Basic Training 4th Annual ICP Conference

Sulfur in steel

3 – Sample Measurement Optical Emission or Mass Spec?

ICP-OES

ICP-MS

1. Detection limits

dilution factor vs. IDLs

2. Matrix (complex) 3. Wavelengths / Masses 4. Standard compatibility

good options

~monoisotopic, interferences

N/A

N/A

Assume 500 ppm S in sample = 1 ppm S in analytical solution (MS dilution >500x (0.2% TDS)

Sulfur in steel

3 – Sample Measurement Optical Emission or Mass Spec?

ICP-OES

ICP-MS

1. Detection limits (Method) 2. Matrix (complex) 3. Wavelengths / Masses 4. Standard compatibility

IDL (50 ppb) * 500x = 25 ppm MDL

IDL (1 ppb) * 500x = 500 ppb MDL

good options

~monoisotopic, interferences

N/A

N/A

Assume 500 ppm S in sample = 1 ppm S in analytical solution (MS dilution >500x (0.2% TDS)

ICP-MS slight advantage (?)

Estimated MDL ≈ IDL * Dilution Factor