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Selecting the OptimumSample Introduction System for ICP‐OES
AAPFCO 2017 ANNUAL MEETINGFebruary 21st, New Orleans , LA
Dr. Sergei Leikin, Texas Scientific Products LLC
ICP-AE Spectrometer$70,000-100,000
ICP Nebulizer $400-1500
Investing into ICP Technology
Analytical Nebulizers
Analytical Nebulizers:Are these THE SAME TYPE?
CONCENTRIC NONCONCENTRIC
SL1
Slide 4
SL1 Sergei Leikin, 6/22/2016
What is the “Industry Standard”?
Concentric Nebulizer – still the most commonly used
Why ‐ it “comes” with an instrument
Is it the best for your application?
What are the Fertilizer Samples ?
0.11 M Ammonium Citrate and 0.033 M Disodium EDTA pH neutral Solution
High Particulate Content !
Concentric Nebulizer Configuration:Meinhard, Conikal, Seaspray, Aerosalt
Good nebulization efficiency and precision
Low tolerance to particles of only < 75 m
Small Sample Channel ID (a): 0.15-0.25 mm
Concentric Nebulizer Configuration:Typical Blockages
Blocked Gas Channel
Sample material deposits at the orifice (José‐Luis Todoli, Jean‐Michel Mermet, Liquid Sample Introduction in ICP Spectrometry: A Practical Guide, 2011).
What is an Alternative to an “Industry Standard?”
A NonConcentric Design
Babington V‐Groove Type
Parallel Path
V‐Groove Type Nebulizers
Glass or Quartz
Inert
Vee Spray
What are the Performance Challengesfor NonConcentric Nebulizers?
Sensitivity and
Precision!
Opti‐Series Nebulizers:Design Details
Gas
Liquid Sample
Mist
Sample Orifice
Gas Orifice
OptiSolids XL™ Nebulizer Nonconcentric Configuration
Sample ChannelID = 1.0-2.0 mml
Gas Channel
Handles VERY large particulates over 1000 μm and high amount of TDS up to 30%
Good precision and sensitivity comparable to Concentric
High Salts/High TDS
OptiSolids XL™ Nebulizer: Sample Introduction
1.0 mm ID 0.5–0.75 mm
Sample Introduction System Setup for the ICP-OES Fertilizer Extracts Analysis
OptiSolids XL™ Nebulizer Cyclonic Spray Chamber
High Salt Sample Analysis Data
Dilution Factor – 1:10
0.0720.163RSD, %
Data is a courtesy of an Oilfield Labs of America
Data is a courtesy ofUniversity of KY, Division of Regulatory Services Fertilizer Program
Represented by analyses of 210 fertilizer extracts over two months period
Concentration ranges, mg/L :K 20 -1000; P 2 – 500
Spectro BLUE SOP (Radial) ICPOptiSolids XL and Concentric Nebulizers
Calibration Curve for K 769.89 nm Analytical Line
Calibration Curve for K 769.89 nm Analytical Line
0.999968
Calibration Data for K 769.89 nm Analytical Line
Precision Comparison
0
0.5
1
1.5
2
2.5
K 766.4 K 769.9 P 177.5 P 178.2 P 213.6 P 214.9
RSD, %
OptiSolids XLConcentric
Precision Comparison forSc Internal Standard
0
0.2
0.4
0.6
0.8
1
1.2
Sc 361 nm
RSD, %OptiSolids XL Concentric
Cost Comparison: OptiSolids XL™ ‐ Concentric
Lifetime:Concentric ‐ 2 per 1 year OptiSolids XL™ ‐ 1 over 2 years
Cost estimation over 2 years:
Concentric $750x2x2= $3000OptiSolids XL™ $565
Analytical Benefits of the OptiSolids XL™Nebulizer for Fertilizer Extracts Analysis
Robust handling of samples with large particulates content without clogging Higher productivity (less interruptions and maintenance required) Precision comparable to or exceeding Concentric type
THANK YOU FOR YOUR TIME