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FOR EXPERT REVIEW PANEL USE ONLY
NOT FOR DISTRIBUTION
2
Pros/Strengths:
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ICP-AES is a proven, mature technology
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MLT run with a great variety of instruments
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Variety of microwave digestion systems were used
o
6 CEM MARS
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3 Milestone Ethos
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1 Analytikjana TOPWave
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1 Milestone UltraClave
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1 NOVAWAVE
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2 unidentified
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Variety of ICP instruments –
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Old and new models
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Both Eschelle based optics and Paschen Runge/Roland Circle optics
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8 Perkin Elmer instruments – 4 models of varying age
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1 Thermo
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1 Varian
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1 Agilent
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2 Spectro
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1 Unknown
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Both Axial and radial view of plasma used
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10 labs used axial view for Fe, Cu, Mn and Zn
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Great performance on NIST 1849a. No bias for any element.
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Not many outliers considering the size of the data set
Cons/Weaknesses
Supporting Data
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General Comment:
14 Laboratories from 11 countries
Included SPIFAN matrices plus IDF SAMPLES: milk, milk powder, whey powder, whey protein
concentrate, butter and processed cheese
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Method Optimization: