Single particle analysis of suspended soil dust from Southern California
Single particle analysis of suspended soil dust from Southern California
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DOI：
10.1016/s1352-2310(99)00338-6
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发表时间：
2000
影响因子：
5
通讯作者：
P. Silva;Richard A Carlin;K. Prather
中科院分区：
文献类型：
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作者：
P. Silva;Richard A Carlin;K. Prather
土壤粉尘的单颗粒分析已进行使用气溶胶飞行时间质谱。在单个粒子的质谱中观察到地壳元素的存在。铝和铁构成两种最常检测到的阳离子。在土壤颗粒的质谱中观察到的其他常见阳离子包括钠、镁、钾、钙、钛和钡，以及锂和镧系元素氧化物，它们不能通过常规技术如X射线荧光检测到。硅酸盐占检测到的阴离子的大部分，尽管也观察到磷酸盐的存在。正负离子质谱中的特征峰使我们能够识别大气样品中的单个尘埃颗粒，并使用气溶胶飞行时间质谱法以15分钟的时间分辨率跟踪大气中化学性质不同的尘埃颗粒。
Single particle analysis of soil dust has been performed using aerosol time-of-flight mass spectrometry. The presence of crustal elements is observed in the mass spectra of individual particles. Aluminum and iron constitute the two most commonly detected cations. Other common cations observed in the mass spectra of soil particles include sodium, magnesium, potassium, calcium, titanium, and barium, and also lithium and lanthanide oxides which are not detectable by conventional techniques such as X-ray fluorescence. Silicates make up the bulk of detected anions, although the presence of phosphate is also observed. Characteristic peaks in both the positive and negative ion mass spectra enable us to identify individual dust particles in atmospheric samples and track chemically distinct dust particles in the atmosphere with a temporal resolution of 15min using aerosol time-of-flight mass spectrometry.