Determination of Chromium Speciation in Tap Water Using Diffusive Gradients in Thin Film Technique

Guo, Lianwen; Chen, Hong; Zhang, Yangyang; Bo, Le; Lǐ, Jiànróng

doi:10.1246/cl.140100

Cited by 5 publications

(2 citation statements)

References 14 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The proposed approach was evaluated for the analysis of tap water. Recoveries of the spiked Cr(VI) and Cr(III) were 98.2-107.7% and 97.9-105.3%, respectively [13].…”

Section: = δ (mentioning

confidence: 95%

In situ redox speciation analysis of chromium in water by diffusive gradients in thin films using a DE81 anion exchange membrane

Suárez

Simone

Menegário

et al. 2016

Talanta

View full text Add to dashboard Cite

A method for the in situ redox speciation analysis of chromium in water by the diffusive gradients in thin films (DGT) technique using a DE81 anion exchange membrane was successfully developed. For the selective uptake of Cr(VI), a DGT device containing an anion exchange membrane DE81 (cellulose acetate chromatographic paper) was used (DE81-DGT), while selective uptake of Cr(III) was carried out using DGT devices containing the Chelex-100 resin (Chelex-100-DGT). A correlation coefficient of 0.993 was obtained for the linearity of the immersion curves (mass versus time) using DE81-DGT. The diffusion coefficient values for Cr(VI) through the agarose diffusive layer were equal to 4.89±0.5×10(-6)cm(2)s(-1) and 3.95±0.02×10(-6)cm(2)s(-1) (T=23±1°C, I=0.03molL(-1) NaNO3) were obtained by using diffusion cell and immersion curves, respectively. The retention of Cr(VI) by the DE81 membrane in a synthetic sample and river water was not affected by the pH over a wide range 4-9). Recoveries of Cr(VI) between 90% and 120% from solutions of ionic strength ranging from 0.01 to 0. 5molL(-1) NaNO3 were achieved. Finally, the redox speciation analysis of Cr(III) and Cr(VI) in spiked river water and synthetic samples was performed with recoveries greater than 80% and 87% by using Chelex-100-DGT and DE81-DGT devices, respectively. Those results were in excellent agreement with the diphenylcarbazide spectrophotometric method.

show abstract

“…The proposed approach was evaluated for the analysis of tap water. Recoveries of the spiked Cr(VI) and Cr(III) were 98.2-107.7% and 97.9-105.3%, respectively [13].…”

Section: = δ (mentioning

confidence: 95%

In situ redox speciation analysis of chromium in water by diffusive gradients in thin films using a DE81 anion exchange membrane

Suárez

Simone

Menegário

et al. 2016

Talanta

View full text Add to dashboard Cite

show abstract

“…Polyquaternary ammonium salt (PQAS) is a water-soluble cationic polymer and interacts with anionic substances present in aqueous solutions . A PQAS aqueous solution, as a liquid binding phase in the DGT sampler, has been applied to the measurement of dissolved Cr(VI). , In this paper, A DGT technique with a dialysis membrane as the diffusive phase and a PQAS aqueous solution as the binding phase (PQAS DGT) was investigated for the sampling of DRP in water. The influences of solution pH and ionic strength on the properties of PQAS DGT were studied.…”

Section: Introductionmentioning

confidence: 99%

Measurement of Dissolved Reactive Phosphorus in Water with Polyquaternary Ammonium Salt as a Binding Agent in Diffusive Gradients in Thin-Films Technique

Chen

Zhang

et al. 2014

J. Agric. Food Chem.

Self Cite

View full text Add to dashboard Cite

Diffusive gradients in thin-films (DGT) sampler with a polyquaternary ammonium salt (PQAS) aqueous solution as a binding phase and a dialysis membrane as a diffusive phase (PQAS DGT) was developed for the measurement of dissolved reactive phosphorus (DRP) in water. The performance of PQAS DGT was not dependent upon pH 3-10 and ionic strength from 1 × 10(-4) to 1 mol L(-1). The effective binding capacity of PQAS DGT containing 2.0 mL of 0.050 mol L(-1) PQAS solution was estimated as 9.9 μg cm(-2). The measurement of DRP in a synthetic solution by PQAS DGT over a 48 h deployment period demonstrated high consistency with the concentration of DRP in the synthetic solution measured directly by the ammonium molybdate spectrophotometric method. Field deployments of PQAS DGT samplers allowed for accurate measurement of the DRP concentration in situ. The advantages of PQAS DGT include no requirement of the elution steps and direct concentration measurements of the binding phase.

show abstract

Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

et al. 2021

View full text Add to dashboard Cite

The determination of the concentration of an environmental pollutant is not sufficient to assess the related health risk because this pollutant may not be bioavailable. Therefore, methods to determine pollutant bioavailability are more relevant to assess toxicity than measuring the total concentration. For instance, the diffusive gradient in thin films (DGT) is an in situ dynamic technique used to measure the concentration of labile compounds in the environment. Here we review the latest developments achieved in speciation and bioavailability of metals and metalloids using this technique. We detail the technique, common binding agents and diffusive gels. We give laboratory procedures to prepare the gels, and we explain calculations using the DGT-induced fluxes in soils (DIFS) modeling. DIFS models can predict the resupply capacities from soils to porewater, and the uptake of trace elements by plants. Procedures for in situ field deployments, including issues of biofilm growth, are also discussed.

show abstract

Determination of Chromium Speciation in Tap Water Using Diffusive Gradients in Thin Film Technique

Cited by 5 publications

References 14 publications

In situ redox speciation analysis of chromium in water by diffusive gradients in thin films using a DE81 anion exchange membrane

In situ redox speciation analysis of chromium in water by diffusive gradients in thin films using a DE81 anion exchange membrane

Measurement of Dissolved Reactive Phosphorus in Water with Polyquaternary Ammonium Salt as a Binding Agent in Diffusive Gradients in Thin-Films Technique

Diffusive gradients in thin films for the measurement of labile metal species in water and soils: a review

Contact Info

Product

Resources

About