An automated procedure for the determination of sulphur in plant tissue

Basson, W. D.; Böhmer, R. G.

doi:10.1039/an9729700266

Cited by 18 publications

(3 citation statements)

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“…Wet ashing of plant samples using HNO, + HC104 has proved satisfactory for the determination of micronutrients (Gorsuch, 1959(Gorsuch, ,1970Isaac and Johnson, 1975;Koirtyohann and Pickett, 1975) and macronutrients (Gorsuch, 1970;Isaac and Johnson, 1975), while with dry ashing lower values have occasionally been reported for some micronutrients due to incomplete recovery (Basson and Bohmer, 1972;Gorsuch, 1970). Nevertheless, the dry ashing technique is widely used because of convenience and because the wet digestion method using perchloric acid can be hazardous.…”

Section: Munoo Prasad* and Michael Spiersmentioning

confidence: 96%

Comparative study of ashing techniques for the digestion of horticultural plant samples

Prasad¹,

Spiers²

1978

J. Agric. Food Chem.

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024spectrometer and compared with the spectra derived from authentic compounds or with published spectra. RESULTS AND DISCUSSIONThe compounds isolated and their relative abundance in cinnamon leaf, stem bark, and root bark oils are shown in Table I. Of the compounds identified, eight have not previously been reported in cinnamon oils. The new compounds were the monoterpene, terpinolene, the sesquiterpene, caryophyllene oxide, and six aromatic compounds (benzaldehyde, methyl chavicol, hydrocinnamaldehyde, 2-phenylethyl alcohol, 2-phenylpropyl acetate, and coumarin). A further 24 compounds that have not been previously found in cinnamon oils were tentatively identified and included ten monoterpenes (myrcene, cis-ocimene, trans-ocimene, fenchone, trans-linalool oxide furanoid form, linalyl acetate, bornyl acetate, borneol, geraniol, and geranyl acetate), three sesquiterpenes (Pselanene, y-cadenene, and farnesol), two aliphatic compounds (hexanol and nonanal), and nine aromatic compounds (2-phenylacetaldehyde, 2-phenylethyl acetate, benzyl alcohol, phenol, methyleugenol, methylisoeugenol, 2 -vinylphenol, vanillin, and 2-phenylethyl benzoate). Final identification of these volatiles awaits mass spectral analysis.Most compounds were found in all three oils but the composition of the oils was quite different. The major component in leaf oil was eugenol (-70%) with caryophyllene, linalool, and benzyl benzoate also of some quantitative importance. Cinnamaldehyde (75%) was the major component in stem bark oil with a contribution also from cinnamyl acetate and caryophyllene, while camphor (56%) was the major component of root bark oil with cineole, cu-terpineol, a-pinene, and limonene also of importance.

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Section: Munoo Prasad* and Michael Spiersmentioning

confidence: 96%

Comparative study of ashing techniques for the digestion of horticultural plant samples

Prasad¹,

Spiers²

1978

J. Agric. Food Chem.

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“…Another conventional method, turbidimetry has been used widely for the determination of sulfate in natural waters for a long time. It was also applied to a number of samples' determination through automated flow analysis systems, but all of them are detected by spectrophotometer ( − ). Therefore, turbidimetry suffers from the disadvantage of low sensitivity and inapplicability to low sulfate containing samples.…”

Section: Introductionmentioning

confidence: 99%

Sensitive Determination of Sulfate in Drinks and Vegetables Digests by Rayleigh Light Scattering Technique

Zhao

Zhang

Cheng

et al. 2004

J. Agric. Food Chem.

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In this paper, a novel and sensitive method based on Rayleigh light scattering technique (RLS) was proposed for the determination of sulfate using a conventional spectrofluorometer. Sulfate was transformed to BaSO4 particles, which displayed intense light scattering in aqueous solutions. The effects of factors such as wavelength, acidity, stabilizers and interferents were studied in detail. The RLS intensity of the BaSO4 suspension was obtained in 0.1 mol L(-1) of [H+] and the addition of 2 mL of cationic polyacrylamide (CPAM) with 7.05 x 10(-3) mmol mL(-1) charged cations and 1.0 mL of BaCl2.2H2O (5.0%) at 510 nm. In the range of 8-400 microg mL(-1), RLS intensity was linear to the concentration of BaSO4, and the detection limit was 0.3 microg mL(-1). To determine the feasibility of the proposed method, some samples of water, drinks, and vegetables digests were analyzed, and the results were in agreement with the standard turbidimetric method. Good recovery results were also obtained in the range of 94-105%. Although this method was limited in stability, it was characterized with simplicity, sensitivity, reliability, and little interference.

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“…The determination of sulfur in plants has generally been restricted to turbidimetric procedures (Tabatabai and Bremner, 1970;Basson and Bohmer, 1972;Chan, 1975) and X-ray fluorescence spectroscopy (Alexander, 1965;Tomassini and others, 1976;Norrish and Hutton, 1977). Combustion techniques with either photometric or titrimetric quant itat ion of evolved sulfur have also been used to a limited extent (Tiedemann and Anderson, 1971;Jones and Isaac, 1972;Bartels and Pham, 1982).…”

Section: Introductionmentioning

confidence: 99%

Determination of total sulfur in lichens by combustion-infrared analysis

Jackson¹,

Engleman²,

Peard³

1984

Open-File Report

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Sulfur was determined in Parmelia sulcata and P. chlorochroa by combustion of the sample and infrared detection of evolved sulfur dioxide using an automated sulfur analyzer.Vanadium pentoxide was used as a combustion accelerator. Pelletization of the sample prior to combustion was not found advantageous. Washing studies showed that leaching of sulfur was not a major factor in the sample preparation.The combustion-IR analysis usually gave higher sulfur content than the turbidimetric analysis as well as shorter analysis time.Relative standard deviations of less than 7% were obtained by the combustion-IR technique when sulfur levels in lichens ranged from 0.05-0.20%.Determination of sulfur in National Bureau of Standards orchard leaves standard reference material showed good agreement between the combustion-IR technique and other instrumental procedures.

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An automated procedure for the determination of sulphur in plant tissue

Cited by 18 publications

References 0 publications

Comparative study of ashing techniques for the digestion of horticultural plant samples

Comparative study of ashing techniques for the digestion of horticultural plant samples

Sensitive Determination of Sulfate in Drinks and Vegetables Digests by Rayleigh Light Scattering Technique

Determination of total sulfur in lichens by combustion-infrared analysis

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