【摘 要】
：
An accurate and precise method was developed for measurement of siliconisotope compositionin PM2.5by multicollector inductively coupled plasma mass spectrometry(MC-ICP-MS)in high resolution mode.ThePM
【机 构】
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State Key Laboratory of Environmental Chemistry and Ecotoxicology,Research Center for Eco-Environmen
【出 处】
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43rd International Symposium on High Performance Liquid Phas
论文部分内容阅读
An accurate and precise method was developed for measurement of siliconisotope compositionin PM2.5by multicollector inductively coupled plasma mass spectrometry(MC-ICP-MS)in high resolution mode.ThePM2.5 samples were dried under 1000Kfollowed by alkaline fusionwithsodium hydroxideto transformsilicon intosilicate anion.Then,cationexchangechromatographywas adopted to removeother interference ions,such as iron ion,aluminium ion and sodion.Astandard-sample bracketing method was applied to correct the mass discriminationin MC-ICP-MS measurements.The precision of this method could reach0.1‰and was close to the precision of the standard material measurement.This methodhas been successfully appliedto analyzesiliconisotope ratios inPM2.5samples collected in Beijing,China.
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