Detection of mixtures of organic pollutants in water by polymer film receptors in fibre-optical sensors based on reflectometric interference spectrometry

Yan, Hongling; Kraus, Gerolf; Gauglitz, G.

doi:10.1016/0003-2670(95)00213-j

Cited by 31 publications

(16 citation statements)

References 12 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Pollutants can be detected in the gaseous and liquid phases [252]. The lack of selectivity of polymers towards specific compounds can be overcome by application of multivariate data analysis [250,251] or curve fitting techniques applied to the time-resolved signals [448]. The combination of an interferometric measurement of the swelling of a polymer with the color change of a doped indicator dye allows the determination of ammonia and a perhalogenated compound using only one sensor element [171].…”

Section: Swellingmentioning

confidence: 99%

Opto-Chemical and Opto-Immuno Sensors

Gauglitz¹

1996

Sensors Update

View full text Add to dashboard Cite

Section: Swellingmentioning

confidence: 99%

Opto-Chemical and Opto-Immuno Sensors

Gauglitz¹

1996

Sensors Update

View full text Add to dashboard Cite

“…Especially, it was difficult to achieve quick responses in aqueous solution. In this paper we would like to present molecularly imprinted polymers containing benzamidine groups (see Structure 1) as sensitive layers on transducers used for the optical measurement technique reflectometric interference spectroscopy (RIfS) [17,18,19] in the aqueous phase. By time-dependent detection of changes in the optical thickness (n×d) of thin polymer films (<100 nm) an interaction between the MIP and analyte molecules can be monitored.…”

Section: Introductionmentioning

confidence: 99%

Amidine-based molecularly imprinted polymers?new sensitive elements for chiral chemosensors

Nopper

Lammershop

Wulff

et al. 2003

Analytical and Bioanalytical Chemistry

View full text Add to dashboard Cite

Using the optical measurement technique reflectometric interference spectroscopy (RIfS), the interaction of molecularly imprinted polymers (imprinted with either (R, R)- or (S, S)-2,3-di- O-benzoyltartraric acid) with the corresponding templates and template antipodes were investigated. With these sensors chiral separation with a separation factor of 1.2 could be achieved whereas a reference polymer resulted in no separation. RIfS signals were of opposite sign for imprinted polymer layers containing phenylboronic acid binding site monomers.

show abstract

“…Existing universal CE detectors include micro-interferometric backscatter detector, 7 refractive index detector, [8][9][10][11][12] thermoptical absorbance detector, 13 condensation nucleation light-scattering detector, 14 and a recent one based on thermally induced capillary vibrations. 15 All of these are optical techniques, which require light sources and photodetectors, and careful optical alignment.…”

Section: Introductionmentioning

confidence: 99%

Acoustic wave detection of chemical species electrokinetically transported within a capillary tube

Prasad

2003

Analyst

View full text Add to dashboard Cite

For the first time, we report the acoustic wave detection of chemical species being transported in a capillary tube to a region where acoustic coupling occurs. The measured parameter was a change in phase, which was originally only attributed to a change in solution density as the analyte passed by the detection region. Accordingly, we report the detection of change in phase as various chemical species (e.g. Cy5 dye, Cy5-derivatized glycine and underivatized glycine) were introduced into and migrated along a capillary tube through electrokinetic processes. To improve detection sensitivity, we modified various experimental parameters, such as run buffer concentration, capillary wall thickness and transducer frequency. Although acoustic wave detection was feasible, the peak width and detection limit were inadequate as compared to conventional detection methods for HPLC or CE. Nevertheless, the effects of various physical and chemical relaxation processes on acoustic wave absorption were discussed, and this has shed some light on explaining some observations, which cannot be explained by density differences alone. Accordingly, the acoustic wave method is suggested to investigate these processes, as studied in ultrasonic relaxation spectroscopy, in a flow system.

show abstract

Detection of mixtures of organic pollutants in water by polymer film receptors in fibre-optical sensors based on reflectometric interference spectrometry

Cited by 31 publications

References 12 publications

Opto-Chemical and Opto-Immuno Sensors

Opto-Chemical and Opto-Immuno Sensors

Amidine-based molecularly imprinted polymers?new sensitive elements for chiral chemosensors

Acoustic wave detection of chemical species electrokinetically transported within a capillary tube

Contact Info

Product

Resources

About