A UNIVERSAL PROGRAMMABLE TEMPERATURE SPRAY CHAMBER

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A UNIVERSAL PROGRAMMABLE TEMPERATURE SPRAY
CHAMBER

• Jerry Dulude, Glass Expansion, jdulude_at_geicp.com

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Limitations of Room Temperature Spray Chambers

• Intensity drift with temperature
• Excessive plasma loading (volatile solvents)
• Excessive oxide formation
• Insufficient control of analyte transport

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Limitations of Externally Controlled Spray
Chambers

• Requires antifreeze solution
• Requires bulky floor model chiller
• Messy coolant lines from chiller to chamber
• Freezing of condensate on lines
• Requires intricate jacketed chamber

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IsoMist Controlled Temperature Spray Chamber
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IsoMist Encapsulated Spray Chamber
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Features of IsoMist

• Powerful Peltier-effect chiller reaches -5C in 15
  minutes
• Programmable from -10 to 60C in 1 degree
  increments
• Maintains temperature to within 0.1 degree
• Custom software runs from any PC
• Compact design (7.5x4x4 inches)
• 100 self-contained (no external lines)
• Incorporates Bluetooth technology for clean
  wireless control (USB available)

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PC Screen showing IsoMist Software
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Applications of the IsoMist

• Analyze volatile solvents
• Reduce oxide interferences
• Lower detection limits
• Increase stability

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Determination of Trace Metals in Naphtha

• Interfere with the cracking process
• Poisoning of the catalysts
• Environmental release concerns
• Origin and migration markers

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Analysis of Naphtha by ICP-OESPE Optima 2100 DV
(Axial view)

• Forward Power 1500Watts
• Coolant flow 20L/min
• Auxiliary flow 1.8L/min
• Nebulizer gas flow 0.35L/min
• Injector 1mm capillary bore
• Spray Chamber Twister baffled cyclonic
• Nebulizer SeaSpray glass concentric
• Uptake rate 300ul/min
• IsoMist temperature -10C

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IsoMist on Optima 2100DV
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Spike Recoveries in Naphtha
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Oxide Reduction in ICP-MSIsobaric oxide
interferences
Element/Isotope Interference
56Fe 40Ar16O
51V 35Cl16O
44Ca 14N14N16O
48Ti 32S16O
52Cr 34S18O
64Zn 32S16O16O
64Zn 48Ca16O
Robert Thomas, Practical Guide to ICP-MS, Marcel
Dekker, NY, 2004.
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Reducing Oxides for ICP-MS
Data courtesy of David Jones, ALS Chemex,
Brisbane, Australia
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Analysis of Limited Sample Volumes

• Biological applications
• Intracellular fluids
• Neonatal samples
• Forensic applications
• Requires micro flow nebulization
• Low DLs desirable

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Effect of Temperature on Normalized Intensity
(20ul/min Uptake) ICP-OES
PE Optima 2100DV
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Effect of Temperature on DL20ul/min Uptake
(ICP-OES)
PE Optima 2100DV
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Stability EnhancementICP-OES
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IsoMist Compatibility
Models

• PE ICP ICP-MS
• Varian ICP ICP-MS
• Agilent ICP-MS
• ThermoFisher ICP ICP-MS
• Horiba J-Y ICP
• Teledyne Leeman ICP
• GBC ICP
• Spectro ICP

Spray Chamber Materials

• Borosilicate glass
• Quartz
• Inert PFA