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Innovations in ICP Sample Introduction

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Helix O'ring-free Spray Chambers. New Internal Standard Kit. Niagara Rapid Rinse Accessory ... Helix spray chambers. Eliminate o'ring maintenance and ... – PowerPoint PPT presentation

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Title: Innovations in ICP Sample Introduction


1
Innovations in ICP Sample Introduction
  • Jerry Dulude, Glass Expansion, Inc.
  • 4 Barlows Landing Rd.
  • Pocasset, MA

2
Summary of Discussion
  • Low Flow Nebulizers
  • Helix Oring-free Spray Chambers
  • New Internal Standard Kit
  • Niagara Rapid Rinse Accessory

Innovations in Sample Introduction
3
Applications of Low-Flow Nebulizers
  • Limited sample volumes
  • Volatile samples
  • Expensive waste disposal
  • ICP-MS-LC interface

Low-Flow Nebulizers
4
Range of Low-Flow Nebulizers
  • MicroMist- Concentric glass nebulizer
  • 0.05 to 0.6 ml/min
  • PolyCon- Concentric polyimide nebulizer
  • 0.05 to 0.6ml/min
  • OpalMist- Concentric PFA nebulizer
  • 0.01 to 0.6ml/min

Low-Flow Nebulizers
5
Transport Efficiency vs. Uptake
EFFICIENCY
UPTAKE RATE (ML/MIN)
Indirect drain collection method
Low-Flow Nebulizers
6
Tertiary Flow Rate vs. Uptake
Tertiary Flow Rate (ul/min)
Low-Flow Nebulizers
7
Corroboration of Tertiary Flow Rates
Uptake rate (ml/min) Indirect Method (mg/min) Direct Method (mg/min)
0.03 15 14
0.11 23 21
  • Todoli, Hernandis, Canals, and Mermet, JAAS,
    1999, 14, 1289-1295
  • Using GE MicroMist nebulizer with U-tube
    absorption for measurement

Low-Flow Nebulizers
8
Primary Aerosol Size Distribution Comparison
Nebulizer Gas Flow Rate 1.0 L/Min Solution
Uptake Rate Natural Aspiration
Normalized Count
MicroMist (0.03ml/min)
Normalized Volume
Low-Flow Nebulizers
9
Tertiary Aerosol Size Distribution Comparison
Nebulizer Gas Flow Rate 1.0 L/Min Solution
Uptake Rate Natural Aspiration
Baffled Cyclonic Spray Chamber
Normalized Count
Low-Flow Nebulizers
10
New Micro-Flow OpalMist
  • All PFA construction
  • Natural uptake rate of 0.010 ml/min
  • Ultra-high purity applications
  • Ideal for micro samples down to 20 ul volume

Low-Flow Nebulizers
11
Cyclonic Spray ChambersAdvances in Nebulizer
Installation
1993
1984
1996
Helix Oring free spray chamber
12
Helix O'ring-Free Spray Chamber
  • Reduced carryover
  • Faster washout
  • Higher purity
  • Can stand up to ketones and other solvents

Helix Oring free spray chamber
13
New Internal Standard KitBenefits of Internal
Standardization
  • Compensate for physical interferences
  • Viscosity
  • Surface tension
  • Compensate for some chemical interferences
  • High salts
  • Mass related effects (ICP-MS)
  • Improve short term precision (simultaneous
    detectors)
  • Decrease long-term drift

Internal Standard Kit
14
New Modular Internal Standard Kit
Internal Standard Kit
15
IS Tee with Built-in Mixing Chamber
Internal Standard Kit
16
New Flared-End Pump Tubing
The final building block of a totally modular
system
Internal Standard Kit
17
IS Schematic
Peri Pump
Sample
IS
Internal Standard Kit
18
Niagara Rapid Rinse Accessory
  • Interfaces between ICP Autosampler
  • Reduces required rinse time
  • Programmable delay time
  • Less than 8 inches high
  • Includes adj. height stand

Rapid Rinse Accessory
19
How Niagara Works
Rinse
Analysis
Rapid Rinse Accessory
20
Niagara Time Saving (30 sec rinse)
Standard System With Niagara
Probe to sample 5 5
Uptake delay 15 15
Stabilization 10 10
Read 15 15
Probe to rinse 5 5
Rinse 30 5
Total (seconds) 80 55
Rinse steps
Rapid Rinse Accessory
21
Summary
  • MicroMist nebulizers
  • Efficient sample consumption
  • Minimum waste generation
  • Helix spray chambers
  • Eliminate oring maintenance and contamination
  • Reduce carryover
  • Internal standard kit
  • Improved accuracy without the work
  • Easy inexpensive modular replacement
  • Niagara Rapid Rinse Accessory
  • More samples per hour
  • Faster sample turnaround time

Rapid Rinse Accessory
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