Basic Training 4th Annual ICP Conference
Challenging ICP analyses
1. Silicon in silicone oils 2. Sulfur in steel 3. Iodine in biologicals
Possible difficulties? • Element chemistry (e.g., volatility) • Sample matrix • Sample preparation critical • ICP characteristics
• Poor ionization (sensitivity) • Emission lines / Mass range • Standards / Sample compatibility
Silicon in silicone oils
1 – Planning Polydimethylsiloxane (PDMS, aka dimethicone ) - Contact lenses - Food (anti-foaming agent) - Bathroom caulk Detection limits/uncertainty Chemical composition
IDLs: OES = 5 – 50 ppb MS = 0.1 – 5 ppb
38% wt. Si
H 6
OSi) n
(C 2
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