Microwave plasma torch is used as exaction power, and Argon is used as work gas. Contents of copper and iron in gasoline were determined by microwave plasma torch atomic emission spectrometry (MPT-AES) with pneumatic nebulization sample introduction system. The influence of microwave power, support gas flow rate, work gas flow rate, oxygen shielded gas on the contents of copper and iron were discussed and optimized. The experimental results show that the detection limits of copper and iron are 5.3 and 22.1 μg/L respectively; RSD of the method is less than 2.83%; the linear ranges of copper and iron are 0.05～60 and 0.1～100 mg/L respectively; the recoveries of sample are in the range of 95.1％～103.5％. The method has many features,such as high sensitivity, rapidity, less sample quantity, low maintenance cost and accurate.

The analytical method for antimony element in nickle passivator was studied by microwave plasma torch atomic emission spectrometry (MPT-AES). Using microwave plasma torch (MPT) as excitation light source, argon as support and carrier gas, and peneumatic nebulization sampling system. Some experimental parameters, including microwave forward power, flow rate of carrier gas and support gas, oxygen shield pressure, effect of acid, coexistence ions were investigated and optimized. The detection limits was 1.9 μg/L. The recover was in the range of 99.2%～100.3%, and its RSD was 2.10％. The Linear range of the antimony elements was 0.01～100 mg/L. MPT-AES was an effective and practical method for determination of antimony in nickle passivator.