单颗粒物ICP-MS质谱仪是如何工作的?
单颗粒物ICP-MS质谱分析具有以下两个主要要求:
· 样品中的颗粒物数浓度非常低,以降低将多个颗粒物同时引入ICP-MS质谱仪的可能性
· 质谱质量分析仪以不到2毫秒的驻留/积累时间不间断运行,以观察持续的单颗粒物事件
单颗粒物多元素ICP-MS质谱仪
随着纳米颗粒物在日常产品应用范围和生产规模的持续增加,人们越来越担心其对环境和生命系统(包括人类)可能造成的潜在负面影响。与类似的天然源颗粒物相比,释放到环境中的工程纳米材料的浓度仍然非常低。有效检测出这些人造颗粒物对预测其未来对环境和生命系统的影响至关重要。可以想象,要在复杂的环境背景中准确识别出低浓度颗粒物非常具有挑战性。最近,相关研究人员提出使用多元素spICP-MS质谱分析法对单颗粒物进行指纹识别,提供了解决该问题的一种可能解决方法。举例来说,业界已成功运用该方法在含有天然铈粒子的复杂背景下追踪土壤中的二氧化铈(CeO2)工程纳米颗粒物[2]。
延伸阅读
1. Degueldre, C. and P.Y. Favarger, Colloid analysis by single particle inductively coupled plasma-mass spectroscopy: a feasibility study. Colloids Surf., A, 2003. 217(1-3): p. 137-142.
2. Praetorius, A., et al., Single-particle multi-element fingerprinting (spMEF) using inductively-coupled plasma time-of-flight mass spectrometry (ICP-TOFMS) to identify engineered nanoparticles against the elevated natural background in soils. Environ. Sci.: Nano, 2017. 4(2): p. 307-314.
3. Scanlan, L.D., et al., Silver Nanowire Exposure Results in Internalization and Toxicity to Daphnia magna. ACS Nano, 2013. 7(12): p. 10681-10694.
4. Suzuki, Y., et al., Real-time monitoring and determination of Pb in a single airborne nanoparticle. Journal of Analytical Atomic Spectrometry, 2010. 25(7): p. 947-949.
5. Hineman, A. and C. Stephan, Effect of dwell time on single particle inductively coupled plasma mass spectrometry data acquisition quality. Journal of Analytical Atomic Spectrometry, 2014. 29(7): p. 1252-1257.
6. Pace, H.E., et al., Determining Transport Efficiency for the Purpose of Counting and Sizing Nanoparticles via Single Particle Inductively Coupled Plasma Mass Spectrometry. Analytical Chemistry, 2011. 83(24): p. 9361-9369.
7. Gschwind, S., et al., Capabilities of inductively coupled plasma mass spectrometry for the detection of nanoparticles carried by monodisperse microdroplets. Journal of Analytical Atomic Spectrometry, 2011. 26(6): p. 1166-1174.
8. Peters, R.B., et al., Development and validation of single particle ICP-MS for sizing and quantitative determination of nano-silver in chicken meat. Analytical and Bioanalytical Chemistry, 2014. 406(16): p. 3875-3885.
9. Mitrano, D.M., et al., Detecting nanoparticulate silver using single-particle inductively coupled plasma-mass spectrometry. Environmental Toxicology and Chemistry, 2012. 31(1): p. 115-121.
来源于:南京拓服工坊(TOFWERK中国)
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