Direct and indirect polarimetry for detection in microbore liquid chromatography

Bobbitt, Donald R.; Yeung, Edward S.

doi:10.1021/ac00273a009

Cited by 78 publications

(53 citation statements)

References 29 publications

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“…Despite this limitation, lasers still offer more sensitivity than conventional light sources. Microbore cells as small as 1 cm have been reported with a volume of 1 μΐ, [178]. Flow cell Flow cells ideally are of long path length for maximum sensitivity and of small volume for maximum resolution.…”

Section: A Light Sourcementioning

confidence: 99%

“…Indirect polarimetry has been demonstrated by Bobbitt and Yeung using ( -)2-methyl-l-butanol: acetonitrile 50 : 50 mixture [[a] = -2.95°) as the eluent in the determination of dodecane [178]. They obtained a detection limit of 390 ng and predicted that if a mobile phase with [a] = 100° was used, a detection 0.0 limit of 12 ng could be achieved.…”

Section: As An Absorption Detectormentioning

confidence: 99%

“…This was described by Yeung for use with refractive index detection [194] and later extended to indirect polarimetric detection [178]. This was described by Yeung for use with refractive index detection [194] and later extended to indirect polarimetric detection [178].…”

Section: As An Absorption Detectormentioning

confidence: 99%

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Parriott

1993

A Practical Guide to HPLC Detection

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Section: A Light Sourcementioning

confidence: 99%

Section: As An Absorption Detectormentioning

confidence: 99%

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Parriott

1993

A Practical Guide to HPLC Detection

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“…[11][12][13][14][15][16] In general, when the analyte transfers the visualization reagent molecules from the stationary phase to the mobile phase and vice versa, the analyte could be indirectly detected due to a change in the background signal of the eluent. Nonionic compounds, such as alcohols, can be indirectly detected in reversed-phase LC, where analytes are visualized by their perturbation of the partition of a mobile-phase additive.…”

Section: Introductionmentioning

confidence: 99%

“…13 Bobbitt and Yeung 13 presented results on indirect polarimetric detection in microbore LC using a laboratory-made flow cell and an argon-ion laser as a light source. They achieved a mass detection limit of 390 ng at S/N = 3 for an optically inactive solute, such as dodecane, corresponding to a concentration detection limit of 0.078%.…”

Section: Introductionmentioning

confidence: 99%

Liquid Chromatographic Determination of Alcohols in Food and Beverages with Indirect Polarimetric Detection Using a β-Cyclodextrin Mobile Phase

et al. 2002

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An indirect polarimetric detection method for the determination of alcohols has been proposed in liquid chromatography (LC). Optically active mobile-phase additives, such as β-cyclodextrin (β-CD), could be used to visualize optically inactive alcohols in reversed-phase LC. The visualization of alcohols is based on a perturbation of the partition of β-CD caused by the alcohols. The detection limits of the present system at a signal-to-noise ratio of 3 were 0.031, 0.019, 0.018, 0.013, 0.011, 0.008 and 0.008% (v/v) for ethanol, 2-propanol, 1-propanol, 2-methyl-2-propanol, 2-butanol, 2-methyl-1-propanol and 1-butanol, respectively. The method was successfully applied to the determination of ethanol present in food and beverage samples.

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Highly Sensitive Polarization Rotation Measurement through a High‐Order Vector Beam Generated by a Metasurface

Yue

Aglieri

Piccoli

et al. 2020

Adv Materials Technologies

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The precise determination of the polarization state of light is fundamental for a vast variety of applications in remote sensing, astronomy, optics and terahertz technology, to name just a few. Typically, polarization characterization is performed by using a combination of multiple optical devices such as beam splitters, polarizers, and waveplates. Moreover, to achieve highprecision, balanced photodetectors and lock-in amplifiers are employed, thus contributing to increasing system complexity. Here, a technique for polarization rotation measurements with a dynamic range of 180° and a sensitivity of about 10−2 degrees is realized using a properly designed metasurface. Such device generates a vector beam with an azimuthally-dependent polarization distribution, as a result of the superposition of two vortex beams carrying opposite orbital angular momenta (ℓ = ±30). After propagation through a linear polarizer, the spatial intensity profile of such a beam turns into 60 lobes. By tracking the displacement of only two of these lobes on a camera, the rotation of the input polarization state can be retrieved with high resolution. The proposed approach offers a new route toward the development of compact high-precision polarimeters and can also be exploited in quantum information processing, optical communications, as well as nonlinear and chiral optics.

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Direct and indirect polarimetry for detection in microbore liquid chromatography

Cited by 78 publications

References 29 publications

Other Modes of Detection

Other Modes of Detection

Liquid Chromatographic Determination of Alcohols in Food and Beverages with Indirect Polarimetric Detection Using a β-Cyclodextrin Mobile Phase

Highly Sensitive Polarization Rotation Measurement through a High‐Order Vector Beam Generated by a Metasurface

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