with Finnigan Neptune

• Small Size, Easy Installation.

• High sample transport efficiency.

• Utilizes PFA nebulizers from 20 to 300 µl/min.

• Low background, fast rinse-out.

Page 5: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Relative Signal Intensity Comparison Apex vs. Aridus

020406080

100120140160

7Li 56Fe 88Sr 180Hf 208Pb

Aridus T1H Apex 95 µL/min Apex 300 µL/min

Sign

al In

tens

ity (

ThermoFinnigan Neptune MC-ICPMS, HP ConeLi 1 ppm, Fe 3 ppm (HR); Sr, Hf, Pb: 200 ppb

Page 6: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Neptune/Aridus200 ppb Sr-88 Spectrum

Aridus Sweep = 6.28, N2=0 Spray chamber 70 C, Desolvator 160 C

16 V

Page 7: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Neptune/Apex-IR PFA-100 200 ppb Sr-88 Spectrum

51.5 V

Page 8: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Rate of Argon Oxide Formation SIS vs. Apex vs. Aridus

Neptune MC-ICPMS1300

4.2 0.150

200

400

600

800

1000

1200

1400

SISApexAridus

ArO

+ (Equivalent 56Fe C

onc, ppb)

Page 9: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Apex Q Rinse-out U-238Six Orders of Magnitude

PFA ST Nebulizer/Finnigan ELEMENT2

3 Orders in 20 s

5 Orders in 60 s

10 ppb

10 ppq

Page 10: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Sr 100 ppb (NBS 987)Neptune/Apex-IR PFA-100

Page 11: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Sr 10 ppb (NBS 987)Neptune/Apex-IR PFA-100

Page 12: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Sr Ratios (NBS 987) Apex-Neptune-PFA Nebulizer

Standard Error (abs) x10-6

SIS/PFA-50 Apex /PFA-100

200 ppb Sr 10 ppb Sr 100 ppb Sr

84Sr/86Sr* 15.3 25.8 2.8

87Sr/86Sr* 3.9 7.8 2.7

88Sr/86Sr 123 111 49.8

*Ratio normalized to 88Sr/86Sr

Page 13: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Summary: Apex with Finnigan Neptune

• Highly efficient and sensitive inlet system for MC-ICPMS.

• Alternative to membrane desolvation systems.

• Low memory effects and fast rinse-out.

• Oxides reduced >200x vs. standard inlet but higher than membrane desolvation.

• Couples with nebulizers having a wide range of liquid flow rates (20-300 µL/min).

Page 14: Initial Investigation of the New Apex Sample Inlet System for ...74.126.57.43/powerpoint/Apex-Neptune-short.pdfAridus T1H Apex 95 µL/min Apex 300 µL/min Signal Intensity (V) ThermoFinnigan

Acknowledgment

Edward YoungUCLA

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