Modelling and field application of the Chemcatcher passive sampler calibration data for the monitoring of hydrophobic organic pollutants in water

Monitoring of Aquatic Environments Using Passive Samplers

“…In this case a bell shaped relationship was obtained even for the desorption sampling rates for PRCs. Sampling rates increased with logPow value reaching a maximum at about logPow value of 5.0 and thereafter started decreasing [16].…”

“…In another recent study, the exchange kinetics in the Chemcatcher were modeled to obtain a better understanding of the mechanism of the accumulation process and to enable measurements of TWA concentrations of compounds in the field [16]. The sampling rates for various poly aromatic hydrocarbons and some organochlorine pesticides were plotted against their logPow values [15,16]. In this case a bell shaped relationship was obtained even for the desorption sampling rates for PRCs.…”

“…Chemcatcher [4,15,16], MESCO [17] and membrane-assisted passive (MAPs) [18] are such samplers working in the kinetic regime. It is also possible to operate the SPMD in the kinetic regime as long as it is not deployed long enough for the analytes to reach equilibrium [19].…”

“…Therefore, in situ calibration of the passive samplers seems to be the most promising approach to assure quality of the data especially for quantification purposes. In another recent study, the exchange kinetics in the Chemcatcher were modeled to obtain a better understanding of the mechanism of the accumulation process and to enable measurements of TWA concentrations of compounds in the field [16]. The sampling rates for various poly aromatic hydrocarbons and some organochlorine pesticides were plotted against their logPow values [15,16].…”

Calibration and field performance of triolein embedded acetate membranes for passive sampling persistent organic pollutants in water

“…Huckins et al (2006) showed that for SPMD differences in exposure conditions cause sampling rates to be shifted by a constant factor for all compounds, the profile could be described by a third order polynomial function of log K ow . Vrana et al (2007) recently published a similar empirical model for the Chemcatcher samplers using a polynomial that described the relation of R s with K ow , with much stronger decline of higher of R s in the higher K ow range. In this paper, when use PRCs to estimate in situ k u in TECAM, the SPMD empirical model was applied.…”