Use of Countercurrent Distribution in the Quantitative Determination of the Alkaloids of Commercial Veratrine.

Svoboda, Glenn R.

doi:10.1021/ac60192a015

Cited by 9 publications

(2 citation statements)

References 17 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Unfortunately, some alkaloids are somewhat unstable under the conditions required to achieve separation, thus making quantification difficult. Svoboda (1962) used countercurrent distribution in the quantitative determination of veratridine and other alkaloids in commercial veratrine. The percent veratridine found ranged from 28.4 to 31.0%.…”

Section: Resultsmentioning

confidence: 99%

Method for the Determination of Veratridine and Cevadine, Major Components of the Natural Insecticide Sabadilla, in Lettuce and Cucumbers

Zang

Fukuda

Rosen

1997

J. Agric. Food Chem.

View full text Add to dashboard Cite

Sabadilla, an insecticide widely used by organic farmers, can be separated into five of its components (veratridine, cevadine, cevine, cevacine, and sabadine) by high-performance liquid chromatography (HPLC) and detected by atmospheric pressure chemical ionization liquid chromatography mass spectrometry (APCI/LCMS). Using APCI/LCMS in the selected ion monitoring mode as the determinative step, an analytical method has been developed for the detection and quantitation of the two largest sabadilla components, veratridine and cevadine, in lettuce and cucumbers spiked with veratrine. The insecticides are extracted with acetonitrile/water, and the extract is cleaned up by solid phase extraction (SPE) on a C-18 cartridge. The limits of detection (calculated at a signal to noise ratio of 10 to 1) of veratridine and cevadine in cucumbers and lettuce are 1−2 ppb, and the recoveries range from 74% to 101%. Keywords: Organic farming; sabadilla; veratridine; cevadine; cevine; cevacine; sabadine; high-performance liquid chromatography (HPLC); atmospheric pressure chemical ionization liquid chromatography mass spectrometry (APCI/LCMS)

show abstract

Section: Resultsmentioning

confidence: 99%

Method for the Determination of Veratridine and Cevadine, Major Components of the Natural Insecticide Sabadilla, in Lettuce and Cucumbers

Zang

Fukuda

Rosen

1997

J. Agric. Food Chem.

View full text Add to dashboard Cite

show abstract

“…Methods of determination, including spectrographic, have been compared by Smythe and Whittem (466) for beryllium, by Beamish (25) for gold, and by Nowicka-Jankowska and Radwan (361) for the rare-earth elements. Svoboda (486) reported on the analysis of radioactive samples in a wall-stabilized arc in an atmosphere of oxygen; the method was claimed to provide improved reproducibility and sensitivity in comparison with a free-burning arc. Lemieux (283) described a method of rapid semiquantitative analysis with a photoelectric spectrometer, reporting a relative accuracy of ±20% at concentrations ranging from major constituents down to the trace level.…”

Section: Analysis Of Nonmetalsmentioning

confidence: 99%

Emission Spectrometry.

Scribner¹,

Margoshes²

1964

Anal. Chem.

View full text Add to dashboard Cite

This review, the eighth in a series on emission spectrometry, covers the period 1962 through December 1963 with some material that appeared in 1961. The review for the preceding period had been divided into three separate sections: emission spectrometry (441), emission flame photometry (305), and absorption flame photometry (159). These topics are treated together in this review and the discussions on flame photometry and atomic absorption spectroscopy are located toward the end of the review. Following the plan of earlier reviews, attention has been given to contribution of basic importance or applications that are new, unique, or extensive. The 565 references cited represent about one quarter of the publications treating of analytical emission spectrometry which appeared

show abstract