• Publications
  • Influence
Immuno-affinity solid-phase extraction.
  • D. Stevenson
  • Chemistry, Medicine
  • Journal of chromatography. B, Biomedical sciences…
  • 4 August 2000
The measurement of trace organics such as drugs and pesticides at low concentration in biological and environmental samples is a challenging analytical task. Despite recent advances inExpand
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Rapid extraction and high-performance liquid chromatographic determination of parthenolide in feverfew (Tanacetum parthenium).
A rapid and sensitive method for quantifying parthenolide in feverfew herb (Tanacetum parthenium) was developed that is significantly faster than those reported in the literature. The extractionExpand
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Rapid method for the determination of organochlorine pesticides in milk.
This method involved one step solvent extraction of milk with ethyl acetate-acetone-methanol by ultrasonication. The supernatants were further cleaned-up and enriched by solid-phase extraction usingExpand
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Production of (S)-3-chlorolactaldehyde from (S)-alpha-chlorohydrin by boar spermatozoa and the inhibition of glyceraldehyde 3-phosphate dehydrogenase in vitro.
The (S)-isomer of the male antifertility agent alpha-chlorohydrin was metabolized by mature boar spermatozoa in vitro to (S)-3-chlorolactaldehyde. This oxidative process, which did not occur whenExpand
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Solid phase extraction of clenbuterol from plasma using immunoaffinity followed by HPLC.
An immuno-extraction column for clenbuterol has been prepared. Optimum conditions for the selective retention and elution of clenbuterol have been developed, based on a modification of our earlierExpand
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Development of an enzyme-linked immunosorbent assay for isoproturon in water.
A competitive enzyme-linked immunosorbent assay (ELISA) suitable for the determination of the urea herbicide isoproturon [3-(4-isopropylphenyl)-1,1-dimethyl urea] in water has been developed. AExpand
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The fate of oxalic acid in the Wistar rat.
1. An established procedure for determining oxalate in human urine has been modified for rat urine. The daily excretion of oxalate by the male Wistar rat is 570-650 microgram. 2. Oxalate excretion inExpand
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Measurement of methimazole in human plasma using gas-liquid chromatography.
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The decomposition of aspirin in aspirin, phenacetin, and caffeine tablets.
Abstract Through tests on tablets made in our own laboratories and on market samples, it was noted that many formulations of aspirin, phenacetin, and caffeine showed decomposition of aspirin. TheExpand
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Determination of morphine in urine by solid-phase immunoextraction and high-performance liquid chromatography with electrochemical detection.
The analysis of morphine in biological fluids is of vital interest in monitoring opiate abuse and in drug abuse research. Although methods for analysis of morphine and its metabolites are wellExpand
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