Biomedical and Environmental Research Group

Analytical instruments

  • Multifunctional, energy dispersive X-ray system (EDXRF), utilizing high-power (up to 3 kW) X-ray tube (available anodes: Cr, Mo, Ag, W) comprising of three independent X-ray spectrometers: (1) secondary/polarizing target X-ray fluorescence spectrometer, Si(Li) detector (30 mm2 active area, 3 mm effective thickness, 1 mil Be window); (2) total reflection X-ray fluorescence spectrometer, Si(Li) detector (30 mm2 active area, 3 mm effective thickness, 0.5 mil Be window); (3) scanning, micro-beam X-ray fluorescence spectrometer, minimum beam diameter 15 micrometers (obtained with single glass capillary with tapered inner channel), Si(Li) detector (80 mm2 active area, 3 mm effective thickness, 0.5 mil Be window), xyzΘ motorized sample stage, optical microscope coupled to a CCD camera, PC/FPGA-based measurement control and data acquisition system.
  • Confocal X-ray microscope utilizing low power (50 W) micro-focus X-ray tube (Mo anode) with spatial resolution equal to about 30 micrometers comprising of silicon drift detector (10 mm2 active area, 0.45 mm effective thickness, 0.5 mil Be window), polycapillary lens (primary beam focusing), polycapillary conical collimator (collection of the excited X-ray fluorescence radiation), xyz motorized sample stage, xyzΘ motorized detector stage, optical microscope coupled to CCD camera, PC-based measurement and data acquisition system.
  • Portable, radioisotope source based, X-ray fluorescence spectrometer comprising of annular 238Pu source, Si-PIN thermoelectrically cooled X-ray detector (7 mm2 active area, 0.3 mm nominal thickness, 0.5 mil Be window), battery powered signal processing electronics, PC-based data acquisition software.
  • Fourier transform infrared spectrometer (FTIR).

Sampling and sample preparation

  • Air particulate matter samplers PM2.5 and PM10.
  • Ball mill, agate mortar, sieves, hydraulic press for preparation of powdered samples and pellets.
  • Pressurized (TEFLON bomb), chemical digestion system, water purification system, freeze-dryer, liquid nitrogen sample storage, clean room.