A Programmable Universal Temperature Controlled Spray Chamber for ICP-OES and ICP-MS

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A Programmable Universal Temperature Controlled
Spray Chamber for ICP-OES and ICP-MS

• Jerry Dulude, Ron Stux, and Vesna Dolic, Glass
  Expansion, jdulude_at_geicp.com

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Limitations of Room Temperature Spray Chambers

• Sensitivity 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
• Cumbersome 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 (chamber interior)
• Programmable from -10 to 60C in 1 degree
  increments
• Maintains temperature to within 0.5 degree
• Compact design (7.5x4x4 inches)
• 100 self-contained (no external lines)
• Incorporates Bluetooth technology for clean
  wireless control (USB available)
• Compatible with all ICP-OES and ICP-MS models

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PC Screen showing IsoMist Software
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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

Too volatile for room temperature analysis due
to excessive plasma loading
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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

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IsoMist on Optima 2100DV
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Analysis of Naphtha by ICP-OESSample Preparation

• Blanks Standards 100 kerosene
• Samples 100 Naphtha
• Spikes Naphtha S-21 (Conostan)
• Internal Standard 0.5ppm Co (Conostan)
• IsoMist Temperature -10C

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Naphtha ReproducibilityNeat Sample
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Spike Recoveries
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Analysis of Limited Sample Volumes

• Biological applications
• Intracellular fluids
• Neonatal samples
• Forensic applications
• Requires micro flow nebulization
• Low DLs desirable
• Alternative to HEN/Direct injection

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Effect of IsoMist Temperature on Normalized
Sensitivity (20ul/min Uptake)
PE Optima 2100DV
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Effect of IsoMist Temperature on DL
PE Optima 2100DV
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IsoMist Benefits

• Enables the analysis of volatile organics
• Enhances sensitivity for limited volume samples
• Reduces isobaric oxide interferences
• Increases the chance of passing QCs
• Provides a record for regulatory compliance
• 2C 10 shift in sensitivity