From:  High-resolution trace element profiling of culinary spices using ICP-MS: a comparative study on nutritional and toxicological markers for food safety surveillance

 Optimal operating conditions for ICP-MS analysis of the studied samples.

ParameterCondition
Plasma power (W)1,550
Nebulizer flow (L/min)1.05
Peristaltic pump speed (rpm)25
Cool gas flow (L/min)14
Auxiliary flow (L/min)0.8
CCT entry lens (V)–110
CCT exit lens (V)–40
Cooling water flow (L/min)14
D1 lens (V)–347.16
D2 lens (V)–158
4.5 bkg< 0.5 CPS
220.7 bkg< 2.0 CPS
59Co/35Cl·16O> 18.0 CPS
59Co> 50,000.0 CPS
238U> 300,000.0 CPS
140Ce·16O/140Ce< 0.03 CPS
115In> 100,000.0 CPS

bkg: background signal; CCT: collision cell technology; CPS: counts per second; ICP-MS: inductively coupled plasma mass spectrometry. Ratios such as 140Ce·16O/140Ce and 59Co/35Cl·16O are used to monitor oxide formation and polyatomic interferences in ICP-MS performance.