Quantitative FTIR Method for Determination of Mineral Oil Deposited on Plant Leaves

Hodgkinson, M. C.; Sagatys, D.S.; MacKay, Alesha; Smith, G.A.

doi:10.1021/jf00059a002

Cited by 2 publications

(3 citation statements)

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“…Quantification of oil deposits has been an interesting topic for horticulturists, plant physiologists, entomologists, plant pathologists, and chemists. Gas chromotography (Furness et al, 1979), Fourier Transform Infra-red (FTIR) (Hodgkinson et al, 1996;Johnson et al, 2002) and fluorescence spectrophotometer (Furness and Newton, 1988) techniques have been developed to quantify the amounts of PDSOs applied to foliage. The results presented in this paper have demonstrated the potential for visualising of the localisation of PDSOs within plants.…”

Section: Discussionmentioning

confidence: 99%

“…However, despite their importance in inducing phytotoxicity the manner of movement and localization of PDSO molecules in plant tissues have been largely ignored since Knight et al (1929), Young (1934Young ( , 1935Young ( , 1941, Young and Morris (1933), and Rohrbaugh (1934Rohrbaugh ( , 1941 investigated movement of PDSO into and within plants using lipophilic stains and light microscopy. Recent studies, for example the use of fluorescence spectroscopy by Furness et al (1988) and Fourier transform infra-red (FTIR) spectroscopy by Hodgkinson et al (1996) and Johnson et al (2002b), have only focused on measuring surface deposits shortly after application of sprays. Fluorescence spectroscopy is not suitable for determining deposits within tissues and restrictions on the use of Freon and CCl 4 have largely rendered FTIR impractical for measuring both surface and internal deposits.…”

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confidence: 99%

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Noninvasive Localization of Petroleum-derived Spray Oil in Plants with Chemical Shift Selective Magnetic Resonance Imaging

Tan¹,

Reddy²,

Sarafis³

et al. 2005

HortSci

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Nuclear magnetic resonance (NMR) spectroscopy and magnetic resonance imaging (MRI) were used to detect petroleum-derived spray oils (PDSOs) in citrus seedlings and trees. The NMR spectrum of the phantom containing 10% (v/v) of a nC24 agricultural mineral oil (AMO) showed the resonance of the water protons at δ ≈ 5 ppm, while the resonance of the oil protons at δ = 1.3 to 1.7 ppm. The peak resolution and the chemical shift difference of more than 3.3 ppm between water and oil protons effectively differentiated water and the oil. Chemical shift selective imaging (CSSI) was performed to localize the AMO within the stems of Citrus trifoliata L. seedlings after the application of a 4% (v/v) spray. The chemical shift selective images of the oil were acquired by excitation at δ = 1.5 ppm by averaging over 400 transients in each phase-encoding step. Oil was mainly detected in the outer cortex of stems within 10 d of spray application; some oil was also observed in the inner vascular bundle and pith of the stems at this point. CSSI was also applied to investigate the persistence of oil deposits in sprayed mature Washington navel orange (Citrus ×aurantium L.) trees in an orchard. The trees were treated with either fourteen 0.25%, fourteen 0.5%, four 1.75%, or single 7% sprays of a nC23 horticultural mineral oil (HMO) 12 to 16 months before examination of plant tissues by CSSI, and were still showing symptoms of chronic phytotoxicity largely manifested as reduced yield. The oil deposits were detected in stems of sprayed flushes and unsprayed flushes produced 4 to 5 months after the last spray was applied, suggesting a potential movement of the oil via phloem and a correlation of the persistence of oil deposit in plants and the phytotoxicity. The results demonstrate that MRI is an effective method to probe the uptake and localization of PDSOs and other xenobiotics in vivo in plants noninvasively and nondestructively.

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Section: Discussionmentioning

confidence: 99%

mentioning

confidence: 99%

Noninvasive Localization of Petroleum-derived Spray Oil in Plants with Chemical Shift Selective Magnetic Resonance Imaging

Tan¹,

Reddy²,

Sarafis³

et al. 2005

HortSci

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“…In this work we describe the use of FTIR as a fast, accurate, and sensitive method for measuring the concentration of the abovementioned compounds. The use of FTIR peak height as the concentration determining factor has already been established for use with hydrocarbons [32,33]. More specifically, the use of the carbonyl group peak for the determination of concentration has already been described in the literature [34].…”

Section: Introductionmentioning

confidence: 99%

Solubility Temperature Dependence of Bio-Based Levulinic Acid, Furfural, and Hydroxymethylfurfural in Water, Nonpolar, Polar Aprotic and Protic Solvents

et al. 2021

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Bio-based levulinic acid (LA), furfural (FF), and hydroxymethylfurfural (HMF) represent key chemical intermediates when biorefining biomass resources, i.e., either cellulose, glucose, hexoses, etc. (HMF/LA), or hemicellulose, xylose, and pentose (FF). Despite their importance, their online in situ detection by process analytical technologies (PATs), solubility, and its temperature dependence are seldom available. Herein, we report their solubility and temperature dependence by examining n-hexane, cyclohexane, benzene, toluene, 1,4-dioxane, diethyl ether, dichloromethane, tetrahydrofuran, ethyl acetate, acetone, dimethylformamide, acetonitrile, dimethyl sulfoxide, formic acid, n-butanol, n-propanol, ethanol, methanol, and water. These solvents were selected as they are the most common nonpolar, polar aprotic, and polar protic solvents. Fourier-transform infrared (FTIR) spectroscopy was applied as a fast, accurate, and sensitive method to the examined solutions or mixtures. The latter also enables operando monitoring of the investigated compounds in pressurized reactors. Selected temperatures investigated were chosen, as they are within typical operating ranges. The calculated thermodynamic data are vital for designing biorefinery process intensification, e.g., reaction yield optimization by selective compound extraction. In addition to extracting, upstream or downstream unit operations that can benefit from the results include dissolution, crystallization, and precipitation.

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Quantitative FTIR Method for Determination of Mineral Oil Deposited on Plant Leaves

Cited by 2 publications

References 8 publications

Noninvasive Localization of Petroleum-derived Spray Oil in Plants with Chemical Shift Selective Magnetic Resonance Imaging

Noninvasive Localization of Petroleum-derived Spray Oil in Plants with Chemical Shift Selective Magnetic Resonance Imaging

Solubility Temperature Dependence of Bio-Based Levulinic Acid, Furfural, and Hydroxymethylfurfural in Water, Nonpolar, Polar Aprotic and Protic Solvents

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