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Instrumentation
Our group specializes in instrument design for cloud and fog sampling. The 5-stage cloud collector (shown below) was recently designed and tested in our laboratory and has been used in several recent field campaigns. Click here to see some of the many other cloud and fog sampling instruments we currently use.
The CSU 5-stage Cloud Collector is designed to collect cloud drops in five different size ranges for chemical analysis. It has been used in field campaigns at Whiteface Mountain, New York, Davis, California, and Angiola, California.
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Our new laboratories, opened in summer 2005, are well equipped for chemical analysis of atmospheric samples. A Hewlett Packard 6890/5973 GC-MS and an HP 1050 HPLC are being used to expand our research into the study of the organic composition of aerosol particles and fogwater. Addition of an LC/MS Q-TOF system, planned for early 2006, will further aid our research. Other analytical instruments in our laboratory include four Dionex DX-500 Ion Chromatographs, a Capillary Electrophoresis system, a Varian model 640Z Graphite Furnace Atomic Absorption Spectrometer, a Shimadzu model 5000A Total Organic Carbon Analyzer, and several spectrophotometers and pH meters.
 
Photos taken inside our new laboratories. An equipment design and testing laboratory is not shown.
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We also have instruments for continuous measurement of gaseous sulfur dioxide and hydrogen peroxides, a Magee Scientific Aethalometer for aerosol black carbon measurements, an R&P continuous particulate carbon monitor, a Particle-Into-Liquid Sampler (PILS), and several impactors, denuders (URG and ETH) and filter samplers for collection of organic and inorganic aerosols and trace gases. The CSU atmospheric chemistry group has several instruments for generating calibration aerosols and measuring their size distributions. These include TSI atomizers a TSI vibrating orifice aerosol generator (VOAG), Climet and PMS optical particle counters, several TSI differential mobility analyzers, and a TSI aerodynamic particle sizer. Several of these instruments are operated by the group of Prof. Sonia Kreidenweis. The atmospheric chemistry program also has a Hygroscopic Tandem Differential Mobility Analyzer (HTDMA) and a Dilution Tunnel Sampler (built by DRI) for sampling of particles produced by various combustion processes.
We are currently working with CSU colleague Prof. Sonia Kreidenweis and scientists at UC Davis to complete a 30' mobile air quality laboratory (see photo below) designed for characterization of the chemical, physical, and optical properties of atmospheric aerosols. The lab will house instrumentation for measurements of trace gases (CO, NOx, NH3, O3 and SO2), aerosol composition (PILS, denuder-filter pack samplers, MOUDI, Sunset OC/EC analyzer), aerosol size distributions (DMPS, OPC, APS), particle light scattering and absorption (nephelometers, aethalometer), and particle hygroscopicity.
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atmosphericsci
