Novel DGT method with tri-metal oxide adsorbent for in situ spatiotemporal flux measurement of fluoride in waters and sediments

Abstract

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Extending the functionality of the slurry ferrihydrite-DGT method: Performance evaluation for the measurement of vanadate, arsenate, antimonate and molybdate in water

“…1.). The mass accumulated after 60 min was similar to that measured at 24 h. Similar time dependency trends were observed in PF gels and other binding layers (Luo et al, 2010;Zhou et al, 2016). In the first 10 min, the relationship between the accumulated mass of the element and time is almost linear.…”

In situ sampling and speciation method for measuring dissolved phosphite at ultratrace concentrations in the natural environment

“…This value was much higher than D cell , for P +V (6.05 × 10 −6 cm 2 s − 1 ) andAs +V (6.10 × 10 −6 cm 2 s − 1 ), but lower than 7.65 × 10 −6 cm 2 s − 1 of As +III . Meanwhile, the average D DGT for P +III was measured as (6.92 ± 0.18) × 10 −6 cm 2 s − 1 , which agreed well with D cell with an acceptance of less than 5.5%, indicating that no measurable effect of the diffusive boundary layer between the diffusive gel and surface solution was found 25. Consistent results between D cell and D DGT have been previously reported in those studies of D-values for oxyanions such as P +V , As +III and As +V , W.…”

“…23 A DGT device consists of a binding gel layer, which is overlaid by a diffusive hydrogel and a protective filter membrane. 24,25 The analyte species of interest diffuse through the sampler, a process that acts to separate and clean-up the sample matrix, and are subsequently trapped and concentrated on a resin layer. 26 The technique possesses specific advantages, including the low disturbance of the target media during deployment/sample collection and low effective detection limits for trace chemicals.…”

Novel Method for in Situ Monitoring of Organophosphorus Flame Retardants in Waters

“…(The principles of the DGT technique are given in the Supporting Information.) DGT is well established for measuring various inorganic species in aquatic systems. − Recently, DGT has been extended to measuring organic pollutants, such as antibiotics, , bisphenols, pesticides, household and personal care products (HPCPs), and some polar chemicals in wastewater treatment plants . These developments have made it feasible to use DGT for measuring OPFRs in waters.…”