Abstract: A method and system for enabling the determination of kinetic rates of reaction within a fluid of interest including directing fluid flow exiting a test bed to a multi-port switching valve. The multi-port switching valve switches the fluid to a number of channels connected to a number of interchangeable in-flow extraction cartridges. Analytes of interest from the fluid flow are captured on an extraction medium to accumulate over time. Rates are determined by (i) sequentially channeling the fluid through each of the plurality of flow paths for a preselected time duration, (ii) analyzing the extraction cartridges, and computing the kinetic rate of reaction.

Abstract: A method and system for enabling the determination of kinetic rates within a fluid of interest including directing fluid flow exiting a test bed to a multi-port switching valve. The multi-port switching valve to switches the fluid to a number of channels connected to in in-flow extraction cartridge. Analytes of interest from the fluid flow our concentrated and captured on an extraction medium. Rates are determined by (i) sequentially channeling the fluid through the each of the plurality of channels for a preselected time duration, (ii) analyzing the extraction cartridges, and computing the kinetic rate of interest.

Abstract: Contaminant mass collection in saturated sedimentary environments for bioavailability determination. A casing includes a screen between the environment that is subject to sampling, such as a saturated sediment and the device itself. The casing includes a water intake zone, a pump, and sorptive media. The water intake zone, the pump, the screen and the sorptive media, are all operably linked in sequence. The screened casing is secured to form an in situ device; the screen is in fluid communication with the water intake zone and excludes endemic sediments and aquatic life. The in situ device is deployed in the saturated sedimentary environment. The pump operates to concentrate analytes from the selected environment in the sorptive media, where the concentrated analytes include the analyte mass of time-weighted fluid samples.

Abstract: Methods for sample collection for assessment of air quality include generating an atmospheric condensate from air to be sampled, and collecting the atmospheric condensate in a collection vessel for subsequent use and analysis. Atmospheric condensate may be generated through a heat exchange module, such as a cold trap or the cooling coils of an HVAC system. The collection vessel may be an ultraclean glass jar or a cold trap. Air may be sampled actively or passively for both chemical and biological agents.

Abstract: Contaminant mass collection in saturated sedimentary environments for bioavailability determination. A casing includes a screen between the environment that is subject to sampling, such as a saturated sediment and the device itself. The casing includes a water intake zone, a pump, and sorptive media. The water intake zone, the pump, the screen and the sorptive media, are all operably linked in sequence. The screened casing is secured to form an in situ device; the screen is in fluid communication with the water intake zone and excludes endemic sediments and aquatic life. The in situ device is deployed in the saturated sedimentary environment. The pump operates to concentrate analytes from the selected environment in the sorptive media, where the concentrated analytes include the analyte mass of time-weighted fluid samples.