汽油中多元素检测方案(ICP-AES)

Multi-elemental determination of。 ggasoline using Agilent 5100 ICP-OESwith oxygen injection and a temperaturecontrolled spray chamber Introduction Trace metals in gasoline are a major source of environmental pollution. They can also adversely affect theperformance of automotive engines. Silicon (Si) contamination can be especially problematic as deposits damagecomponents such as catalytic convertors and oxygen sensors leading to costly repairs. ICP-OES is often used forthe determination of trace elements in petroleum products due to its reliability， robustness and sensitivity. Asuccessful analysis needs to take account of sample characteristics， such as the high volatility of gasoline.Continuous loading of the plasma with gasoline can affect the stability of the signal and lead to carbon build up onthe torch that may cause the plasma to extinguish. 2 In this study， the Agilent 5100 Synchronous Vertical DualView (SVDV) ICP-OES was used for the analysis of 21 elements in gasoline， including Si. Oxygen was added to theauxiliary argon gas flow to reduce carbon build up on the torch， maintain a stable plasma and reduce carbonemission from the organic solvent. A programmable temperature spray chamber， set to -10℃， was used to reducevapor loading on the plasma， ensuring a more stable plasma. · Agilent Technologies